使用pip并通过多个python安装来安装软件包

Question

I have been using Anaconda python on Windows 7, but a package I need isn't supported by Anaconda python, so I installed CPython from python.org. I'd like to install the package to CPython, but pip still installs everything to C:\\Anaconda\\ ...\\site-packages . How can I change this?

Answer 1

Just change your PATH environment variable to put C:\\PythonXX\\Scripts (where XX is the version of Python, usually 27 or 34 ) at the beginning.

Click on My Computer -> Properties -> System Properties -> Advanced -> Environment Variables , then select Path in either the System Variables section (if you have Administrator access), or User Variables if you don't. Click Edit and put the correct path at the beginning, followed by a semi-colon ; . Save everything, close your command line session(s), then start a new one. Running pip -V should now print the CPython version and location instead of the Anaconda one.

Answer 2

If you have Anaconda installed, an easier way to modify your PATH is to use the activate and deactivate scripts.

activate envname

will put the envname environment on your PATH, and

deactivate

will remove it.

Hence, you just need to call activate before calling pip .