Декораторы

В классе

class Demo():
    def __init__(self):
        pass

    def dec(param):
        def dec_func(func,*args):
            print(param)
            def helper(self,*args):
                print('helper')
                func(self,*args)
            return helper
        return dec_func
        
    @dec('param')
    def ff(self,a):
        print('body =',a)

f=Demo()
f.ff('head')

Log

def log(func):
    def wrap(*args, **kwargs):
        func(*args, **kwargs)
	print('{}({}, {})'.format(func.__name__, ', '.join(args), 
		', '.join(["{0}={1}".format(a) for a in kwargs.items()])))
    return wrap

@log
def Handler(*args, **kwargs):
    pass	

Handler('wefw', 'bbbb', a=1, b=2)

# Output:
# Handler(wefw, bbbb, a=1, b=2)

Function name with Filename

import re
def print_function_name(func):
    def wrapper(*args, **kwargs):
        pattern = r'[^\\\/]+$'
        match = re.search(pattern, __file__)
        debug("[{1}] -> {0}{2}".format(func.__name__,match.group(0), args[1:]))
        return func(*args, **kwargs)
    return wrapper

@print_function_name
def InitDevices(self):
    super().InitDevices()
    
# Output:
# [main.py] -> InitDevices()