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Wed Nov 21 00:41:07 CET 2012 · https://mail.python.org/pipermail/python-dev/2012-November/122850.html

On Nov 20, 2012, at 05:35 PM, Terry Reedy wrote:

>On 11/20/2012 3:35 PM, barry.warsaw wrote:
>
>>           for entry in path:
>> +            if not isinstance(entry, (str, bytes)):
>> +                continue
>
>Given that a non-(str,bytes) entry could indicate a programming error, should
>a warning be emitted before continuing?

That's not what happens in Python 3.2.  In fact, this bug report was triggered
by someone who was already inserting None to sys.path[0].  It is silently
ignored in Python 3.2, but tracebacked in 3.3.

Cheers,
-Barry

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Showing content from https://mail.python.org/pipermail/python-dev/2012-November/122850.html below:

[Python-Dev] [Python-checkins] cpython (3.3): - Issue #16514: Fix regression causing a traceback when sys.path[0] is None