[Jython-bugs] [ jython-Bugs-1873148 ] list.__iadd__ not switching to __radd__ on NotImplemented

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Bugs item #1873148, was opened at 2008-01-16 11:32
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Category: Core
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: jason kirtland (jek)
Assigned to: Nobody/Anonymous (nobody)
Summary: list.__iadd__ not switching to __radd__ on NotImplemented

Initial Comment:
A generic 's += o' doesn't seem to be processing NotImplemented returned by s.__iadd__(o).  On CPython, evaluation seems to fall back to o.__radd__(s) in this case.  In Jython, s == NotImplemented after that +=.

The __iadd__ on Jython's list does seem to recognize NotImplemented but doesn't fall back to __radd__.


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