win下python2與python3共存

1.先下載py2和py3   2.添加環境變量       3.在Path（系統變量）添加值（中間要分號隔開）:   1.c:\Python27 2.c:\Python27\Scripts 3.C:\Users\Administrator\AppData\Local\Programs\Python\Python36 4.C:\Users\Administrator\AppData\Local\Pr

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