[issue25436] argparse.ArgumentError missing error message in __repr__

[Daniel Fortunov]

New submission from Daniel Fortunov:

ArgumentError's __init__() fails to call super(), meaning
that the base exception doesn’t get a message, and thus repr() always
returns “argparse.ArgumentError()” with no message.

Not very helpful if that repr gets logged, or included in another error message :-(

I've attached a patch that fixes this, and adds corresponding tests.

----------
components: Library (Lib)
files: cpython_ArgumentError_repr.patch
keywords: patch
messages: 253160
nosy: dfortunov
priority: normal
severity: normal
status: open
title: argparse.ArgumentError missing error message in __repr__
Added file: http://bugs.python.org/file40813/cpython_ArgumentError_repr.patch

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