Decorator to print Function call details in Python

# defining a decorator 
def hello_decorator(func): 
  
    # inner1 is a Wrapper function in  
    # which the argument is called 
      
    # inner function can access the outer local 
    # functions like in this case "func" 
    def inner1(): 
        print("Hello, this is before function execution") 
  
        # calling the actual function now 
        # inside the wrapper function. 
        func() 
  
        print("This is after function execution") 
          
    return inner1 
  
  
# defining a function, to be called inside wrapper 
def function_to_be_used(): 
    print("This is inside the function !!") 
  
  
# passing 'function_to_be_used' inside the 
# decorator to control its behavior 
function_to_be_used = hello_decorator(function_to_be_used) 
  
  
# calling the function 
function_to_be_used() 

# Decorator to print function call
# details
def function_details(func):
    
    
    # Getting the argument names of the
    # called function
    argnames = func.__code__.co_varnames[:func.__code__.co_argcount]
    
    # Getting the Function name of the
    # called function
    fname = func.__name__
    
    
    def inner_func(*args, **kwargs):
        
        print(fname, "(", end = "")
        
        # printing the function arguments
        print(', '.join( '% s = % r' % entry
            for entry in zip(argnames, args[:len(argnames)])), end = ", ")
        
        # Printing the variable length Arguments
        print("args =", list(args[len(argnames):]), end = ", ")
        
        # Printing the variable length keyword
        # arguments
        print("kwargs =", kwargs, end = "")
        print(")")
        
    return inner_func


# Driver Code
@function_details
def GFG(a, b = 1, *args, **kwargs):
    pass

GFG(1, 2, 3, 4, 5, d = 6, g = 12.9)
GFG(1, 2, 3)
GFG(1, 2, d = 'Geeks')