Decorator to print function call details - parameters names and effective values

Question

I want to make a function that being a decorator to another function will print that function call details - parameters names and effective values. My current implementation

Answer 1

Sorry its a bit messy. I modified some code from http://wiki.python.org/moin/PythonDecoratorLibrary#Easy_Dump_of_Function_Arguments

def dump_args(func):
    "This decorator dumps out the arguments passed to a function before calling it"
    argnames = func.func_code.co_varnames[:func.func_code.co_argcount]
    fname = func.func_name
    def echo_func(*args,**kwargs):
        print fname, "(", ', '.join(
            '%s=%r' % entry
            for entry in zip(argnames,args[:len(argnames)])+[("args",list(args[len(argnames):]))]+[("kwargs",kwargs)]) +")"
    return echo_func

@dump_args
def test(a, b = 4, c = 'blah-blah', *args, **kwargs):
    pass

test(1, 2, 3, 4, 5, d = 6, g = 12.9)

output:

test ( a=1, b=2, c=3, args=[4, 5], kwargs={'d': 6, 'g': 12.9})