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我们正在使用内部托管的 PyPI服务器devpi-server（pip install scipy已创建。但是，使用我们内部开发的任何依赖于其中一个包的 python 包并运行python setup.py install|develop|test|whatever会导致以下错误：

No local packages or download links found for scipy
Traceback (most recent call last):
  File "setup.py", line 136, in <module>
    'develop': DevelopCommand
  File "/usr/local/lib/python2.7/distutils/core.py", line 112, in setup
    _setup_distribution = dist = klass(attrs)
  File "/users/me/virtualenvs/devpi-test/lib/python2.7/site-packages/setuptools/dist.py", line 239, in __init__
    self.fetch_build_eggs(attrs.pop('setup_requires'))
  File "/users/me/virtualenvs/devpi-test/lib/python2.7/site-packages/setuptools/dist.py", line 263, in fetch_build_eggs
    parse_requirements(requires), installer=self.fetch_build_egg
  File "/users/me/virtualenvs/devpi-test/lib/python2.7/site-packages/pkg_resources.py", line 564, in resolve
    dist = best[req.key] = env.best_match(req, self, installer)
  File "/users/me/virtualenvs/devpi-test/lib/python2.7/site-packages/pkg_resources.py", line 802, in best_match
    return self.obtain(req, installer) # try and download/install
  File "/users/me/virtualenvs/devpi-test/lib/python2.7/site-packages/pkg_resources.py", line 814, in obtain
    return installer(requirement)
  File "/users/me/virtualenvs/devpi-test/lib/python2.7/site-packages/setuptools/dist.py", line 313, in fetch_build_egg
    return cmd.easy_install(req)
  File "/users/me/virtualenvs/devpi-test/lib/python2.7/site-packages/setuptools/command/easy_install.py", line 587, in easy_install
    raise DistutilsError(msg)
distutils.errors.DistutilsError: Could not find suitable distribution for Requirement.parse('scipy')

并与easy_install：

$ easy_install scipy
Searching for scipy
Reading http://pypi.internal.example.com/us/base/+simple/scipy/
No local packages or download links found for scipy
error: Could not find suitable distribution for Requirement.parse('scipy')

如果我抓住它正在查看的 URL，我会得到：

$ curl http://pypi.internal.example.com/us/base/+simple/scipy/
<html>
  <head>
    <title>us/base: links for scipy</title></head>
  <body>
    <h1>us/base: links for scipy</h1>

    <form action="http://pypi.internal.example.com/us/base/+simple/scipy/refresh" method="post"><input name="refresh" type="submit" value="Refresh PyPI links"/></form>
us/external <a href="../../../external/+f/c48/5006bc28a8607/scipy-0.14.0-cp27-none-linux_x86_64.whl#md5=c485006bc28a8607b2fc1331df452dc1">scipy-0.14.0-cp27-none-linux_x86_64.whl</a><br/>
</body></html>

如果我请求该输出中列出的 URL，我会得到轮子：

$ curl --silent 'http://pypi.internal.example.com/us/external/+f/c48/5006bc28a8607/scipy-0.14.0-cp27-none-linux_x86_64.whl#md5=c485006bc28a8607b2fc1331df452dc1' \
      | file -
/dev/stdin: Zip archive data, at least v2.0 to extract
4

1 回答 1

1

首先，问题中描述的问题不依赖于使用devpi，并且可以使用任何 PyPI 服务器重现，包括pypi.org的主仓库。例子：

# setup.py
from setuptools import setup

setup(name='spam', install_requires=['vprof>0.37'])

（代替vprof，您可以采取除轮子外不运送任何其他物品的任何其他包裹）

测试它：

$ pip install --upgrade "setuptools<38.2.0"
...
Successfully installed setuptools-38.1.0

$ python setup.py install
running install
running bdist_egg
running egg_info
writing spam.egg-info/PKG-INFO
...
Processing dependencies for spam==0.0.0
Searching for vprof>0.37
Reading https://pypi.python.org/simple/vprof/
No local packages or working download links found for vprof>0.37
error: Could not find suitable distribution for 
Requirement.parse('vprof>0.37')

砰。当您将仅二进制包声明为构建依赖项时，情况会变得更糟：

setup(name='spam', setup_requires=['vprof>0.37'])

现在所有的构建和打包命令也会失败，无法下载构建依赖。

该问题仅取决于使用的setuptools版本。自 2017 年 11 月 26 日和版本 38.2.0 起，setuptools支持获取和安装轮子依赖项，所以如果您仍然遇到此问题：

升级setuptools

较新的操作系统版本应该已经发布了最新版本的setuptools. 例如，Ubuntu 18.04setuptools==39.0.1默认具有 ( link )。如果您仍然setuptools安装旧版本，大多数情况下它将由系统包管理器管理，因此您不应该通过pip. 您可以用户安装一个额外的副本setuptools 

$ pip install --user --upgrade "setuptools>=38.2.0"

或为此使用虚拟环境。

于 2018-05-18T20:07:50.263 回答