I want to able to open a command prompt at the folder which contains a python script and just type in the script name without the .py and watch it run.
Following the
Modify the PATHEXT variable to include Python scripts. For example, here's mine:
PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.PY
You can do this every time you open a command console, or just modify your user global environment variables so that every instance of cmd.exe will include it.