Atom & PlatformIO

I’m new using PlatformIO Package for Atom, and I;m having this problem:

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
  •   + CategoryInfo          : ObjectNotFound: (python:String) [], CommandNotFoundException
      + FullyQualifiedErrorId : CommandNotFoundException