[issue3781] warnings.catch_warnings fails gracelessly when recording warnings but no warnings are emitted
Jean-Paul Calderone
report at bugs.python.org
Fri Sep 5 00:10:09 CEST 2008
New submission from Jean-Paul Calderone <exarkun at divmod.com>:
This example shows the behavior:
from warnings import catch_warnings
def test():
with catch_warnings(True) as w:
assert str(w.message) == "foo", "%r != %r" % (w.message, "foo")
test()
This fails with an IndexError from the `w.message`. That's a bit
surprising, and since this is mostly an API useful for testing, it'd be
much better if it had a well-defined, documented (ie, stable and likely
to continue working in the next release of Python) error mode.
----------
components: Library (Lib)
messages: 72533
nosy: exarkun
severity: normal
status: open
title: warnings.catch_warnings fails gracelessly when recording warnings but no warnings are emitted
type: behavior
versions: Python 2.6
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<http://bugs.python.org/issue3781>
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