What is “argv”, and what does it do?

Question

argv

What on Earth is it!?

Edit: If you can, will you please write a line or two and explain how it works?

Answer 1

You can run python program with or without arguments. If you use arguments they are inside argv vector. For example

PYTHON PROGRAM!!!

#!/usr/bin/python

import sys

print 'Number of arguments:', len(sys.argv), 'arguments.'
print 'Argument List:', str(sys.argv)

RUN SCRIPT LIKE THIS

$ python test.py arg1 arg2 arg3

AND RESULT IS

Number of arguments: 4 arguments.
Argument List: ['test.py', 'arg1', 'arg2', 'arg3']

examples are from tutorialspoint