我在Udemy上开设了python基础课程，并按照说明在PowerShell中执行了第一个start.py代码。
我在start.py所在的文件夹中打开了PowerShell。
PS C:\Users\burigs\Desktop\Desktop\Programming\Python\IntroToProgramming> python .\start.py
python : The term 'python' 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
+ python .\start.py
+ ~~~~~~
+ CategoryInfo : ObjectNotFound: (python:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException