我们正在使用内部托管的PyPI服务器（devpi-server），以便我们可以托管大量软件包的二进制轮，这些软件包需要很长时间才能从源代码安装，如scipy，matplotlib等。安装这些软件包与pip install scipy完美配合，绝对使用我们创造的轮子。但是，使用任何内部开发的python包，这些包依赖于其中一个包并运行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')
使用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')
如果我抓住了网址，我会看到：
$ 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，我会得到方向盘：
$ 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
答案 0 :(得分：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服务器复制，包括pypi.org的主要回购。例如：
# setup.py
from setuptools import setup
setup(name='spam', install_requires=['vprof>0.37'])
（而不是vprof，您可以使用除轮子之外不运送任何东西的任何其他包裹）
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')
邦。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'])
现在所有构建和打包命令也将失败，无法下载构建代码。
问题完全取决于使用的setuptools版本。 Since 26 Nov 2017 and version 38.2.0, setuptools supports fetching and installing wheel dependencies，如果您仍然遇到此问题：
setuptools 较新的操作系统版本应该已经发布了setuptools的最新版本。例如，Ubuntu 18.04默认为setuptools==39.0.1（link）。如果您仍然安装了旧版setuptools，则大部分时间它都将由系统软件包管理器管理，因此您不应通过pip进行更新。您可以用户安装setuptools
$ pip install --user --upgrade "setuptools>=38.2.0"
或使用虚拟环境。