There is a possibility that someone (like me) accidentally will omit parentheses with `FileType` arguments after `FileType`, and parser will contain wrong file until someone will try to use it.
Example:
```python
parser = argparse.ArgumentParser()
parser.add_argument('-x', type=argparse.FileType)
```
https://bugs.python.org/issue37150
(cherry picked from commit 03d5831a2d)
Co-authored-by: zygocephalus <grrrr@protonmail.com>
- bugfix and test for fragile metavar handling in argparse (see
bpo-24089, bpo-14046, bpo-25058, bpo-11874)
- also fixes some incorrect tests that did not make 1-element tuples correctly
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.
Before, if a default was set on the parent parser, any default for that
variable set via set_defaults on a subparser would be ignored. Now
the subparser set_defaults is honored.
Patch by Jyrki Pullianinen.
on the action's default, reverting it back to previous behavior. Conversion
is only done on string defaults.
Add a test for this and another test that ensures such type conversions are
only called once.
This fixes a regression introduced by the fix for issue #13922. Although args
is not documented as being allowed to be a tuple, previously this worked and
so naturally there are programs in the field that depend on it.
Patch by Zbyszek Jędrzejewski-Szmek.
This fixes a regression introduced by the fix for issue #13922. Although args
is not documented as being allowed to be a tuple, previously this worked and
so naturally there are programs in the field that depend on it.
Patch by Zbyszek Jędrzejewski-Szmek.
Before, the type function was called twice in the case where the default
was specified and the argument was given as well. This was especially
problematic for the FileType type, as a default file would always be
opened, even if a file argument was specified on the command line.
Patch by Arnaud Fontaine, with additional test by Mike Meyer.
Before, the type function was called twice in the case where the default
was specified and the argument was given as well. This was especially
problematic for the FileType type, as a default file would always be
opened, even if a file argument was specified on the command line.
Patch by Arnaud Fontaine, with additional test by Mike Meyer.
Miss Islington (bot)
Batuhan Taşkaya
Serhiy Storchaka
Steve Dower
Berker Peksag
wim glenn
Ned Deily
Anthony Sottile
R. David Murray
Victor Stinner
Xiang Zhang
Vinay Sajip
Martin Panter
Benjamin Peterson
Ezio Melotti
Raymond Hettinger
Eli Bendersky
Petri Lehtinen
Barry Warsaw