Python CLI Arguments and flags

How to Pass Arguments to a Python Script from the Command Line

1 Unnamed args
2 Named args (eg -a -arg)

We'll design a Python program which takes a username, age and email as
arguments via cli and use them as inputs to our program

First we'll work with Unnamed args
we will invoke the script using cli as

Remember - filename is always the first argument
Now we'll invoke the script using the above method

Now let's move on to named args and invoke our program as either

OR

Remember u,a,e are shorthand for username, age and email which we can
use from cli. put a ":" after each of u,a and e as they all can accept value as input, in case of a read only arg don't use ":"