Is this possible in python if run in cmd?

Question

If you have idea about linux bash, we can provide arguments in the same line in the terminal.

For Example in sed, the format is,

sed OPTIONS... [SCRIPT] [INPUTFILE...]

Let's say, to greet 'Hello' there is a python program, greet.py

Input in cmd (Suppose, my python file is reg. in env. path)
==========
greet Arun

Output
======
Hello Arun

Wondering, whether this is possible in python, any idea how to?

In addition to the linked duplicate, you might have tried putting something like `python read command line` [into a search engine](https://duckduckgo.com/?q=python+read+command+line). In fact, just about anything even vaguely related should work in a search engine. — Karl Knechtel, Apr 17 '21 at 10:04

score 1 · Accepted Answer · answered Apr 17 '21 at 10:03

I like to use click for commandline tools. Have a look at their documentation.

Here is an example of how it works:

hello.py:

import click

@click.command()
@click.option("--count", default=1, help="Number of greetings.")
@click.option("--name", prompt="Your name", help="The person to greet.")
def hello(count, name):
    """Simple program that greets NAME for a total of COUNT times."""
    for _ in range(count):
        click.echo(f"Hello, {name}!")

if __name__ == '__main__':
    hello()

commandline usage:

$ python hello.py --count=3
Your name: Click
Hello, Click!
Hello, Click!
Hello, Click!

score 0 · Answer 2 · answered Apr 17 '21 at 10:03

Yeah, this is possible with the sys library. in the sys.argv list it is present a list of the arguments passed to the python command. For example:

# This is greet.py
import sys
name = sys.argv[1]
print("Hello ", name)

So if you run python greet.py James it will print Hello James

Is this possible in python if run in cmd?

2 Answers2