how to invoke a python script on a file code example

Example 1: run python program from command line

# press [windows] + [R] (on windows only)
# use the command : cd/the_way_of_your_program
# and now use this command :

py the_name_of_your_program.py 

# don't forget to write the extension (py for python) 
# at the end of your program name

Example 2: how to run python program

move to the directory where your program lies 
open cmd 
python first_script.py(your file name)