如何将安装包安装到不同版本的Python中

Question

I have 2 Python versions

• Python 3.4.3
• Python 2.7.10

Env variable works with Python 3.4(in my system), so when I pip install *package_name it will only install the package into Python 3.4

I have a system variable for Python 2.7 -- %python27% -- also.

My question is; how can I pip install a package/module into Python 2.7 without changing the Env. Variable.

Note: %python27% pip install *package_name doesn't work.

Thank you.

Answer 1

You should have multiple executables of pip.

Use pip2 and pip3 interchangeably.

Anyway, you should consider using virtualenv package, initialize it like virtualenv -p /usr/bin/python2.7 env_name or virtualenv-3.4 -p /usr/bin/python3.4 env_name then each time you use your code, type source env_name/bin/activate and "python" should be aliased to virtualised version.

Answer 2

You can use pip for python2 and pip3 for python3. Also you can try using virtualenv or pyenv

Answer 3

I had the same problem, but it was installing to Python 2.7 rather than Python 3.4. Using $ pip3 install *package_name solved the issue.