在Mac OS X 10.8.4上使用自制程序和pip安装VirtualEnv

Question

当我使用homebrew+pip安装virtualenv时，我收到以下警告：

$ sudo pip install virtualenv
Downloading/unpacking virtualenv
  Downloading virtualenv-1.10.1.tar.gz (1.3MB): 1.3MB downloaded
  Running setup.py egg_info for package virtualenv

    warning: no files found matching '*.egg' under directory 'virtualenv_support'
    warning: no previously-included files matching '*' found under directory 'docs/_templates'
    warning: no previously-included files matching '*' found under directory 'docs/_build'
Installing collected packages: virtualenv
  Running setup.py install for virtualenv

    warning: no files found matching '*.egg' under directory 'virtualenv_support'
    warning: no previously-included files matching '*' found under directory 'docs/_templates'
    warning: no previously-included files matching '*' found under directory 'docs/_build'
    Installing virtualenv script to /usr/local/bin
    Installing virtualenv-2.7 script to /usr/local/bin
Successfully installed virtualenv
Cleaning up...

看起来virtualenv已经安装并且正在工作（virtualenv命令可以工作等） 但是这些警告意味着什么？virtualenv_支持到底是什么？我应该担心他们吗？

Answer 1

这是Python的setuptools在安装virtualenv时发出的警告；在自制程序之外安装时也会发生这种情况。其实这不是问题。在