[issue44986] Date formats in help messages of argparse

[paul j3]

Change by paul j3 :


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nosy: +paul.j3

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[issue44986] Date formats in help messages of argparse

[Matías Senger]

Matías Senger  added the comment:

With this change there should be no need to escape anything, and it is still 
compatible with the old formatting. Plus, with the current implementation if 
you forget to escape something like %Y the error message is not helpful at all 
and only happens when invoked with -h option.

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[issue44986] Date formats in help messages of argparse

[Julian Berman]

Julian Berman  added the comment:

This is documented already I believe:

https://docs.python.org/3/library/argparse.html#help

> As the help string supports %-formatting, if you want a literal % to appear 
> in the help string, you must escape it as %%.

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nosy: +Julian

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[issue44986] Date formats in help messages of argparse

[Raymond Hettinger]

Change by Raymond Hettinger :


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Removed message: https://bugs.python.org/msg400243

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[issue44986] Date formats in help messages of argparse

[Raymond Hettinger]

Raymond Hettinger  added the comment:

I don't think anything like this should be done.  Besides breaking existing 
'%%' markup, it invents a new %-formatting notation.

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nosy: +rhettinger
type: crash -> enhancement

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[issue44986] Date formats in help messages of argparse

[Roundup Robot]

Change by Roundup Robot :


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keywords: +patch
nosy: +python-dev
nosy_count: 1.0 -> 2.0
pull_requests: +26375
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/27923

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[issue44986] Date formats in help messages of argparse

[Matías Senger]

New submission from Matías Senger :

If the help message of an argument in argparse contains a date format, e.g. 
%Y-%m-%d, it crashes when printing the help after being invoked with the -h 
option. Uploaded an example.

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components: Library (Lib)
files: deleteme.py
messages: 400183
nosy: mail.de.senger
priority: normal
severity: normal
status: open
title: Date formats in help messages of argparse
type: crash
versions: Python 3.11
Added file: https://bugs.python.org/file50232/deleteme.py

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