Python installation on multiple versions of Win7

1. Multiple Python versions

Installation from needless to say, Win7 under the installation of the corresponding MSI or EXE installation program can be

2. Environment variable Configuration 2.1 New Python's home directory, 3.4 version

2.2 Path added

%python_home%;%python_home%\scripts;

3. Toggle Python Version

Just modify the Python_home path, set to that version of the path, you are currently using that version of Python.

It is important to note that if you have a third-party library, each version of the third-party library is independent.

For example, the 3.4 version and the 2.7 version of Python need to be used to the requests library, you need to install the corresponding requests in two versions of the operating environment

Python installation on multiple versions of Win7