为什么在尝试设置 virtualenv 时出现此错误（与 pip 和 easy_install 相关）？

Question

我正在尝试创建一个 Flask 应用程序来推送到 Heroku。当我尝试在文件夹中创建 virtualenv 时，我抛出了这个错误：

photo-crawl › sudo virtualenv venv --distribute
Password:
New python executable in venv/bin/python
Installing distribute............................................................................................................................................................................................................................done.
Installing pip....
  Complete output from command /Users/evansiegel/In...rawl/venv/bin/python -x /Users/evansiegel/In...env/bin/easy_install /Library/Python/2.7/...ort/pip-1.2.1.tar.gz:
  /Users/evansiegel/Involvio/photo-crawl/venv/bin/python: can't open file '/Users/evansiegel/Involvio/photo-crawl/venv/bin/easy_install': [Errno 2] No such file or directory
----------------------------------------
...Installing pip...done.
Traceback (most recent call last):
  File "/usr/local/bin/virtualenv", line 9, in <module>
    load_entry_point('virtualenv==1.8.4', 'console_scripts', 'virtualenv')()
  File "/Library/Python/2.7/site-packages/virtualenv.py", line 964, in main
    never_download=options.never_download)
  File "/Library/Python/2.7/site-packages/virtualenv.py", line 1076, in create_environment
    install_pip(py_executable, search_dirs=search_dirs, never_download=never_download)
  File "/Library/Python/2.7/site-packages/virtualenv.py", line 667, in install_pip
    filter_stdout=_filter_setup)
  File "/Library/Python/2.7/site-packages/virtualenv.py", line 1042, in call_subprocess
    % (cmd_desc, proc.returncode))
OSError: Command /Users/evansiegel/In...rawl/venv/bin/python -x /Users/evansiegel/In...env/bin/easy_install /Library/Python/2.7/...ort/pip-1.2.1.tar.gz failed with error code 2

似乎出于某种原因virtualenv 没有将它应该放入的所有内容放入venv/bin 文件夹中。目前，只有python 和两个别名python2 和python2.7 在那里。

谢谢！

Answer 1

我认为这是由旧版本的 virtualenv 和/或 pip 中的错误引起的。看起来您正在使用 virtualenv 1.8.4 和 pip 1.2.1。是否可以升级到最新的 virtualenv 和 pip（当前 virtualenv 1.9.1 和 pip 1.3.1）？

如果您有安装权限，应该这样做：

pip install pip --upgrade
pip install virtualenv --upgrade

此时运行相同的命令（即sudo virtualenv venv --distribute）应该会给你想要的。