how to run a file in powershell with python

[sparkz_alot]

You are mixing things up. To run your program you basically have two choices:
1) You need to navigate to the directory containing you file. then type the entire file name including the ".py"

For example

PS C:\Users\sparkz> cd c:\python
PS C:\python>ex1.py

2) In file explorer, navigate to your file and double-click it.
Notice your prompt is "PS C:\"
To use python in interactive mode, type "python" (if you have one version of python installed)

For example:

PS C:\> python
Python 3.6.1 (v3.6.1:69c0db5, Mar 21 2017, 18:41:36) [MSC v.1900 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>

Notice in this mode, your prompt is now ">>>"

To exit this mode and return to the command prompt, type "exit()" then Enter