Since, you are able to run Python in PowerShell. You can just do python <scriptName>.py to run the script. So, for a script named test.py containing
name = raw_input("Enter your name: ")
print "Hello, " + name
The PowerShell session would be:
Start:
cd C:\Python27
python test.py
Session transcript:
Enter your name: Monty Python
Hello, Monty Python