Mark Dickinson added the comment:
+1. I recently chastised a colleague for doing "raise KeyError(long_message)"
instead of "raise KeyError(missing_item)". When I went to the standard library
to support my POV, I found (to my chagrin) a big mix of the two styles.
>>> from collections import ChainMap
>>> d = ChainMap({}, {})
>>> try:
... d.pop('not there')
... except KeyError as e:
... key, = e.args
...
>>> key
"Key not found in the first mapping: 'not there'"
----------
nosy: +mark.dickinson
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue18163>
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