#!/usr/bin/env python
# encoding: utf-8

# sample code for setattr bug
# steven.samuel.cole@gmail.com

from sys import modules

def show_weird_behavior():

    # set a local variable called name to value 'value',
    # equivalent to name = 'value'
    setattr(modules[__name__], 'name', 'value')

    # this code prints name : value as expected
    print 'name :', name

    # if the following line is active:
    # name = None
    # the print line above causes an
    # UnboundLocalError: local variable 'name' referenced before assignment
    # --> code executed later has an impact on code executed earlier ?!?

    # IMHO, this behavior is so unexpected that it qualifies as a bug

    # same behavior on Python 2.6.1 and 2.7 on x64 Mac Snow Leopard
    # and Python 2.6.5 on x64 Kubuntu 10.04


if __name__ == '__main__':
    show_weird_behavior()