为什么我不能从我的命令提示符中 运行 python 代码?

Why can't I run python code from my command prompt?

import : The term 'import' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the 
spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:1
+ import
+ ~~~~~~
    + CategoryInfo          : ObjectNotFound: (import:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

您必须先 运行 Python 解释器。

键入“python”并按 Enter。