Python not working in command prompt?

Question

I type python into the command line, but the command prompt says that python is not recognized as an internal or external command, operable program, or batch fi

Answer 1

I am probably the most novice user here, I have spent six hours just to run python in the command line in Windows 8. Once I installed the 64-bit version, then I uninstalled it and replaced it with 32-bit version. Then, I tried most suggestions here, especially by defining path in the system variables, but still it didn't work.

Then I realised when I typed in the command line: echo %path%

The path still was not directed to C:\python27. So I simply restarted the computer, and now it works.