New submission from Gerrit Holl <[email protected]>:
When accidentally passing a string to warnings.warn where one should pass a
Warning-class, the error message is rather confusing:
$ ./python
Python 2.7.1+ (release27-maint:88766, Mar 8 2011, 16:51:59)
[GCC 4.4.5] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import warnings
>>> warnings.warn("aaa", "bbb")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: issubclass() arg 1 must be a class
It would be better for the error message to say TypeError: warnings must be
classes inherited from ... or something like that.
----------
components: Interpreter Core, Library (Lib)
messages: 130800
nosy: Gerrit.Holl
priority: normal
severity: normal
status: open
title: Confusing error message from warnings.warn
type: behavior
versions: Python 2.7
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Python tracker <[email protected]>
<http://bugs.python.org/issue11494>
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