[issue9399] Provide a 'print' action for argparse

Raymond Hettinger added the comment: Marking this as closed because there has been no activity or interest for over five years. If anyone wants to revive this and write a PR, feel free to reopen. The core idea is plausible, but this doesn't seem to be a recurring need. --

[issue9399] Provide a 'print' action for argparse

Change by Raymond Hettinger : -- assignee: bethard -> rhettinger nosy: +rhettinger ___ Python tracker ___ ___ Python-bugs-list

[issue9399] Provide a 'print' action for argparse

Change by Mark Lawrence : -- nosy: -BreamoreBoy ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue9399] Provide a 'print' action for argparse

paul j3 added the comment: As Steven notes, the patch lacks tests. It also lacks documentation. The 2 things that this class does different from 'version' are - write without passing the text through 'textwrap' - write to a user defined file There is a difference in opinion between Éric and

[issue9399] Provide a 'print' action for argparse

Mark Lawrence added the comment: @Paul what is your take on this, other opinions seem positive? -- nosy: +BreamoreBoy, paul.j3 versions: +Python 3.5 -Python 3.3 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9399

[issue9399] Provide a 'print' action for argparse

Changes by Berker Peksag berker.pek...@gmail.com: -- nosy: +berker.peksag ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9399 ___ ___

[issue9399] Provide a 'print' action for argparse

Changes by Denilson Figueiredo de Sá denilso...@gmail.com: -- nosy: +denilsonsa ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9399 ___ ___

[issue9399] Provide a 'print' action for argparse

Steven Bethard steven.beth...@gmail.com added the comment: Argparse's wrapping behavior is determined by the formatter_class: http://docs.python.org/library/argparse.html#formatter-class Is it reasonable to assume that if you're wrapping your own messages you're already specifying

[issue9399] Provide a 'print' action for argparse

Éric Araujo mer...@netwok.org added the comment: Thanks for the new patch. It does not apply cleanly to the py3k branch, but that’s very easily corrected. self.file.write(self.message) self.file.write('\n') Could be replaced by print(self.message, file=self.file)

[issue9399] Provide a 'print' action for argparse

Éric Araujo mer...@netwok.org added the comment: Thinking again about that, what’s wrong with argparse replacing \n with spaces and doing its own line wrapping? -- versions: +Python 3.3 -Python 3.2 ___ Python tracker rep...@bugs.python.org

[issue9399] Provide a 'print' action for argparse

Dennis Malcorps dennis.malco...@googlemail.com added the comment: I totally forgot about this patch, sorry... Due to university and another python project I am working on I didn't find the time to look at the test suite. I would really appreciate it if someone else could do this ;-) Anyway, I

[issue9399] Provide a 'print' action for argparse

Éric Araujo mer...@netwok.org added the comment: sys.std* should not be used as default values in a function definition, because they may be rebound to other objects. The usual idiom is to have None as default value and check it at call time. The patch also needs tests and docs. (FTR, the

[issue9399] Provide a 'print' action for argparse

Steven Bethard steven.beth...@gmail.com added the comment: The patch looks basically right. A few minor issues: * message=None, should probably be message,, that is, message should not be allowed to default to None - I can't see any use case for this action without a message. I believe this

[issue9399] Provide a 'print' action for argparse

Steven Bethard steven.beth...@gmail.com added the comment: The equivalent to optparse callback is basically to define __call__ in a subclass of Action. Pretty much the same amount of work because they both have complicated parameters. The callable I (not fully confidently) proposed would just

[issue9399] Provide a 'print' action for argparse

Dennis Malcorps dennis.malco...@googlemail.com added the comment: Here is a patch that adds a 'write' action to argparse. Usage example: parser = argparse.ArgumentParser() parser.add_argument(--license, action=write, message=This file\nis licensed under \t GPL)

[issue9399] Provide a 'print' action for argparse

Georg Brandl ge...@python.org added the comment: Sounds like a good addition to me. -- assignee: - bethard nosy: +georg.brandl ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9399 ___

[issue9399] Provide a 'print' action for argparse

Steven Bethard steven.beth...@gmail.com added the comment: Should this print to stdout or stderr? I wonder if the API should allow either, and instead look like: parser.add_argument('--license', action='write', message='...', file=sys.stdout) Where sys.stdout would be the default for the

[issue9399] Provide a 'print' action for argparse

Dennis Malcorps dennis.malco...@googlemail.com added the comment: parser.add_argument('--license', action='write', message='...', file=sys.stdout) The ability to redirect the output would be a nice addition. parser.add_argument('--license', action='call', callable=lambda:

[issue9399] Provide a 'print' action for argparse

New submission from Dennis Malcorps dennis.malco...@googlemail.com: Currently argparse has a 'version' action which can be triggered by user defined options which prints out a custom string. parser.add_argument(--version, action=version, version=test 1.2.3) Since the 'version' action can be

[issue9399] Provide a 'print' action for argparse

Changes by R. David Murray rdmur...@bitdance.com: -- nosy: +bethard versions: -Python 2.7 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9399 ___