找不到满足pytz要求的版本 [英] Could not find a version that satisfies the requirement pytz

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问题描述

我在virtualenv中安装 pytz 时遇到问题.

I have a problem installing pytz in virtualenv.

下载/解压pytz
找不到满足pytz要求的版本(来自以下版本:2009r,2008b,2009f,2008c,2007g,2011g,2005m,2011e,2007f,2011k,2007k,2006j,2008h,2008i,2011e,2008a,2009e,2006g, 2011j,2010l,2005m,2008i,2005k,2008g,2007c,2007i,2009l,2009r,2006j,2011k,2007d,2006p,2009i,2009u,2007i,2009f,2010g,2008h,2009a,2007g,2011e,2006p,2012b, 2010k,2005r,2007f,2009l,2009p,2008c,2009j,2008g,2010g,2010h,2011h,2010k,2007c,2007d,2011d,2009l,2011c,2008a,2005m,2007k,2009n,2011d,2010o,2013b,2012h, 2010e,2012c,2012d,2012f,2011n,2011b,2011j,2008c,2012j,2007k,2009f,2009d,2010e,2010b,2013b,2011d,2009p,2008h,2005r,2009i,2009n,2009a,2010k,2008g,2006g, 2008b,2012c,2009i,2007g,2012c,2010h,2011n,2012g,2007d,2008a,2009u,2012g,2010o,2006p,2010b,2009u,2012d,2011k,2012f,2009a,2007f,2011h,2010l,2009j,2011g, 2009g,2009g,2005r,2011c,2012g,2009g,2012d,2009j,2010o,2007c,2010g,2006g,2009d,2010h, 2005k,2006j,2010b,2009n,2011g,2011c,2012b,2009e,2009d,2011j,2007i,2012j,2010l,2009r,2012h,2010e,2009p,2008i,2012f,2009e,2012b,2011h,2005k,2008b,2013b, 2011n,2012j,2004b)
清理...
没有与pytz的版本匹配的发行版

Downloading/unpacking pytz
Could not find a version that satisfies the requirement pytz (from versions: 2009r, 2008b, 2009f, 2008c, 2007g, 2011g, 2005m, 2011e, 2007f, 2011k, 2007k, 2006j, 2008h, 2008i, 2011e, 2008a, 2009e, 2006g, 2011j, 2010l, 2005m, 2008i, 2005k, 2008g, 2007c, 2007i, 2009l, 2009r, 2006j, 2011k, 2007d, 2006p, 2009i, 2009u, 2007i, 2009f, 2010g, 2008h, 2009a, 2007g, 2011e, 2006p, 2012b, 2010k, 2005r, 2007f, 2009l, 2009p, 2008c, 2009j, 2008g, 2010g, 2010h, 2011h, 2010k, 2007c, 2007d, 2011d, 2009l, 2011c, 2008a, 2005m, 2007k, 2009n, 2011d, 2010o, 2013b, 2012h, 2010e, 2012c, 2012d, 2012f, 2011n, 2011b, 2011j, 2008c, 2012j, 2007k, 2009f, 2009d, 2010e, 2010b, 2013b, 2011d, 2009p, 2008h, 2005r, 2009i, 2009n, 2009a, 2010k, 2008g, 2006g, 2008b, 2012c, 2009i, 2007g, 2012c, 2010h, 2011n, 2012g, 2007d, 2008a, 2009u, 2012g, 2010o, 2006p, 2010b, 2009u, 2012d, 2011k, 2012f, 2009a, 2007f, 2011h, 2010l, 2009j, 2011g, 2009g, 2009g, 2005r, 2011c, 2012g, 2009g, 2012d, 2009j, 2010o, 2007c, 2010g, 2006g, 2009d, 2010h, 2005k, 2006j, 2010b, 2009n, 2011g, 2011c, 2012b, 2009e, 2009d, 2011j, 2007i, 2012j, 2010l, 2009r, 2012h, 2010e, 2009p, 2008i, 2012f, 2009e, 2012b, 2011h, 2005k, 2008b, 2013b, 2011n, 2012j, 2004b)
Cleaning up...
No distributions matching the version for pytz

最新版本的pip似乎有问题.

It seems like it's a problem with the latest version of pip.

有什么解决方法吗?

推荐答案

由于行为的这种变化,使用pip v1.4或更高版本安装pytz时会发生此错误:

This error occurs when installing pytz using pip v1.4 or newer, due to this change in behaviour:

预发行版本

从v1.4开始,pip将仅安装 PEP426 指定的稳定版本

Pre-release Versions

Starting with v1.4, pip will only install stable versions as specified by PEP426 by default. If a version cannot be parsed as a compliant PEP426 version then it is assumed to be a pre-release.

如果需求说明符包含预发布或开发版本(例如>=0.0.dev0),则pip将允许该需求的预发布和开发版本.这不包括!=标志.

If a Requirement specifier includes a pre-release or development version (e.g. >=0.0.dev0) then pip will allow pre-release and development versions for that requirement. This does not include the != flag.

pip install命令还支持--pre标志,该标志将允许安装预发行版和开发发行版.

The pip install command also supports a --pre flag that will enable installing pre-releases and development releases.

pytz软件包的版本标识符的格式类似于2013b. PEP426 使用

The version identifiers for the pytz package have a format like 2013b. PEP426 uses the version identifiers described in PEP440, which specifies that:

公共版本标识符必须符合以下方案:

Public version identifiers MUST comply with the following scheme:

N[.N]+[{a|b|c|rc}N][.postN][.devN]

由于像2013b这样的pytz版本与此格式不匹配,因此pip 1.4+版将pytz所有版本视为预发行版本,并且未安装它们默认情况下.

Because the pytz versions like 2013b do not match this format, version 1.4+ of pip is treating all versions of pytz as pre-release versions, and is not installing them by default.

如果仅安装pytz,则可以使用--pre标志来避免这种行为,但是您不想使用此标志来安装整个项目的要求:某些软件包的发行版可能不稳定您不想要的版本.在这种情况下,请使用上述行为:如果为程序包指定预发行"版本号,则pip将搜索程序包的预发行"版本.所以我已将其添加到我的requirements.txt:

If you are only installing pytz, you can use the --pre flag to avoid this behaviour, but you wouldn't want to use this flag for installing your entire project's requirements: some packages might have unstable pre-release versions you don't want. In that case, use the behaviour described above: if you specify a "pre-release" version number for the package, then pip will search for "pre-release" versions of the package. So I've added this to my requirements.txt:

pytz>=2013b

升级软件包时,pip现在将正确搜索并安装最新版本的pytz.

When I upgrade my packages, pip will now correctly search for and install the latest version of pytz.

此问题已在pytz错误跟踪器中以 issue#1204837的形式归档,并且第974号问题.

This has been filed as issue #1204837 in the pytz bug tracker and issue #974 in the pip bug tracker.

停止按下:如 PyTz错误报告,现在pytz的版本号已更改为例如2013.7-因此,一旦升级到该版本,就不会再出现此问题.

Stop Press: As described in the PyTz bug report, the version numbering of pytz has now been changed to, for example, 2013.7 - so once you have upgraded to this, the problem should no longer occur.

这篇关于找不到满足pytz要求的版本的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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