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| author | Berker Peksag <berker.peksag@gmail.com> | 2014-07-11 16:50:25 (GMT) |
|---|---|---|
| committer | Berker Peksag <berker.peksag@gmail.com> | 2014-07-11 16:50:25 (GMT) |
| commit | d8089e0d04a98ab7997eff7abc9abf2a4f6854b8 (patch) | |
| tree | 3690ed07fb49970ca55ce6a7fd2477232697dfda /Lib/warnings.py | |
| parent | 6e1ccfe87261a9bc3818d1b4c2409eb1b7db19c5 (diff) | |
| download | cpython-d8089e0d04a98ab7997eff7abc9abf2a4f6854b8.zip cpython-d8089e0d04a98ab7997eff7abc9abf2a4f6854b8.tar.gz cpython-d8089e0d04a98ab7997eff7abc9abf2a4f6854b8.tar.bz2 | |
Issue #16382: Improve exception message of warnings.warn() for bad category.
Initial patch by Phil Elson.
Diffstat (limited to 'Lib/warnings.py')
| -rw-r--r-- | Lib/warnings.py | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/Lib/warnings.py b/Lib/warnings.py index a427e35..f37b8a7 100644 --- a/Lib/warnings.py +++ b/Lib/warnings.py @@ -162,7 +162,9 @@ def warn(message, category=None, stacklevel=1): # Check category argument if category is None: category = UserWarning - assert issubclass(category, Warning) + if not (isinstance(category, type) and issubclass(category, Warning)): + raise TypeError("category must be a Warning subclass, " + "not '{:s}'".format(type(category).__name__)) # Get context information try: caller = sys._getframe(stacklevel) |