command line arguments aws s3 ls - for example, aws cli is the python program, and the s3 ls are the command line arguments, command line arguments helps passing the values to the program program can take command line arguments as input

sys module - helps read the command line arguments inside your program By default arguments read as strings, we need to convert them to the integers sys reads the command line arguments

Environmental Variables for passwords and api keys, tokens, certificates(handles the senitive information) we won't do hardcoding, we won't pass in the senstive information using command line arguments export password="sudhamsh" to read the environment variables we use the os module

env vars Vs command line arguments