Question

Write a decorator, called mylogging, that can be used to add a logging entry to a log file every time the decorated function is called. The log entry should include the function name and the values of the arguments (both positional and keyword) that are passed to the function. Test the code by using the decorator an a function and looking at the entries it creates in the log file.

Answer 1

# module to log the data to file
import logging
# logging debug level to file
# basically there are five levels
# ERROR
# DEBUG
# WARNING
# INFO
# CRITICAL
logging.basicConfig(filename="week10.log",level=logging.DEBUG)
# decrator function to log files
def mylogging(func):
   def inner(arg1,arg2):
       dct = locals()
       argument_one_name = [ k for k,v in dct.items() if v == arg1][0]
       argument_two_name = [ k for k,v in dct.items() if v == arg2][0]
       logging.debug("Argument {}:{} and Argument {}:{} and function:{}".format(argument_one_name,arg1,argument_two_name,arg2,func.__name__))
       func(arg1,arg2)
   return inner
# calling decrator to log files
@mylogging
def myfunction(arg1,arg2):
   pass
# calling function to log things
myfunction(10,20)
myfunction("csk","rcb")
myfunction("srh","mi")
myfunction("rr","dc")