Virtualenv: 在 Arch Linux 上使用 Python 3.3 崩溃

如果我从 Arch Linux AUR安装 Python 3.3，然后尝试打开一个 virtualenv，我会崩溃：

$ virtualenv -p python3.3 /tmp/foo
Running virtualenv with interpreter /usr/bin/python3.3
Using base prefix '/usr'
New python executable in /tmp/foo/bin/python3.3
Also creating executable in /tmp/foo/bin/python
Installing setuptools, pip, wheel...
  Complete output from command /tmp/foo/bin/python3.3 - setuptools pip wheel:
  Traceback (most recent call last):
  File "<stdin>", line 7, in <module>
  File "/usr/lib/python3.5/site-packages/virtualenv_support/pip-8.1.0-py2.py3-none-any.whl/pip/__init__.py", line 15, in <module>
  File "/usr/lib/python3.5/site-packages/virtualenv_support/pip-8.1.0-py2.py3-none-any.whl/pip/vcs/subversion.py", line 9, in <module>
  File "/usr/lib/python3.5/site-packages/virtualenv_support/pip-8.1.0-py2.py3-none-any.whl/pip/index.py", line 30, in <module>
  File "/usr/lib/python3.5/site-packages/virtualenv_support/pip-8.1.0-py2.py3-none-any.whl/pip/wheel.py", line 39, in <module>
  File "/usr/lib/python3.5/site-packages/virtualenv_support/pip-8.1.0-py2.py3-none-any.whl/pip/_vendor/distlib/scripts.py", line 14, in <module>
  File "/usr/lib/python3.5/site-packages/virtualenv_support/pip-8.1.0-py2.py3-none-any.whl/pip/_vendor/distlib/compat.py", line 66, in <module>
ImportError: cannot import name HTTPSHandler
----------------------------------------
...Installing setuptools, pip, wheel...done.
Traceback (most recent call last):
  File "/usr/lib/python3.5/site-packages/virtualenv.py", line 2311, in <module>
    main()
  File "/usr/lib/python3.5/site-packages/virtualenv.py", line 703, in main
    symlink=options.symlink)
  File "/usr/lib/python3.5/site-packages/virtualenv.py", line 936, in create_environment
    download=download,
  File "/usr/lib/python3.5/site-packages/virtualenv.py", line 892, in install_wheel
    call_subprocess(cmd, show_stdout=False, extra_env=env, stdin=SCRIPT)
  File "/usr/lib/python3.5/site-packages/virtualenv.py", line 787, in call_subprocess
    % (cmd_desc, proc.returncode))
OSError: Command /tmp/foo/bin/python3.3 - setuptools pip wheel failed with error code 1

该 AUR 包的评论中有一些关于与 SSL 相关的不同构建标志的讨论。 我的印象是包本身需要以某种方式修复，所以这次崩溃不是 virtualenv 的错。 但是，如果 virtualenv 知道这个潜在的错误，并且能够打印出有用的消息，那就太好了。 类似“SomethingSomething 包丢失，可能是因为您的 Python 版本是在没有 BlahBlahSSL 的情况下构建的。Virtualenv 不支持它。”