在myria-python中，我们使用setuptools和install_requires来配置需要哪些软件包。在我们的特定安装文件中，我们包括requests-toolbelt和在内requests。
当我们创建一个新的虚拟环境然后运行时python setup.py install，它第一次失败Cannot find required distribution requests。这似乎是因为pip标识requests toolbelt-0.3.1（注意空格）为package的正确匹配requests。
毕竟python setup.py install似乎再次运行requests。
这是GitHub问题，其中包含安装过程的完整日志。
重现步骤：
git clone https://github.com/uwescience/myria-python.gitcd myria-pythonmkvirtualenv myria-pythonpython setup.py整个实验室似乎都存在此问题，但是我们所有人都使用安装了10.9或10.10的Mac OSX。这是我机器的规格：
我还能够在我们的Ubuntu服务器之一上复制它：
这是错误日志的结尾：
Searching for requests-toolbelt
Reading https://pypi.python.org/simple/requests_toolbelt/
Best match: requests-toolbelt 0.3.1
Downloading https://pypi.python.org/packages/source/r/requests-toolbelt/requests-toolbelt-0.3.1.tar.gz#md5=e563377e46cd0be8c7b3ac144a65844c
Processing requests-toolbelt-0.3.1.tar.gz
Writing /var/folders/m_/qltd_g_13qd1v5tvr4l6q2rc0000gn/T/easy_install-2lqn7g/requests-toolbelt-0.3.1/setup.cfg
Running requests-toolbelt-0.3.1/setup.py -q bdist_egg --dist-dir /var/folders/m_/qltd_g_13qd1v5tvr4l6q2rc0000gn/T/easy_install-2lqn7g/requests-toolbelt-0.3.1/egg-dist-tmp-riz25e
no previously-included directories found matching '*.pyc'
warning: manifest_maker: MANIFEST.in, line 6: 'recursive-include' expects <dir> <pattern1> <pattern2> ...
warning: manifest_maker: MANIFEST.in, line 7: 'recursive-include' expects <dir> <pattern1> <pattern2> ...
no previously-included directories found matching 'docs/_build'
zip_safe flag not set; analyzing archive contents...
Adding requests-toolbelt 0.3.1 to easy-install.pth file
Installed /Users/dhalperi/Envs/myria-python2/lib/python2.7/site-packages/requests_toolbelt-0.3.1-py2.7.egg
Searching for requests
Best match: requests toolbelt-0.3.1
Downloading https://pypi.python.org/packages/source/r/requests-toolbelt/requests-toolbelt-0.3.1.tar.gz#md5=e563377e46cd0be8c7b3ac144a65844c
Processing requests-toolbelt-0.3.1.tar.gz
Writing /var/folders/m_/qltd_g_13qd1v5tvr4l6q2rc0000gn/T/easy_install-LKxX9E/requests-toolbelt-0.3.1/setup.cfg
Running requests-toolbelt-0.3.1/setup.py -q bdist_egg --dist-dir /var/folders/m_/qltd_g_13qd1v5tvr4l6q2rc0000gn/T/easy_install-LKxX9E/requests-toolbelt-0.3.1/egg-dist-tmp-3tgz5e
no previously-included directories found matching '*.pyc'
warning: manifest_maker: MANIFEST.in, line 6: 'recursive-include' expects <dir> <pattern1> <pattern2> ...
warning: manifest_maker: MANIFEST.in, line 7: 'recursive-include' expects <dir> <pattern1> <pattern2> ...
no previously-included directories found matching 'docs/_build'
zip_safe flag not set; analyzing archive contents...
requests-toolbelt 0.3.1 is already the active version in easy-install.pth
Installed /Users/dhalperi/Envs/myria-python2/lib/python2.7/site-packages/requests_toolbelt-0.3.1-py2.7.egg
error: Could not find required distribution requests
如何解决此问题，以便安装包而无需两次运行setup.py？
（从https://github.com/uwescience/myria-python/pull/35镜像）
几百个小时的Google搜索最终使我进入了这个numpy线程：
https://github.com/numpy/numpy/issues/2434
为此，他们必须在setup_requires AND中 添加numpyinstall_requires才能解决类似的问题。对请求执行此操作似乎已奏效。但是，我有点怀疑，因为上面提到的@Timusan首先没有看到我们的问题。
我在Mac和Ubuntu上都尝试过，现在可以在两个系统上通过全新的virtualenv安装。
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