[issue37150] Do not allow to pass FileType class object instead of instance in add_argument
Demid added the comment: What if I will add mode check in FileType.__init__? -- ___ Python tracker <https://bugs.python.org/issue37150> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue37150] Do not allow to pass FileType class object instead of instance in add_argument
Demid added the comment:
If you will run `python test.py hello.txt, where test.py is:
import argparse
parser = argparse.ArgumentParser()
parser.add_argument('echo', type=argparse.FileType)
args = parser.parse_args()
print(args.echo)
You will receive:
FileType('hello.txt')
I think that can be confusing for someone who will forget to invoke FileType
constructor.
‐‐‐ Original Message ‐‐‐
On Tuesday, June 4, 2019 10:27 PM, Michele Angrisano
wrote:
>
>
> Michele angrisanomichele.angris...@gmail.com added the comment:
>
> Reading the examples in the doc, it's clear the behavior when FileType takes
> an argument. What's the behavior of FileType when is called without any
> argument?
>
> -
>
> nosy: +mangrisano
>
> Python tracker rep...@bugs.python.org
> https://bugs.python.org/issue37150
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[issue37144] tarfile.open: improper handling of path-like object
Change by Demid : -- keywords: +patch pull_requests: +13703 stage: -> patch review pull_request: https://github.com/python/cpython/pull/13817 ___ Python tracker <https://bugs.python.org/issue37144> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue37144] tarfile.open: improper handling of path-like object
Change by Demid : -- nosy: +dm ___ Python tracker <https://bugs.python.org/issue37144> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue37144] tarfile.open: improper handling of path-like object
Change by Demid : -- nosy: +zygocephalus -dm ___ Python tracker <https://bugs.python.org/issue37144> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue37150] Do not allow to pass FileType class object instead of instance in add_argument
Change by Demid : -- keywords: +patch pull_requests: +13690 stage: -> patch review pull_request: https://github.com/python/cpython/pull/13805 ___ Python tracker <https://bugs.python.org/issue37150> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue37150] Do not allow to pass FileType class object instead of instance in add_argument
New submission from Demid :
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:
parser = argparse.ArgumentParser()
parser.add_argument('-x', type=argparse.FileType)
--
components: Library (Lib)
messages: 344568
nosy: zygocephalus
priority: normal
severity: normal
status: open
title: Do not allow to pass FileType class object instead of instance in
add_argument
type: enhancement
versions: Python 2.7, Python 3.5, Python 3.6, Python 3.7, Python 3.8, Python 3.9
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