# Fix typo in argparse docs.
> Sometimes, when dealing with **a** particularly long argument list**s**, [...]
Mixture between plural and singular forms is incorrect. Use singular consistently since typically only a single argument list is employed. Change to:
> Sometimes, when dealing with a particularly long argument list, [...]
No issue was opened, since this is a trivial change.
Automerge-Triggered-By: GH:rhettinger
Fixed few typos and enhanced few paragraphs for your review and consideration.
Trivial contribution towards continuous improvement, so no issue was raised.
Automerge-Triggered-By: GH:rhettinger
No work has been done to move this forward. On the theory that perfect is the enemy of good, I'm going to push it and we can make minor edits as needed afterwards.
…choices' argument of 'argparse.ArgumentParser.add_argument'.
Here's a short first proposal of doc. enhancement addressing [bpo-41024]().
Automerge-Triggered-By: @csabella
The `required` argument to `argparse.add_subparsers` was added in #3027. This PR specifies the earliest version of Python where it is available.
https://bugs.python.org/issue26510
Automerge-Triggered-By: @merwok
The `allow_abbrev` option for ArgumentParser is documented and intended to disable support for unique prefixes of --options, which may sometimes be ambiguous due to deferred parsing.
However, the initial implementation also broke parsing of grouped short flags, such as `-ab` meaning `-a -b` (or `-a=b`). Checking the argument for a leading `--` before rejecting it fixes this.
This was prompted by pytest-dev/pytest#5469, so a backport to at least 3.8 would be great 😄
And this is my first PR to CPython, so please let me know if I've missed anything!
https://bugs.python.org/issue26967
bpo-26510 in 3.7.0a2 changed the behavior of argparse to make
subparsers required by default, returning to the behavior of 2.7
and 3.2. The behavior was changed in 3.3 to be no longer required.
While it might make more sense to have the default to required,
compatibility with 3.3 through 3.6 is probably less disruptive
than trying to reintroduce compatibility with 2.7 at this point.
This change restores the 3.6 behavior.
This adds support for parsing a command line where options and positionals are intermixed as is common in many unix commands. This is paul.j3's patch with a few tweaks.
* Indent versionchanged at method level, not class level
* Mark up ``--help`` to avoid generating an en dash
* Use forward slash in Unix command line with a dollar sign ($) prompt
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