Why this throws an UnboundLocalError ?

Discussion in 'Python' started by Marc Aymerich, Jan 30, 2014.

  1. Dear all,

    I have a very simple module

    glic3@e4200:# cat globalstate.py
    GLOBAL = 0

    def update():
    GLOBAL += 1


    however it doesn't work!!

    glic3@e4200:# python
    Python 2.7.3 (default, Aug 1 2012, 05:14:39)
    [GCC 4.6.3] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import globalstate
    >>> globalstate.update()

    Traceback (most recent call last):
    File "<stdin>", line 1, in <module>
    File "globalstate.py", line 4, in update
    GLOBAL += 1
    UnboundLocalError: local variable 'GLOBAL' referenced before assignment


    And I don't know why :(
    Anyone ?

    Thanks!!
    --
    Marc
    Marc Aymerich, Jan 30, 2014
    #1
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