[issue15613] argparse ArgumentDefaultsHelpFormatter interacts badly with --arg and nargs=+
New submission from Alex Jurkiewicz:
Sample code:
#!/usr/bin/env python
import argparse
print("\n\narg=foo, nargs=+")
parser =
argparse.ArgumentParser(formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument('foo', nargs='+', help='foos', default=['foo1', 'foo2'])
parser.print_help()
print("\n\narg=foo, nargs=*")
parser =
argparse.ArgumentParser(formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument('foo', nargs='*', help='foos', default=['foo1', 'foo2'])
parser.print_help()
print("\n\narg=--foo, nargs=+")
parser =
argparse.ArgumentParser(formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument('--foo', nargs='+', help='foos', default=['foo1', 'foo2'])
parser.print_help()
print("\n\narg=--foo, nargs=*")
parser =
argparse.ArgumentParser(formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument('--foo', nargs='*', help='foos', default=['foo1', 'foo2'])
parser.print_help()
The first example's help text for 'foo' is missing "(default: ['foo1',
'foo2'])". I tested 2.7.2, 2.7.3, 3.2.3.
--
components: Library (Lib)
messages: 167854
nosy: Alex.Jurkiewicz
priority: normal
severity: normal
status: open
title: argparse ArgumentDefaultsHelpFormatter interacts badly with --arg and
nargs=+
type: behavior
versions: Python 2.7, Python 3.2
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[issue29002] typing.AnyStr doc is unclear about python2 unicode support
New submission from Alex Jurkiewicz:
The typing.AnyStr documentation:
https://docs.python.org/3/library/typing.html#typing.AnyStr
It gives some examples using u-strings (u'foo') but doesn't make explicit some
subtleties about behaviour with Python 2. Specifically, with Python 2 all the
given examples work, and even this works:
concat("foo", u"bar")
Which seems contrary to the goal of AnyStr being "used for functions that may
accept any kind of string without allowing different kinds of strings to mix".
I think the documentation should call out that for Python 2, AnyStr doesn't
distinguish between str & unicode, and mention that in python 2, b'str' is
equivalent to 'str' (I know this is mentioned elsewhere, but it seems useful to
repeat it here).
--
assignee: docs@python
components: Documentation
messages: 283524
nosy: aj, docs@python
priority: normal
severity: normal
status: open
title: typing.AnyStr doc is unclear about python2 unicode support
type: enhancement
versions: Python 2.7, Python 3.3, Python 3.4, Python 3.5, Python 3.6, Python 3.7
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[issue28112] Add callback to functools.lru_cache
New submission from Alex Jurkiewicz: I'd like to add support for functools.lru_cache to have a callback parameter that runs every time an item is evicted from the cache. I've written a small prototype here: https://github.com/alexjurkiewicz/cpython/commit/2f788387466720d47f2c82242ac33b107b0bf470 The prototype is incomplete: * No C implementation * Doesn't run on lru_cache.cache_clear() * It would be nice to pass through args/kwargs for each evicted item Comments welcome! -- components: Library (Lib) messages: 276171 nosy: aj priority: normal severity: normal status: open title: Add callback to functools.lru_cache type: enhancement versions: Python 3.3, Python 3.4, Python 3.5, Python 3.6, Python 3.7 ___ Python tracker <http://bugs.python.org/issue28112> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue28112] Add callback to functools.lru_cache
Alex Jurkiewicz added the comment: OK, thanks for the feedback. For future searchers I am using the pylru module instead: https://pypi.python.org/pypi/pylru -- ___ Python tracker <http://bugs.python.org/issue28112> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
