pip3 失败，但 pip 与 virtualenv 一起工作正常答案

【问题标题】：pip3 fails but pip works fine with virtualenvpip3 失败，但 pip 与 virtualenv 一起工作正常
【发布时间】：2015-12-02 08:48:19
【问题描述】：

我想为 python3 安装 virtualenv。在过去的一个小时里，我一直在尝试解决这个问题，但没有运气。

root@XXXX:~# pip3 install virtualenv
Downloading/unpacking virtualenv
  Cannot fetch index base URL https://pypi.python.org/simple/
  Could not find any downloads that satisfy the requirement virtualenv
Cleaning up...
No distributions at all found for virtualenv
Storing debug log for failure in /root/.pip/pip.log
root@XXXX:~# vim /root/.pip/pip.log
root@XXXX:~# pip install virtualenv
Downloading/unpacking virtualenv
  Downloading virtualenv-13.1.2-py2.py3-none-any.whl (1.7MB): 1.7MB downloaded
Installing collected packages: virtualenv
Successfully installed virtualenv
Cleaning up...

如您所见，pip 工作正常，但 pip3 超时。

根据失败的 pip.log 输出，pip3 尝试向 pypi 请求超时：

/usr/bin/pip3 run on Wed Dec  2 08:45:51 2015
Downloading/unpacking virtualenv
  Getting page https://pypi.python.org/simple/virtualenv/
  Could not fetch URL https://pypi.python.org/simple/virtualenv/: timed out
  Will skip URL https://pypi.python.org/simple/virtualenv/ when looking for download links for virtualenv
  Getting page https://pypi.python.org/simple/
  Could not fetch URL https://pypi.python.org/simple/: timed out
  Will skip URL https://pypi.python.org/simple/ when looking for download links for virtualenv
  Cannot fetch index base URL https://pypi.python.org/simple/
  URLs to search for versions for virtualenv:
  * https://pypi.python.org/simple/virtualenv/
  Getting page https://pypi.python.org/simple/virtualenv/
  Could not fetch URL https://pypi.python.org/simple/virtualenv/: timed out
  Will skip URL https://pypi.python.org/simple/virtualenv/ when looking for download links for virtualenv
  Could not find any downloads that satisfy the requirement virtualenv
Cleaning up...
  Removing temporary dir /tmp/pip_build_root...
No distributions at all found for virtualenv
Exception information:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/pip/basecommand.py", line 122, in main
    status = self.run(options, args)
  File "/usr/lib/python3/dist-packages/pip/commands/install.py", line 278, in run
    requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
  File "/usr/lib/python3/dist-packages/pip/req.py", line 1178, in prepare_files
    url = finder.find_requirement(req_to_install, upgrade=self.upgrade)
  File "/usr/lib/python3/dist-packages/pip/index.py", line 277, in find_requirement
    raise DistributionNotFound('No distributions at all found for %s' % req)
pip.exceptions.DistributionNotFound: No distributions at all found for virtualenv

任何关于我如何解决这个问题的提示都会很棒。提前致谢。

【问题讨论】：

标签： python python-3.x pip

【解决方案1】：

pip3没有virtualenv，但是用python3搭建新环境很方便

你用普通pip安装它

pip install virtualenv

配置新的 virtualenv 以使用 python3

virtualenv -p python3 envname

【讨论】：

在您回复时我实际上已经想通了，但现在尝试在我的 virtualenv 中使用 pip 并且我仍然遇到超时错误。连接被 'ConnectTimeoutError(, 'Connection to pypi.python.org 超时。(connect timeout=15)')': /simple/cassandra-driver/
您是否激活了环境，您是否在环境中使用pip3？
我已经激活了环境，我使用的是 pip 而不是 pip3，也许这就是问题所在？ pip --version 产生：pip 7.1.2 来自 /var/virtualenvs/backend/lib/python3.4/site-packages (python 3.4)
我现在正坐在窗边。一切都对 python 很古怪。几个小时后我到家可以帮你
您应该将该问题标记为正确，针对您的特定问题打开一个新问题。问题转移话题不好。