#!/usr/bin/env python

# This meta-class enforces an "identifier minimum length" rule
class VerboseClass(type):
    def __init__(self, name, bases, dict):
        # make sure attribute names are extra long
        for key, value in dict.items():
            # ignore special methods
            if key.startswith('__') and key.endswith('__'):
                continue
            if len(key) < 16:
                raise TypeError, "Attribute names must be at least 16 letters long"
        type.__init__(self, name, bases, dict)


class Verbose(object):
    __metaclass__ = VerboseClass


class Foo(Verbose):
    def a_very_simple_method_called_bar(self):
        print "Hello world"

    def spam(self): # this line will cause exception
        print "Sorry"