使用Pip命令安装virtualenv

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C:\Users\zhang>pip install virtualenv
Collecting virtualenv
  Downloading https://files.pythonhosted.org/p ... y2.py3-none-any.whl (2.6MB)
    100% |████████████████████████████████| 2.6MB 385kB/s
Installing collected packages: virtualenv
Successfully installed virtualenv-15.2.0
You are using pip version 9.0.3, however version 10.0.1 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

C:\Users\zhang>