Mercurial > hg
view mercurial/thirdparty/attr/converters.py @ 37045:a708e1e4d7a8
url: support suppressing Accept header
Sending this header automatically could interfere with future
testing and client behavior. Let's add a knob to disable the
behavior.
We don't have a control for User-Agent because urllib will send
it if we don't set something. I don't feel like hacking into the
bowels of urllib to figure out how to suppress that. UA shouldn't
be used for anything meaningful. So it shouldn't pose any problems
beyond non-determinism (since the header has the Mercurial version in
it).
Differential Revision: https://phab.mercurial-scm.org/D2843
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Tue, 13 Mar 2018 10:34:36 -0700 |
parents | 765eb17a7eb8 |
children | e1c586b9a43c |
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""" Commonly useful converters. """ from __future__ import absolute_import, division, print_function def optional(converter): """ A converter that allows an attribute to be optional. An optional attribute is one which can be set to ``None``. :param callable converter: the converter that is used for non-``None`` values. .. versionadded:: 17.1.0 """ def optional_converter(val): if val is None: return None return converter(val) return optional_converter