Coexistence environment of python3 and python2 under win7

Installing a package with pip
When executing pip2 install xxx, an error is reported
Fatal error in launcher: Unable to create process using '"'

The same error is reported when executing pip3 install xxx
Fatal error in launcher: Unable to create process using '"'


Solution
python2 -m pip install XXX
python3 -m pip install XXX

This will allow you to use pip to install the module properly

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