Can't run python after downloading script.

I am the newest of the newbs. Just learning how to navigate atom and python and I can't seem to test code in atom, so, I would like help. I ran a simple test
print('my name') and got the following errors:

Error 1 "'python' is not recognized as an internal or external command,
operable program or batch file.
'python' is not recognized as an internal or external command,
operable program or batch file.
[Finished in 0.063s]
[Finished in 0.066s]"

Error 2 "'python' is not recognized as an internal or external command,
operable program or batch file.
[Finished in 0.066s]
^C
^C"

I have python downloaded on my windows 7 pc, and I have the shell for practice, but it's a hassle going in an out of atom, which of course is far superior. Please help!

El informe menciona Atom, Python y Windows 7, pero ningún archivo del repositorio, prueba ni punto de entrada. Reproduce el fallo indicado “python is not recognized” desde la acción de ejecución de Atom y, después, inspecciona cómo este paquete resuelve los ejecutables. Se considera completado cuando haya una corrección confirmada o una resolución documentada para ejecutar Python dentro de Atom.

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