networkId in caffe_app/consumers.py undefined when modifying parameters of layers

Currently, I'm trying to build NN by myself using Ubuntu16.04 in VMware, but I encountered a problem when I try to modify the parameters of the Input layer. The information says the variable 'networkId' is undefined in function 'ws_receive' in caffe_app/consumers.py. I don' t know why? Does anyone encountered the same problem?