[New-bugs-announce] [issue9049] UnboundLocalError in nested function
Andreas Hofmeister
report at bugs.python.org
Mon Jun 21 21:46:39 CEST 2010
New submission from Andreas Hofmeister <andreas.hofmeister at yahoo.de>:
Description:
An unexpected UnboundLocalError is produced when assigning a value to a variable inside a nested function. The first assignment to the variable is in the enclosing function.
Example:
def x():
a = False
def y():
print a
a = True
return y
Calling x()() produces an UnboundLocalError on the 'print a' line.
If the 'a = True' line is removed, no error occurs.
Tested with:
- 2.5.1
- 2.6.5
Keywords:
Nested function, UnboundLocalError, variable assignment
Thank you for your attention
----------
components: Interpreter Core
messages: 108306
nosy: Andreas Hofmeister
priority: normal
severity: normal
status: open
title: UnboundLocalError in nested function
type: behavior
versions: Python 2.5, Python 2.6
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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue9049>
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