Take control of multiple Python installations in Windows with the py launcher, available as part of a standard Python installation.
More don't miss stories from InfoWorld page 41
More don't miss stories from InfoWorld page 41
More don't miss stories from InfoWorld page 41
PyCoder's Weekly
How to use Python's py launcher for Windows
How to install python with Pypy pip, ActiveState posted on the topic
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How to use Python's py launcher for Windows