🛠️ Ongoing project of extra Python utilities including implementation of lazy property, collections of common regular expressions, ...
A simple use of lazy_property:
from xpyutils import lazy_property
import random
random.seed(42)
class Person:
def __init__(self, name: str) -> None:
self._name = name
@property
def name(self) -> str:
"""Name of the person.
"""
return self._name
@lazy_property
def lucky_number(self) -> int:
"""Lucky number.
"""
return random.randint(0, 100)
@lazy_property.require_presence()
def age(self) -> int:
"""Age.
"""
return random.randint(20, 30)
person = Person('Isaac')
print(person.lucky_number) # 81
print(person.lucky_number) # it is still 81
try:
person.age
except Exception as e:
print(e) # property 'age' is not present yet