Running a simple .py or .pyw python file causes python.exe to show up under Task Manager.
python myApp.py
python myApp.pyw
How
Im not sure I understand your problem but I think this is what you need to know
you need to right click on a py or pyw file and select open with ... find python.exe (probably C:\Python27\python.exe) .. check the box that says always open ... now you can just double click it if you want to run it
(usually the installer sets this up for you ...)