"""resolution for Python issue 15289"""

import UserDict

class ClassAsDict(type, UserDict.UserDict):
    """\
This is a metaclass that allows you to access class data by treating
the class as a dictionary."""
    def __new__(mcs, name, bases, dict):
        """Unfortunately, we need to manually add 'data' to the class dict."""
        dict['data'] = {}
        return type.__new__(mcs, name, bases, dict)

class Alias(object):
    """\
A decorator to track functions via special names
that aren't limited to Python's naming rules.
"""

    __metaclass__ = ClassAsDict

    def __init__(self, str=None):
        self.str = str

    def __call__(self, func):
        if self.str:
            str = self.str
        else:
            str = func.__name__
        # Here we have a choice of ways to save our data in the class.
        self.__class__[str] = func  # Using the UserDict fuctionality.
        ## self.data[str] = func  # Requires us to know how UserDict works.
        return func

@Alias("f'")
def f_prime():
    pass

print Alias["f'"]