you don't need PyCharm!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
you can just from command line type: python file.py
If you want to use PyCharm, open PyCharm.
click new project
select the
directory containing the .py file as project name
look for the .py file in left window
double click on .py fiile
click run menu
select run (under run menu)
select .py file
Now, you have to had configured the python interpreter first
this can be done from the project as follows:
click help menu
click on find action
type: settings-->enter
click on Project->Project Interpreter
if you don't see your python interpreter listed in the window, click on pull down arrow
and choose the proper Interpreter
click ok
Now you can run as above