test.py

import functools

def dec(f):
    i = dict()
    i['a'] = 0

    @functools.wraps(f)
    def wrap(*args):
        i['a'] = i['a'] + 1
        print i
        return f(*args)
    return wrap

def fff():
    print 'a'

bbb = dec(fff)

bbb()
bbb()
bbb()