Basic Programming in Python You'll get to know the basic fundamentals of Python, Programming is done on Eclipes based on Infosys Module
Objective:
print Hello World!
Objective: Given a real-world problem, be able to understand the need for programming fundamentals such as identifiers, variables, data types etc.
Problem Description: A retail store management wants to automate the process of generating the bill amount for its customers. As an initial step, they want to initialize the bill details of a customer as given below: Bill id should be 1001, customer id should be 101 and bill amount should be 199.99. After initializing, all the values must be displayed in the format given below:
bill_id: 1001
customer_id: 101
bill_amount: Rs.199.99
Analyze the above problem statement and answer the following questions:
- What do you think is needed to write a program to implement the solution for the above problem statement?
Summary of this assignment: In this assignment, you have understood the need of a high-level programming language and programming fundamentals such as identifiers, variables, data types, operators etc.
Objective: Given a real-world problem, be able to identify the data types of the variables required to solve it
Problem Description: For the previous assignment, identify the data types that may be used to represent bill id, customer id and bill amount.
Summary of this assignment: In this assignment, you have learnt to identify the data type for the variables based on the real-world problem
Objective: Given a real-world problem, be able to identify the variables and operators required to solve the problem and implement it using a high-level programming language like Python Problem Description: Predict the output of following Python Statements.
print ("Value of e is %0.1f" , 2.713 )
print ("Value of e is %0.1f" %2.713 )
print ("Programming in Python: Version %d" %3.5 )
print ("%20s : %d" % ("Python 3.0 is also known as Python",3000.57 ))
x=2
print ("{0:2d} {1:3d} {2:4d}".format(x, x*x, x*x*x))
Summary of this assignment: In this assignment, you have learnt to make use of format specifiers for different type of data variables based on the real-world problem
Objective: Given a real-world problem, be able to identify the variables and operators required to solve the problem and implement it using a high-level programming language like Python
Problem Description: Write a Pseudocode and Python program to implement the real-world problem discussed in Programming constructs in Python Assignment 2. Compile and execute the program using Eclipse IDE. You may want to refer to Programming constructs in Python Assignment 1 to understand how Eclipse IDE may be used for writing and executing a Python program.
INITIALIZE_VARIABLES_DISPLAY
- bill_id = 1001
- customer_id = 101
- bill_amount = 199.99
- display "Bill Id:", bill_id
- display "Customer Id:", customer_id
- display "Bill Amount:Rs.", bill_amount
Summary of this assignment: In this assignment, you have understood how to implement the solution for a simple real-world problem using variables and operators
Objective: Given a real-world problem, be able to identify the variables and operators required to solve the problem and implement it using a high-level programming language like Python
Problem Description: The finance department of a company wants to calculate the monthly pay of one of its employee. Monthly pay should be calculated as mentioned in the below formula and display all the employee details.
Monthly Pay = Number of hours worked in a week * Pay rate per hour * No. of weeks in a month
Note: The number of hours worked by the employee in a week should be considered as 40, Pay rate per hour should be considered as Rs.400 and Number of weeks in a month should be considered as 4 Write Pseudo code and Python program in Eclipse to implement the above real-world problem.
Summary of this assignment: In this assignment, you have learnt to implement the solution for a simple real-world problem using variables and operators
Objective: Given a real-world problem, be able to identify the variables and operators required to solve the problem and implement it using a high-level programming language like Python
Problem Description: Write the assignment statement to swap 2 numbers x and y? (Without using temp variable)
Summary of this assignment: In this assignment, you have learnt to implement the solution for a simple real-world problem using variables and operators
Objective: Given a real-world problem, be able to identify the variables and operators required to solve the problem and implement it using a high-level programming language like Python
Problem Description: Predict the output of following code snippet
num = 16
num1 = num/6
num2 = num//6
num3 = num//6.0
print(num1)
print(num2);
print(num3)
Summary of this assignment: In this assignment, you have learnt to implement the solution for a simple real-world problem using variables and operators
Objective: Revisit the concept and usage of id() and type() functions
Problem Description: Dry run the below code snippets and predict the output. You may want to confirm the output by executing the code using Eclipse IDE.
obj_x = 10
obj_y = obj_x
if ( id(obj_x) == id(obj_y) ):
print("Address of obj_x and obj_y is same")
else:
print("Address of obj_x and obj_y is not same")
obj_x = 10
obj_y = obj_x
if ( obj_x is obj_y ):
print("obj_x and obj_y have same identity")
else:
print("obj_x and obj_y do not have same identity")
obj_x = 10
obj_y = obj_x
obj_y = obj_x + 1
if ( obj_x is not obj_y ):
print("obj_x and obj_y do not have same identity")
else:
print("obj_x and obj_y have same identity")
int_a = 10
raw_input = input("Enter a number")
print("Type of int_a:", type(int_a))
print("Type of raw_input:", type(raw_input))
print(int_a + raw_input)
Summary of this assignment: In this assignment, you have understood the concept and usage of id() and type() built-in functions.
In Code 4 there's meant to be an error (type error), to show that int & str can't be concatenated straight away
Objective: Given a set of source code and an identified set of best practices, be able to implement the techniques during coding Problem Description: Coding standards are very important for maintenance of code and for understanding of the code. Identify the sections of the given program where the coding standards are not followed and correct them.
itemNo=1005 unitprice = 250
quantity = 2
amount=quantity*unitprice
print("Item No:",itemNo)
print("Bill Amount:",amount)
Summary of this assignment: In this assignment, you have learnt Python coding standards
Objective: Given a real-world problem be able to understand the need for control structures and operators to implement the logic and solve the problem
Problem Description: The scenario discussed in Programming Fundamentals Assignment 5 is revisited here. Suppose the retail store management now wants to provide 2% discount for all bill amounts above Rs.500 and for all other bill amount, a discount of 1%. What do you think is needed to implement this scenario?
Summary of this assignment: In this assignment, you have understood the need of operators and control structures using a real-world problem
Objective: Given a real world problem be able to understand the need for control structures and operators to implement the logic and solve the problem
Problem Description: Suppose the retail store management now wants to provide 2% discount for all bill amounts above Rs.500 and for all other bill amont, a discount of 1%.
Write a Python program to implement the same?
bill_id = 1001
customer_id = 101
bill_amount = 200.0
discounted_bill_amount = 0.0
print("Bill Id:%d" %bill_id)
print("Customer Id:%d" %customer_id)
Note the use if else statement
print("Bill Amount:Rs.%f" %bill_amount)
if bill_amount > 500:
discounted_bill_amount = bill_amount - bill_amount * 2 / 100
else:
discounted_bill_amount = bill_amount - bill_amount * 1 / 100
print("Discounted Bill Amount:Rs.%f" %discounted_bill_amount)
Summary of this assignment: In this assignment, you have understood the implementation of operators and control structures using a real world problem
Objective: Given a real world problem be able to understand the need fo F438 r control structures and operators to implement the logic and solve the problem
Problem Description: Suppose the retail store management now wants to provide discount for all bill amounts as mentioned below. Assume bill amount will be always greater than 0. Note Note Note Note the use if else statement the use if else statement the use if else statement the use if else statement the use if else statement the use if else statement the use if else statement the use if else statement the use if else statement
Bill Amount
Discount %
>=1000 5
>=500 and <1000 2
>0 and <500 1
Write a Python program to implement the same?
bill_id = 1001
customer_id = 101
bill_amount = 1200.0
discounted_bill_amount = 0.0
discount = 0
print("Bill Id: %d" %bill_id)
print("Customer Id: %d" %customer_id)
print("Bill Amount:Rs. %f" %bill_amount)
if bill_amount >= 1000:
discount = 5
elif bill_amount >= 500:
discount = 2
else:
discount = 1
discounted_bill_amount = bill_amount - bill_amount * discount / 100
print("Discounted Bill Amount:Rs. %f" %discounted_bill_amount)
Summary of this assignment: In this assignment, you have understood the implementation of operators and control structures using a real world problem
Objective: Given a real-world problem be able to understand the need for control structures and operators to implement the logic and solve the problem
Problem Description: Suppose the retail store management now wants to provide discount for all bill amounts as mentioned below.
Customers can be considered to be valid, if their customer id is between 101 and 1000(both inclusive). For valid customers, discount must be provided as per the table given below:
Bill Amount
Discount %
>=500 10
Objective: Given a real-world problem be able to understand the need for control structures and operators to implement the logic and solve the problem
Problem Description: Objective: Given a real-world problem be able to understand the need for control structures and operators to implement the logic and solve the problem
Problem Description: The finance department of a company wants to calculate the monthly net pay of one of its employee by finding the income tax to be paid (in Indian Rupees) and the net salary after the income tax deduction. The employee should pay income tax if his monthly gross salary is more than Rs. 10,000 (Indian Rupees) and the percentage of income tax should be considered as 20% of the gross salary. Display the employee id, basic salary, allowances, gross pay, income tax and net pay. Note:
Employee Id must be considered as 1001,
Basic salary of the employee must be considered as Rs.15000.00 and
Allowances must be considered as Rs.6000.00
Write a Pseudo code and Python program in Eclipse to solve the above real-world problem. Refer below for the formulae to be used.
Monthly Gross Salary = Basic Salary + Allowances
Net Salary = Gross Salary – Income Tax
Summary of this assignment: In this assignment, you have understood the implementation of operators and control structures using a real-world problem
Objective: Given a real-world problem be able to understand the need for control structures and operators to implement the logic and solve the problem
Problem Description: Extend the program written for Assignment 15 to find the income tax to be paid (In Indian Rupees) and the total salary after the income tax deduction as per the details given in below table.
| Gross Salary (In Indian Rupees) | Income Tax percentage |
|---|---|
| Below 5,000 | Nil |
| 5,001 to 10,000 | 10 % |
| 10,001 to 20,000 | 20% |
| More than 20,000 | 30% |
Display the employee id, basic salary, allowances, gross pay, income tax and net pay.
Note: Employee Id must be considered as 1001, Basic salary of the employee must be considered as Rs.15000.00 and Allowances must be considered as Rs.6000.00 Write a Pseudo code and Python program in Eclipse to solve the above real-world problem.
Summary of this assignment: In this assignment, you have understood the implementation of operators and control structures using a real-world problem
Objective: Given a real-world problem, implement the logic and solve the problem using appropriate constructs (sequential, selection, iteration) using an object-oriented programming language (Python)
Problem Description: Dry run the below code snippets and predict the output. You may want to confirm the output by executing the code using Eclipse IDE.
counter = 1
while counter <= 3:
print(counter)
counter += 1
print("End of Program")
print("To find the sum of first 10 integers:")
result = 0
for value in range(1,11):
result = result + value
print("Sum:",result);
number = 1
result = 0
while number < 5:
result = result + number
number = number + 1
print(result)
result = 0
for index in range(40, 10, -2):
if(index % 5 == 0):
result = result + index
print(result)
amount = 100.0
interest = 0.0
months = 1
while months < 6:
interest = amount * 0.2
amount = amount + interest
months += 1
print(amount)
Summary of this assignment: In this assignment, you have understood the implementation of iteration control structures.
Objective: Given a real-world problem, implement the logic and solve the problem using appropriate constructs (sequential, selection, iteration) using an object-oriented programming language (Python)
Problem Description: Dry run the below code snippet and predict the output. You may want to confirm the output by executing the code using Eclipse IDE.
count = 0
result = 0
for count in range (1, 10):
result = result + count
On countering the break statement, control will move out of the loop as shown here Note the use of break statement
if result > 6:
break
print("Result =", result)
Summary of this assignment: In this assignment, you have understood the implementation of break statement.
Objective: Given a real-world problem, implement the logic and solve the problem using appropriate constructs (sequential, selection, iteration) using an object-oriented programming language (Python)
Problem Description: Dry run the below code snippet and predict the output. You may want to confirm the output by executing the code using Eclipse IDE.
count = 0
for count in range(0,10):
if 4 == count:
continue
print(count)
Summary of this assignment: In this assignment, you have understood the implementation of continue statement.
Objective: Given a real-world problem, implement the logic and solve the problem using appropriate constructs (sequential, selection, iteration) using an object- oriented programming language (Python)
Problem Description: The code given below is written to display all the even numbers between 50 and 80 (both inclusive). Debug the program to get the correct output.
Step 1: Type the below program in Eclipse, save the file as for_loop.py, compile and execute.
for i in range (50, 80):
if i % 2 == 0:
print(i)
else:
break
Step 2: Correct the logical error in the code, save, compile and execute the code
Step 3: Implement the same logic using while loop
Summary of this assignment: In this assignment, you have learnt the implementation of iteration control structure and break statement.
Objective: Observe the need for features in the retail application scenario to correlate the application of Strings
Problem Description: In the retail application, along with the earlier details included for Customer, the retail shop wants to keep track of customer name. Customer name should be between 3 and 20 characters.
Answer the following question: What do you think is needed to implement the solution for the above problem?
Summary of this assignment: In this assignment, you have understood the need of strings using a retail application scenario
Objective: Observe the need for features in the retail application scenario to correlate the application of Strings
Problem Description: In the retail application, along with the earlier details included for Customer, the retail shop wants to keep track of customer name. Customer name should be between 3 and 20 characters.
bill_id = 1001
customer_id = 1001
bill_amount = 2000
customer_name = Kevin
bill_id = input("Please enter Bill id")
customer_id = input("Please enter Customer id")
bill_amount = input("Please enter bill Amount")
customer_name = input("Please enter Customer Name")
if ((len(customer_name) >= 3) and (len(customer_name) <= 20)) is True:
print("Bill Id: ",bill_id)
print("Customer Id: ",customer_id)
print("Bill Amount:Rs. ",bill_amount)
print("Customer Name: ",customer_name)
else:
print("Invalid customer name. Customer name must be between 3 and 20 characters");
Summary of this assignment: In this assignment, you have understood the implementation of Strings and String methods using a retail application scenario
Objective: Revisit String concepts through a quiz
Problem Description: Assume, string1 = “Infosys Limited” string2 = “Mysore” Predict the output of following statements:
Q1: print(string1[:4])
Q2: print(string1[-1])
Q3: print(string1 * 2)
Q4: print(string1[:-1] + string2 + string1[:-1])
Q5: print (string2[1])
Q6: print (string2[4])
Q7: print(string1 * 2 + string1[:-1] + string2)
Summary of this assignment: In this assignment, you have revisited concepts of strings through code snippets
Objective: Given a computational problem, be able to use the right data structures (lists and strings) and implement the solution to the problem and test using a set of values in an IDE
Problem Description:
a. Write a program to count and display the number of capital letters in a given string.
b. Write a program to check if the given string is Palindrome or not?
c. Write a program to count the number of each vowel in a string
d. Write a program to remove all punctuation from the string provided by the user
punctuations = '''!()-[]{};:'"\,<>./?@###$%^&*_~'''
Hint: Use membership operators IN, Not IN
Summary: In this assignment, you have understood the application and implementation of Strings concept for the given computational problem.
Objective: Given a computational problem, be able to use the right data structures (lists and strings) and implement the solution to the problem and test using a set of values in an IDE
Problem Description: Write a Python program to accept a string and display the resultant string in reverse order. The resultant string should contain all characters at the even position of accepted string ignoring blank spaces.
accepted_string: An apple a day keeps the doctor away
resultant_string: Aapedyepteotrwy
expected_output: ywrtoetpeydepaA
Summary: In this assignment, you have understood the application and implementation of Strings concept for the given computational problem.
Objective: Given a computational problem, be able to use the right data structures (lists and strings) and implement the solution to the problem and test using a set of values in an IDE
Problem Description: Given a string containing both upper and lower case letters. Write a Python program to count the number of repeated characters and display the maximum count of a character along with the character.
Sample Input: ABaBCbGc
Summary: In this assignment, you have understood the application and implementation of Strings concept for the given computational problem.
Objective: Given a computational problem, be able to use the right data structures (lists and strings) and implement the solution to the problem and test using a set of values in an IDE
Problem Description: Consider 2 strings string1 and string2 and display the merged_string as the output. The merged_string should be capital letters from both the strings in the order they appear.
Note: Each character should be checked if it is a capital letter and then it should be merged.
string1: I Like C
string2: Mary Likes Python
merged_string: ILCMLP
Summary: In this assignment, you have understood the application and implementation of Strings concept for the given computational problem.
Objective: To understand the operations that can be performed on Tuples through a quiz
Problem Description: Assume,
head = ("CEO",)
elements = ('Air', 'Water', 'Fire', 'Light', 'Land')
Predict the output of following statements:
Q1: print(head)
Q2: print(elements)
Q2: print(elements[3])
Q3: elements[0]='Ice'
Q5: print(elements[-1])
Q6: print(elements[4])
Q7: print(elements[5])
Summary of this assignment: In this assignment, you have revisited concepts of tuples through code snippets
There's meant to be 2 errors in this code in line 10 & 12 , however you won't be able to see the error of 12th line for that you need to remove line 10 to see it.
Line 10 - IndexError: tuple index out of range
Line 12 - TypeError: 'tuple' object does not support item assignment
Objective: Given a List of elements representing a computational problem, be able to provide solution by performing required operations using data structures like tuple from an object oriented language (Python) using Eclipse IDE
Problem Description: Consider the list of courses opted by a Student “John” and available electives as a part of Student Management System.
courses = (“Python Programming”, “RDBMS”, “Web Technology”, “Software Engg”).
electives = (“Business Intelligence”, “Big Data Analytics”)
Write a Python Program to satisy following business requirements: a. List the number of courses opted by Student by “John” b. List all the courses opted by Student “John”. c. Students “John” is also interested in elective course mentioned above. Print the updated tuple including electives d. Check whether Student “John” is allowed to change his course from “Software Engg” to “Computer Networks”. If yes, print the updated course list else mention the reason for the same.
Summary of this assignment: In this assignment, you have learnt the implementation of Tuple operations for given business scenario.
Objective: Given a List of elements representing a computational problem, be able to access elements in different ways using an object oriented language (Python) using an IDE
Problem Description: Assume,
language = ['Python']
languages = ['Python', 'C', 'C++', 'Java', 'Perl']
Predict the output of following statements:
Q1: print(language)
Q2: print(languages)
Q3: print(languages[0:3])
Q4: print(languages[1:4])
Q5: print(languages[2])
Q6: print(languages[5])
Q7: print (languages[0] + " and " + languages[1] + " are quite different!")
Q8: print ("Accessing the last element of the list: " + languages[-1])
Summary of this assignment: In this assignment, you have revisited concepts of lists through code snippets
Objective: Given a computational problem, be able to use the right data structures (lists and strings) and implement the solution to the problem and test using a set of values in an IDE
Problem Description: Write a Python program to generate first ‘n’ Fibonacci numbers. Store the generated Fibonacci numbers in a list and display it.
Summary: In this assignment, you have understood the application and implementation of Lists concept for the given computational problem.
Objective: Given a List of elements representing a computational problem, be able to sort the elements in ascending/descending order using an object oriented language (Python) using an IDE
Problem Description: You have a bundle of currency of varied denominations. You want to arrange them in descending order. Given below is one approach to perform the above operation.
Algorithm: Bubble Sort (List of N element)
Input: A List of N elements to be sorted
Summary: In this assignment, you have understood the application and implementation of Lists concept for the given computational problem
Objective: Given a computational problem, Implement the solution for the problem using suitable data structures from an object oriented language (Python) using an IDE
Problem Description: ABC Retail Store sells different varieties of Furniture to the customers. The list of furnitures available and its cost list are given below:
| Furniture | Cost in Rs. |
|---|---|
| Sofa set | 20,000 |
| Dining table | 8,500 |
| T.V. Stand | 4,599 |
| Cupboard | 13,920 |
Objective: Given a Set of elements representing a computational problem, be able to perform different operations using an object oriented language (Python) using an IDE
Problem Description: Consider the sets,
fruits = {"apple", "orange", "banana", "apple", "pear", "papaya", "papaya"}
fruit_basket = {"apple", "banana", "grapes", "mango", "kiwi"}
Predict the output of following statements:
Q1: print(fruits)
Q2: print(fruits & fruit_basket)
Q3: print(fruits | fruit_basket)
Q4: print(fruits - fruit_basket)
Q5: print(fruits ^ fruit_basket)
Q6: print(len(fruit_basket))
Q7: print("pear" in fruits)
Q8: print("pear" not in fruit_basket)
Q9: print(fruits.issubset(fruit_basket))
Q10: print(fruits.issuperset(fruit_basket))
Q11: print(fruit_basket.copy())
Summary of this assignment: In this assignment, you have revisited concepts of Sets through code snippets
Objective: Given a Set of elements representing a computational problem, be able to provide solution by performing required operations on sets from an object oriented language (Python) using an IDE
Problem Description: Consider the scenario from course in student management system. Given below are 2 Sets representing the names of students enrolled for a particular course.
java_course = {“John”, “Jack”, “Jill”, “Joe”}
python_course = {“Jake”, “John”, “Eric”, “Jill”}
Write a Python program to satisy below mentioned business requirements: a. List the number of Students enrolled for Python course b. List the names of Students enrolled for Java course only c. List the names of Students enrolled for Python course only d. List the number and names of Students enrolled for both Java and Python courses e. List the number and names of Students enrolled for either Java or Python courses but not both f. List names and number of Students enrolled for either Java or Python courses
Summary of this assignment: In this assignment, you have learnt the implementation of Set operations for given business scenario.
Objective: Given a Dictionary of elements representing a computational problem, be able to perform different operations using an object oriented language (Python) on Eclipse IDE
Problem Description: Given below is a Dictionary customer_details representing customer Details from Retail Application - Customer Id is key and Customer Name is value.
customer_details = { 1001 : "John", 1004 : "Jill", 1005: "Joe", 1003 : "Jack" }
Write Python code to perform below mentioned operations: a. Print details of Customers b. Print number of Customers c. Print Customer names in ascending order d. Delete the details of customer with customer id = 1005 and print updated dictionary e. Update the name of customer with customer id = 1003 to “Mary” and print updated dictionary f. Check whether details of customer with customer id 1002 exists in the dictionary.
Summary of this assignment: In this assignment, you have learnt the implementation of Dictionary operations for given business scenario.
Objective: Given a computational problem, select the right set of data structures (lists and dictionary) and implement the solution to problem and test using a set of values in an IDE
Problem Description: Consider the scenario of processing marks of students for a course in student management system. Given below is the list of marks scored by students. Find top three scorers for the course and also display average marks. Implement the solution for given business scenario.
| Student Name | Marks Scored |
|---|---|
| John | 86.5 |
| Jack | 91.2 |
| Jill | 84.5 |
| Harry | 72.1 |
| Joe | 80.5 |
Summary: In this assignment, you have understood the application and implementation of Dictionary concept for the given computational problem.
Objective: Given a computational problem, implement functions and solve it using parameter passing technique followed in python
Problem Description: Consider the distance in miles between two locations: distance between Phoenix, Arizona and Salt Lake City, Utah in USA distance between Phoenix, Arizona and Tampa, Florida in the US.
We want to compare the distances and check which one is far off from Phoenix, Arizona.
Provided below are codes written to solve the above problem using pass by reference technique – using Required arguments and Keyword Arguments.
Code:
Method 1: Pass by Reference – Required Arguments
def compare(phoenix_to_slc, phoenix_to_tampa):
if phoenix_to_slc > phoenix_to_tampa:
print("SLC is far from Phoenix compared to Tampa, Florida")
elif(phoenix_to_slc < phoenix_to_tampa):
print("Tampa, Florida is far from Phoenix compared to SLC")
else:
print("Both locations are equidistance from Phoneix")
compare(1790,506)
Method 2: Pass by Reference – Keyword Arguments
def compare(phoenix_to_slc, phoenix_to_tampa):
if phoenix_to_slc > phoenix_to_tampa:
print("SLC is far from Phoenix compared to Tampa, Florida")
elif(phoenix_to_slc < phoenix_to_tampa):
print("Tampa, Florida is far from Phoenix compared to SLC")
else:
print("Both locations are equidistance from Phoneix")
compare (phoenix_to_tampa = 506, phoenix_to_slc = 1790)
Output:
SLC is far from Phoenix compared to Tampa, Florida
Summary of this assignment: In this assignment, you have learnt the implementation of functions and parameter passing technique - pass by reference through keyword arguments and reference arguments
Objective: Given a computational problem, implement functions and solve it using appropriate parameter passing techniques (pass by reference)
Problem Description: At an airport, a traveler is allowed entry into the flight only if he clears the following checks i. Baggage Check ii. Immigration Check iii. Security Check
The logic for the check methods are given below:
Implementation details
Check if baggage_amount is greater than or equal to 0 and less than or equal to 40.
if baggage_amount is VALID
return TRUE
else
return FALSE
Check if expiry_year is greater than or equal to 2001 and less than or equal to 2025.
if expiry_year is VALID
return TRUE
else
return FALSE
if noc_status is TRUE
return TRUE
else
return FALSE
In traveler() function, initialize the traveler Id and traveler name and invoke the functions check_baggage(), check_immigration() and check_security() by passing required arguments. Refer the table below for values of arguments.
| Variable | Value |
|---|---|
| traveler_id | 1001 |
| traveler_name | Jim |
| baggageAmount | 35 |
| expiryDate | 2019 |
| nocStatus | true |
if all values of check_baggage(), check_immigration() and check_security() are true, diplay traveler_id and traveler_name
display “Allow Traveller to fly!”
else
display traveler_id and traveler_name
display “Detain Traveller for Re-checking!”
Summary of this assignment: In this assignment, you have learnt pass by reference technique
Objective: Revisit String built-in functions through match the following. Problem Description: There are many built-in String methods available in Python. Match each method to what it does.
| Method | What the method does |
|---|---|
| text.endswith(“.jpg”) | Return a copy of the string with all occurences of one substring replaced by another |
| text.upper() | Return a copy of the string converted to lowercase |
| text.lower() | Return the value True if the string has the given substring at the beginning |
| text.replace(“tomorrow”, “Saturday”) | Return the value True if the string has the given substring at the end |
| text.strip() | Returns the first index value when the given substring is found |
| text.find(“python”) | Return a copy of the string with the leading and trailing whitespace removed |
| Text.startswith(“”) | Return a copy of the string converted to uppercase |
ANSWERS:
| Method | What the method does |
|---|---|
| text.endswith(“.jpg”) | Return the value True if the string has the given substring at the end |
| text.upper() | Return a copy of the string converted to uppercase |
| text.lower() | Return a copy of the string converted to lowercase |
| text.replace(“tomorrow”, “Saturday”) | Return a copy of the string with all occurences of one substring replaced by another |
| text.strip() | Return a copy of the string with the leading and trailing whitespace removed |
| text.find(“python”) | Returns the first index value when the given substring is found |
| Text.startswith(“”) | Return the value True if the string has the given substring at the beginning |
Summary of this assignment: In this assignment, you have revisited String built-in functions through match the following.
Objective: Given a computational problem, select the right set of data structures (lists and dictionary) and implement the solution to problem and test using a set of values in an IDE
Problem Description: Consider the price list of various items in the Retail Store. Customer John wants to know the i) Price of Costliest item sold in Retail store ii) Average price of items in the Retail store iii) Display of item price list in increasing order
Implement the solution using user-defined and built-in functions to accomplish above mentioned business requirement.
Code:
item_price = [1050, 2200, 8575, 485, 234, 150, 399]
def price_max(item_price):
print("Price of Costliest item in the Retail Store: ",max(item_price))
def average_price(item_price):
total_price = 0
for i in item_price:
total_price += i
average_price = total_price/len(item_price)
print("Average Price of items in the Retail Store: ",average_price)
def display_sorted_price(item_price):
item_price.sort()
print("Item Price List in increasing order: ",item_price)
price_max(item_price)
average_price(item_price)
display_sorted_price(item_price)
Output:
Price of Costliest item in the Retail Store: 8575
Average Price of items in the Retail Store: 1870.4285714285713
Item Price List in increasing order: [150, 234, 399, 485, 1050, 2200, 8575]
Summary: In this assignment, you have understood the application and implementation of Lists concept for the given computational problem.
Objective: Given a computational problem, implement the solution to the given problem using exception handling.
Problem Description: Consider the customer ids of a customer in the Retail Store. Customer id can be vary between 1001 to 1005. Store the customer id in a list and handle appropriate exceptions for the following: i) Store the customer id “1002” as string ii) Print customerid[5]
Objective: Given a business scenario, able to identify the classes and objects
Problem Description: A supermarket wants to automate the system of purchase of items by customers and the billing process. The automation involves the maintenance of items, employees, customers, purchase of items by customer and billing of items. Customers can be regular visitors to the store in which case they are eligible for discounts based on the bill amount. The customers can also be privileged ones, wherein they are given membership cards (Platinum, Gold and Silver). Such customers are eligible for gifts based on the type of membership card. The billing staff does the billing and delivery of items to the customer. The bill calculation involves the logic of computation of the bill depending on customer type. The customer can pay the bill through credit card or cash. In the former case, two percent processing charge is applicable. Sales tax is also applicable on the final bill amount. Employees in that supermarket can be permanent and temporary. Permanent employees will get additional benefits in salary.
Questions
Identify the classes. Identify the attributes / behaviors associated with each class.
Summary of this assignment: In this assignment, you have revisited object oriented concepts using scenarios
Objective: Revisit object oriented concepts using a quiz
Answer the following questions:
1. In the ATM machine, the customer chooses the operations using a touch screen. The customer need not know the internal working of the ATM machine. Which OO concept(s) can be used in this scenario?
2. Consider the following statement: “Vehicles can be of two types viz. Water vehicles and Land vehicles “. Which OO concept may be used to represent this scenario?
3. As part of our family trip plan we went to Zoo. My son asked me lot of questions I tried my level best to answer all of his questions. I showed him different types of monkeys which were locked in different rooms. He asked me, “Dad, you said all are monkeys then why they are kept in different rooms?” Now, which OO concept may be used to represent this scenario?
Summary of this assignment: In this assignment, you have revisited object oriented concepts using scenarios
Objective: Revisit object oriented concepts using a simple True/False questions
Answer the following questions:
1. Wrapping up of data of different types into a single unit is known as encapsulation.
2. Inheritance means the ability to reuse the data values of one object by other objects.
3. Polymorphism is extensively used in implementing inheritance.
4. Object-oriented systems can scale up better from small to large
5. Object-based languages do not support inheritance and dynamic binding.
Summary of this assignment: In this assignment, you have revisited object oriented concepts using simple true/false questions
Objective: Given a business scenario, be able to identify the components of a use case diagram
Problem Description: Refer to the course registration system case study and answer the following questions.
Situation: A Course Registration System needs to be developed for an engineering college. The college wants an automated system to replace its manual system for the purpose of registration of students to branches and calculation of fees for each year. The engineering college provides graduation courses in various branches of engineering. The system will be used by the admin staff to register students admitted to the college to the branches at the time of joining the college and also to calculate the yearly fees for the students. The student has to register every year for the next academic year. The Admin takes care of the yearly registration of the students and the calculation of yearly fees. The system needs to be authenticated with a login id and password. Registration of a student to a branch is based on the qualifying exam marks and the entrance counseling. For every branch, a yearly branch fee is applicable. Discounts are given to the branch fees of the first year based on the qualifying exam marks. There is a registration fees also applicable to the first year students. Students can opt to be a day scholar or hostelite. Yearly bus fees are applicable for all the day scholars based on the distance of travel. Yearly hostel fees are applicable for all the hostelites. Yearly infrastructure fees and library fees are also applicable to all the students. Admin calculates the yearly college fees for each student and the college fees include all the fees specified earlier based on the type of student. Admin will provide a printed receipt of the fees to the students once the annual college fees have been paid. At the time of registration, student has to provide the permanent address and in case the student is opting to be a day scholar, he/she has to provide the residential address also. Assumption:
- Decision of the branch of study a student is allocated, is not within the scope of this case study
Questions:
1. Identify all the classes of the course registration system
2. Identify the attributes and behaviors of those classes as well.
3. Draw the complete class diagram using the information collected.
Summary of this assignment: In this assignment, you have learnt how to actors and activities of a use case diagram using a course registration system scenario
Objective: Given a class diagram for a use case representing a computational problem, be able to recognize the three compartments of the class diagram and implement it using an object oriented language (Python) using an IDE
Problem Description: In the retail application, there are many customers who visit the retail outlet to purchase various items. The manager of the retail outlet now wants to keep track of all its customers’ data. Let us assume that customer details include Customer Id and Telephone Number.
For the class diagram identified in OO Fundamentals, implement the class using Eclipse IDE and execute it by writing a starter class.
Code: Execute the code using Eclipse IDE with the given inputs and understand the following:
Access Specifiers
Variables – Local and Instance variables
Methods
Starter class
Creation of objects
Reference variables
Compilation and Execution of a python program
class Customer:
def setcustomerid(self, id1):
self.__customerid = id1
def settelephoneno(self, teleno):
self.__telephoneno = teleno
def getcustomerid(self):
return self.__customerid
def gettelephoneno(self):
return self.__telephoneno
custobj = Customer()
custobj.setcustomerid(1001,)
custobj.settelephoneno(9201861311)
print("Customer Id : ", custobj.getcustomerid())
print("Telephone No : ", custobj.gettelephoneno())
Summary of this assignment: In this assignment, you have understood object oriented fundamentals - Access Specifiers, Variables – Local and Instance variables.
Objective: Given a class diagram for an use case representing a computational problem, use the ‘self’ reference to create and initialize instance variables of a class and test using a set of values in an IDE
Problem Description: Let us revisit the class diagram drawn and implemented for Customer class as part of Object Oriented Fundamentals.
Class diagram:
| Customer |
|---|
| -customerid : int |
| -telephoneno : long |
| --- |
| +setcustomerid(int) : void |
| +getcustomerid() : int |
| +settelephoneno(long) : void |
| +gettelephoneno() : long |
Code: Execute the code using Eclipse IDE with the given inputs and observe the results.
class Customer:
def setcustomerid(self, customerid):
customerid = customerid
def settelephoneno(self, teleno):
telephoneno = teleno
def getcustomerid(self):
return customerid
def gettelephoneno(self):
return telephoneno
custobj = Customer()
custobj.setcustomerid(1001)
custobj.settelephoneno(9201861311)
print("Customer Id : ", custobj.getcustomerid())
print("Telephone No : ", custobj.gettelephoneno())
Note: Without ‘self’, it will be considered as normal local variable and that will be removed at the end of the scope of method. Hence, it is not possible to access it from outside of the method where it is defined.
Revised Code
class Customer:
def setcustomerid(self, customerid):
self.customerid = customerid
def settelephoneno(self, teleno):
self.telephoneno = teleno
def getcustomerid(self):
return self.customerid
def gettelephoneno(self):
return self.telephoneno
custobj = Customer()
custobj.setcustomerid(1001)
custobj.settelephoneno(9201861311)
print("Customer Id : ", custobj.getcustomerid())
print("Telephone No : ", custobj.gettelephoneno())
Note: “self” is not a keyword and has no special meaning in Python. We can use any name in that place. However, it is recommended not to use any name other than “self” (merely a convention and for readability)
Summary of this assignment: In this assignment, you have learnt the usage of self reference for accessing the instance variables using a retail application scenario
Objective: Observe the need for features in the retail application scenario to correlate the application of initializing the members and ‘static’ members
Problem Description: In the retail application, each time a customer is registered, customer id must be automatically generated starting from 1001 and the details of the customer must be initialized. Also, retail shop management wants to know how many customers have registered at a point of time.
Answer the following question:
What do you think is needed to implement the solution for the above problem?
Summary of this assignment: In this assignment, you have learnt
The need of __init__() method and static keyword in the retail application scenario
Objective: Given a class diagram for a use case representing a computational problem, initialize the data members using init() method and test using a set of values in an IDE
Problem Description: In the retail application, as a customer is registered to the retail shop, the details of the customer must also be initialized.
Class diagram:
| Customer |
|---|
| -customerid : int |
| -telephoneno : long[] |
| -customername : String |
| --- |
| + setcustomerid(int) : void |
| +getcustomerid() : int |
| +settelephoneno(long[]) : void |
| +gettelephoneno() : long[] |
| +setcustomername(String) : void |
| +getcustomername() : String |
| +validatecustomername() : boolean |
Code: Execute the code using Eclipse IDE with the given inputs and observe the results.
class Customer:
def __init__(self, customerid, telephoneno, customername):
self.__customerid=customerid
self.__customername=customername
self.__telephoneno=telephoneno
def setcustomerid(self, id):
self.__customerid = id
def setcustomername(self, customername):
self.__customername = customername
def settelephoneno(self, teleno):
self.__telephoneno = teleno
def getcustomerid(self):
return self.__customerid
def gettelephoneno(self):
return self.__telephoneno
def getcustomername(self):
return self.__customername
def validatecustomername(self):
if(len(self.__customername)>=3 and len(self.__customername) <=20):
return True
else: return False
telephoneno=[9201861311, 9201861321, 9201661311]
custobj = Customer(1001, telephoneno, "Kevin")
if(custobj.validatecustomername()):
print("Customer Id : ", custobj.getcustomerid())
temp = custobj.gettelephoneno()
print("Telephone Nos : ", temp[0], ",", temp[1], ",", temp[2])
print("Customer Name : ", custobj.getcustomername())
else:
print("Invalid customer name. Customer name must be between 3 and 20 characters")
Points to keep in mind
1. There is no default __init()__ method in Python as like we have default constructor in Java. Hence, we have to initialize some value to the variable if we want to use it in the program later.
2. No…Values initialized for each customer must be different. It depends on each customer. This can be achieved using parameterized __init__()
Summary of this assignment: In this assignment, you have understood the implementation of init() method and the need of parameterized init() using a retail application scenario.
Objective: Given a class diagram for a use case representing a computational problem, initialize the data members using default constructors, parameterized init() and test using a set of values in an IDE
Problem Description: In the retail application, as a customer is registered to the retail shop, the details of the customer must also be initialized.
The class diagram discussed in Object Oriented Fundamentals Assignment 51 has been modified as shown below.
Class diagram:
| Customer |
|---|
| -customerid : int |
| -telephoneno : long[] |
| -customername : String |
| --- |
| + Customer(int, long[], String) |
| + setcustomerid(int) : void |
| +getcustomerid() : int |
| +settelephoneno(long[]) : void |
| +gettelephoneno() : long[] |
| +setcustomername(String) : void |
| +getcustomername() : String |
| +validatecustomername() : boolean |
Code: Execute the code using Eclipse IDE with the given inputs in the starter class, Retail and observe the results.
class Customer:
def __init__(self, customerid, telephoneno, customername):
self.__customerid=customerid
self.__customername=customername
self.__telephoneno=telephoneno
def setcustomerid(self, id):
self.__customerid = id
def setcustomername(self, customername):
self.__customername = customername
def settelephoneno(self, teleno):
self.__telephoneno = teleno
def getcustomerid(self):
return self.__customerid
def gettelephoneno(self):
return self.__telephoneno
def getcustomername(self):
return self.__customername
def validatecustomername(self):
if(len(self.__customername)>=3 and len(self.__customername) <=20):
return True
else:
return False
telephoneno=[9201861311, 9201861321, 9201661311]
custobj = Customer(1001, telephoneno, "Kevin")
if(custobj.validatecustomername()):
print("Customer Id : ", custobj.getcustomerid())
temp = custobj.gettelephoneno()
print("Telephone Nos : ", temp[0], ",", temp[1], ",", temp[2])
print("Customer Name : ", custobj.getcustomername())
else:
print("Invalid customer name. Customer name must be between 3 and 20 characters")
Summary of this assignment: In this assignment, you have understood the implementation of parameterized init() method and the need of parameterized init() using a retail application scenario.
Objective: Given a class diagram for a use case representing a computational problem, use static/class variable and test using a set of values in an IDE
Problem Description: In the retail application, each time a customer is registered, customer id must be automatically generated starting from 1001. Also, retail shop management wants to know how many customers have registered at a point of time.
Note: Few instance variables are not shown in the class diagram so as to keep the code simple to understand.
Class diagram:
| Customer |
|---|
| -customerid : int |
| --- |
| +Customer() |
| +setcustomerid(int) : void |
| +getcustomerid() : int |
| +totalnoofcustomers() : int |
Code: Execute the code using Eclipse IDE with the given inputs in the starter class, Retail and observe the results.
class Customer:
counter = 1000
def __init__(self):
Customer.counter = Customer.counter+1
self.__customerid=Customer.counter
def setcustomerid(self, cid):
self.__customerid=cid
def getcustomerid(self):
return self.__customerid
@staticmethod
def totalcustomers():
return Customer.counter-1000
objcust = Customer()
print("Customer Id: ", objcust.getcustomerid())
objcust2 = Customer()
print("Customer Id: ", objcust2.getcustomerid())
print("Total Customers: ", objcust.totalcustomers())
print("Total Customers: ", objcust2.totalcustomers())
print("Total Customers: ", Customer.totalcustomers())
Note: customerId is an instance variable of Customer class and it will be created separately for each and every object of Customer class. Hence each time an object of Customer class is created, constructor is called and customerId will be initialized to 1000 and will be incremented by 1 in the constructor as a result for all the objects customerId will remain as 1001. Hence we need to have a variable common to all the objects of Customer class
Summary of this assignment: In this assignment, you have understood the implementation of instatnce methods and static methods.
Objective: Observe the need for features in the retail application scenario to correlate the application of method overloading
Problem Description: The Retail Store has the requirement for printing many reports including the bill. All reports contain header. The header may be
a line containing a character printed 70 times or
a title of a report or
a line containing a character specified number of times
Answer the following questions:
1. Which object oriented concept do you think is needed to implement this scenario?
Summary of this assignment: In this assignment, you have understood the need of method overloading using a retail application scenario
Objective: Given a class diagram for a use case representing a computational problem, use method and constructor overloading techniques to solve the problem and test using a set of values in an IDE
Problem Description: The scenario discussed in OO Concepts Part I Assignment 1 is revisited here. The Retail Store has the requirement for printing many reports including the bill. All reports contain header. The header may be
a line containing a character printed 70 times or
a title of a report or
a line containing a character specified number of times
A new class called PrintDetails with overloaded methods have to be created as shown below:
| PrintDetails |
|---|
| +printHeader (char c): void |
| +printHeader (char c,int no): void |
| +printHeader (String c): void |
Code: Execute the code using Eclipse IDE with the given inputs in the starter class, Retail and observe the results.
class PrintDetails:
def printheader(self, c='*', no=1):
print(c * no)
obj = PrintDetails()
obj.printheader('#', 10)
obj.printheader("Report")
obj.printheader('#' ,10)
obj.printheader()
Summary of this assignment: In this assignment, you have learnt the need and implementation of method with default parameters using a retail application scenario.
Objective: Observe the need for features in the retail application scenario to correlate the application of relationships concept Problem Description:
- The retail shop has two types of customers, Regular and Privileged. a. What are the properties common to all Customers? b. What are the properties which are different for the two kinds of customers? c. What is the relationship between i. Customer and Regular customer ii. Customer and Privileged customer? d. How can this relationship be represented using class diagram?
Note: Regular customers are entitled to get some discount on each purchase apart from having all the properties of a customer. On the other hand, privileged customers hold membership card – Platinum, Gold or Silver based on which they receive gifts on each purchase. This is in addition to having all the properties of a customer. Thus in this case, Customer is the generalized case and Regular and Privileged customer are the specialized cases of Customer
- The retail store management wants to keep track of the address of every customer so as to allow for home delivery at a later point of time. a. How many fields represent the address? b. Do you think address qualifies to be a class? c. What do you think is the relationship between Customer and Address? d. How can this relationship be represented using class diagram?
Note: Address can be considered as a separate class since the same class if required can be reused at a later point of time. For example, if retail store needs to keep track of its employees address, the same address class can be reused. The relationship between Customer class and Address class will be “Has –A” relationship since every customer has an address.
- Consider PurchaseBill and PrintDetails classes, the bill needs to be created in a particular format. PrintDetails class contains methods which can be used to display the bill in the required format. a. What do you think is the relationship between PurchaseBill and PrintDetails classes? b. How can this relations
Note: As stated, PrintDetails class contains methods which can be used to display the bill in the required format. Hence the relationship between PurchaseBill and PrintDetails class is “uses-a” relationship
Summary of this assignment: In this assignment, you have understood the need of relationships and its representation using a retail application scenario
Objective: Given a class diagram for a use case representing a computational problem, implement inheritance (single level, multilevel and hierarchical) to solve the problem, trace the flow of the program between the base and derived classes and test using a set of values in an IDE and recognize the benefits of inheritance
Problem Description: In the retail application, we have already seen that customers are of two types – Regular and Privileged. Regular customers are entitled for discount on each purchase and Privileged customers hold membership cards – Platinum, Gold or Silver based on which they are entitled to get gifts on each purchase.
The class diagram presented to you as part of OO Concepts Part I Assignment 5 has been modified to represent the inheritance relationship.
Note: Few instance variables and methods are not shown in the class diagram so as to keep the code simple to understand.
Code: Execute the code using Eclipse IDE with the given inputs in the starter class, Retail and observe the results.
class Customer:
def __init__(self, id1=0, name=None):
self.__customerid=id1
self.__customername=name
def setcustomerid(self, id1):
self.__customerid = id1
def setcustomername(self, name):
self.__customername=name
def getcustomerid(self):
return self.__customerid
def getcustomername(self):
return self.__customername
class RegularCustomer(Customer):
def __init__(self, id1=0, name=None, dis=0):
super().__init__(id1,name)
self.__discount=dis
def setdiscount(self, dis):
self.__discount=dis
def getdiscount(self):
return self.__discount
class PrivilegedCustomer(Customer):
def __init__(self, id1=0, name=None, card=None):
super().__init__(id1,name)
self.__memcardtype=card
def setmemcardtype(self, card):
self.__memcardtype=card
def getmemcardtype(self):
return self.__memcardtype
objr = RegularCustomer()
print("Regular Customer Details")
print("Customer Id: ", objr.getcustomerid())
print("Customer Name: ", objr.getcustomername())
print("Discount Eligible: ", objr.getdiscount())
print("*********")
objp = PrivilegedCustomer()
print("Regular Customer Details")
print("Customer Id: ", objp.getcustomerid())
print("Customer Name: ", objp.getcustomername())
print("Discount Eligible: ", objp.getmemcardtype())
print("*********")
objr = RegularCustomer()
objr.setcustomerid(1001)
objr.setcustomername('Ram')
objr.setdiscount(10.0)
print("Regular Customer Details")
print("Customer Id: ", objr.getcustomerid())
print("Customer Name: ", objr.getcustomername())
print("Discount Eligible: ",
objr.getdiscount())
print("*********")
objp = PrivilegedCustomer()
objp.setcustomerid(1002)
objp.setcustomername("Seetha")
objp.setmemcardtype("Gold")
print("Regular Customer Details")
print("Customer Id: ", objp.getcustomerid())
print("Customer Name: ", objp.getcustomername())
print("Discount Eligible: ", objp.getmemcardtype())
Note: Instance variables can be initialized at object creation using init()
Summary of this assignment: In this assignment, you have understood implementation of inheritance relationship and use of super() invocation to invoke parent class init() using a retail application scenario.
Objective: Revisit inheritance concepts through a quiz Q1. What is the output of the following code snippet?
class Base:
def __init__(self):
print("Parent init invoked")
class Derived(Base):
def __init__(self):
print("Derived init invoked")
obj = Derived()
Q2. What is the output of the following code snippet?
class Base:
def __init__(self, v):
self.baseVar = v
self.var=0
print("Base Class init invoked")
class Der(Base):
def __init__(self, v):
super().__init__(v)
self.derVar=v
self.var=0
print("Derived class init invoked")
def display(self):
print("Base variable value: ", self.baseVar)
print("Derived variable value: ", self.derVar)
def useOfSuper(self):
self.var=15
print("Base Variable Value -> ", Base.var)
print("Derived Variable Value -> ", self.var)
d = Der(10)
d.display()
d.useOfSuper()
Q3. What is the output of the following code snippet?
class Base:
def __init__(self, v):
self.baseVar = v
print("Base Class init invoked")
class Der(Base):
def __init__(self, v):
self.derVar=v
print("Derived class init invoked")
def display(self):
print("Base variable value: ", self.baseVar)
print("Derived variable value: ", self.derVar)
d = Der(10)
d.display()
Q4. What is the output of the following code snippet?
class Base:
def __init__(self, v):
self.baseVar = v
print("Base Class init invoked")
class Der(Base):
def __init__(self, v):
self.derVar=v
print("Derived class init invoked")
def display(self):
print("Base variable value: ", self.baseVar)
print("Derived variable value: ", self.derVar)
d = Der(10)
d.display()
Q5. Say true or false a) Multilevel inheritance is not supported in Python b) Inheritance can be done with the help of passing the base class to derived class in Python c) In derived class init() method, ‘super’ should be the first statement d) All the private data members of the base class are directly accessible in the derived class
Summary of this assignment: In this assignment, you have revisited concepts of inheritance through code snippets
Objective: Given a class diagram for a use case representing a computational problem, implement has-a and uses-a relationships to solve the problem and test using a set of values in an IDE and recognize the benefits of the mentioned relationships
Problem Description: In the retail application, we have already seen that every customer has an address. Address consists of address line, city, state and zipcode.
The class diagram presented to you as part of aggregation (has-a) example in OO Concepts Part I Assignment 7 has been modified.
Note: Few instance variables and methods are not shown in the class diagram so as to keep the code simple to understand. Similarly, regular and privileged customer classes are also not shown here.
Code: Execute the code using Eclipse IDE with the given inputs in the starter class, Retail and observe the results.
class Address:
def __init__(self, addressline, city, state, zip1):
self.__addressline = addressline
self.__city=city
self.__state=state
self.__zip=zip1
def setaddressline(self, address):
self.__addressLine = address
def getaddressline(self):
return self.__addressline
def setcity(self, city):
self.__city = city
def getcity(self):
return self.__city
def setstate(self, state):
self.__state = state
def getstate(self):
return self.__state
def setzip(self, zip1):
self.__zip = zip1
def getzip(self):
return self.__zip
class Customer:
def __init__(self, cid, address):
self.__customerid = cid
self.__address = address
def getcustomerid(self):
return self.__customerid
def getaddress(self):
return self.__address
objaddress = Address("No.333,Oak street", "Strathfield", "New South Wales", "570018")
objcust = Customer(1001, objaddress)
print("Customer Id:", objcust.getcustomerid())
address = objcust.getaddress()
print("Customer Address: ", address.getaddressline(), ",", address.getcity(), ",", address.getstate(), ",", address.getzip())
Note: In this example, Address reference is passed to the __init() of Customer class. Since it is a reference of an object that is passed, the parameter passing technique used is pass by referene.
Summary of this assignment: In this assignment, you have understood the implementation of aggregation relationship using a retail application scenario.
Objective: Given a class diagram for a use case representing a computational problem, implement has-a and uses-a relationships to solve the problem and test using a set of values in an IDE and recognize the benefits of the mentioned relationships
Problem Description: In the retail application, we have already seen that purchase bill has to be created in a particular format.
The class diagram presented to you as part of association (uses-a) example in OO Concepts Part I Assignment 7 has been modified to include instance variables and methods
Note: Few instance variables and methods are not shown in the class diagram so as to keep the code simple to understand.
Code: Execute the code using Eclipse IDE with the given inputs in the starter class, Retail and observe the results. Few changes are made to PurchaseBill class, the changes are highlighted in the code below:
class PrintDetails:
def printheader(self, c, no=1):
print(c*no)
class PurchaseBill:
def __init__(self, bid, billamount):
self.__billid = bid
self.__billamount = billamount
def getbillid(self):
return self.__billid
def getbillamount(self):
return self.__billamount
def calculatebill(self, mode, processcharge):
if(mode=="Credit"):
self.__billamount = self.__billamount + (self.__billamount * processcharge/100)
def displaybill(self):
objprint = PrintDetails()
objprint.printheader("-", 80)
objprint.printheader(" Easy Shop Retail Store Bill ")
objprint.printheader("-", 80)
print("Bill Id: ", self.__billid)
print("Final amount to be paid: Rs.", self.__billamount)
objprint.printheader("-", 80)
objprint.printheader(" Thank You!!! ")
objprint.printheader("-", 80)
objpur = PurchaseBill(101, 1055.0)
objpur.calculatebill("Credit", 10.5)
objpur.displaybill()
Summary of this assignment: In this assignment, you have understood the implementation of association relationship using a retail application scenario.
class customer:
counter = 1000 #class variable
def __init__(self, telephoneno, customername, add):
customer.counter += 1
self.__customerid=customer.counter
self.__customername=customername
self.__telephoneno=telephoneno
self.__address = add
def setcustomerid(self, cid):
self.__customerid = cid
def settelephoneno(self, teleno):
self.__telephoneno = teleno
def getcustomerid(self):
return self.__customerid
def gettelephoneno(self):
return self.__telephoneno
def getcustomername(self):
return self.__customername
def getaddress(self):
return self.__address
@staticmethod
def gettotalcustomer():
return customer.counter-1000
class regularcustomer(customer):
def __init__(self, telephoneno, customername, discount, add):
# super to invoke baseclass init
super().__init__(telephoneno, customername, add)
self.__discount = discount
def setdiscount(self, dis):
self.__discount = dis
def getdiscount(self):
return self.__discount
class address:
def __init__(self, add):
self.__addressline = add
def setaddress(self, add):
self.__addressline = add
def getaddress(self):
return self.__addressline
regcustadd1 = address("No.22,Vijay Nagar Mysore Karnataka 570018")
teleno=[9201861311, 9201861321, 9201661311]
regcustobj1 = regularcustomer(teleno, "John", 12.5, regcustadd1)
#custobj1.setcustomerid(1001)
#custobj1.settelephoneno(1234567890)
print("Customer id:", regcustobj1.getcustomerid())
print("Telephone no:", regcustobj1.gettelephoneno())
print("Customer name:", regcustobj1.getcustomername())
print("Discount:", regcustobj1.getdiscount())
#temp1 = regcustobj1.getaddress().getaddress()
print("Customer's address:", regcustobj1.getaddress().getaddress())
print("\n")
regcustadd2 = address("No.33,J.P. Nagar Bangalore Karnataka 570011")
teleno1 = [1122334455, 1199887766, 2244668897]
regcustobj2 = regularcustomer(teleno1, "Mary", 15.5,regcustadd2)
print("Customer id:", regcustobj2.getcustomerid())
print("Telephone no:", regcustobj2.gettelephoneno())
print("Customer name:", regcustobj2.getcustomername())
print("Discount:", regcustobj2.getdiscount())
print("Customer's address:", regcustobj2.getaddress().getaddress())
print("\n")
print("Total customers registered:", customer.gettotalcustomer())