Patches item #1682205, was opened at 2007-03-16 15:22
Message generated for change (Comment added) made by gbrandl
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>Category: None
>Group: Python 2.5
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Piet Delport (pjdelport)
Assigned to: Nobody/Anonymous (nobody)
>Summary: TypeError swallowing in UNPACK_SEQUENCE opcode
Initial Comment:
When UNPACK_SEQUENCE unpacks an iterable, it replaces any TypeError raised by
the iterator with a new, catch-all TypeError('unpack non-sequence') instance
(and empty traceback). This message is less useful than the ones it's
(presumably) intended to replace (raised by PyObject_GetIter(), via
unpack_iterable()), and obviously wrong when the TypeError originates in
unrelated user code.
The attached patch simply removes the check, which (as far as i can tell) has
no ill effects.
Examples (without the patch):
>>> a, b, c = 7
TypeError: unpack non-sequence
>>> a, b = ( int(x) for x in ['5', ()] )
TypeError: unpack non-sequence
With the patch applied, these result in:
>>> a, b, c = 7
TypeError: 'int' object is not iterable
>>> a, b = ( int(x) for x in ['5', ()] )
TypeError: int() argument must be a string or a number, not 'tuple'
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>Comment By: Georg Brandl (gbrandl)
Date: 2007-03-17 15:49
Message:
Logged In: YES
user_id=849994
Originator: NO
It's patch, after all :)
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