decorators.py

from collections import defaultdict

class Manager(object):
    def __init__(self):
        self.strings = defaultdict(list) # { stringname: [func1, func2, ...], ... }
    
    def deco(self, string):
        def decofunc(func):
            self.strings[string].append(func)
            return func
        return decofunc
    
m = Manager()

@m.deco("somestring")
def myfunc(var1, var2, var3):
    print var1, var2, var3
    
myfunc(1, 2, 3) # 1 2 3

print m.strings # defaultdict(<type 'list'>, {'somestring': [<function myfunc at 0x00B695B0>]})