[issue4109] Wrong UnboundLocalError with += operator

[Benjamin Peterson]

Benjamin Peterson <musiccomposition at gmail.com> added the comment:

Inplace operators ("+=", "-=" etc) are assignments since in the case of
immutable types like str

code += "some string"

is equivalent to

code = code + "some string"

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resolution:  -> invalid
status: open -> closed

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue4109>
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