argparse - Printable Version

argparse - Printable Version

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argparse - 2skywalkers - May-15-2019

I have been playing with argparse for a a few hours and can't figure out something so simple.

import argparse
parser = argparse.ArgumentParser()

parser.add_argument("tst")

args = parser.parse_args()
print(args.tst)

What i then want to do is in linux:
python test_file_name.py hi

I then want to to print out "hi"
but i get this message instead:

"Error: unrecognized arguments: hi

RE: argparse - Larz60+ - May-15-2019

Works for me:

$ cat test_file_name.py 
import argparse

parser = argparse.ArgumentParser()

parser.add_argument("tst")

args = parser.parse_args()
print(args.tst)

Output:$ python test_file_name.py hi
hi

RE: argparse - 2skywalkers - May-15-2019

Ohh, I think I was using python 2, not 3. Thanks, sorry for wasting your time.

I do have another question, could I make it where I add a "-" and a letter after the dash, then put the message?
For example python test_file_name.py -t hi
Then it prints "hi"
I like the "-" as its what is used in linux a lot.

RE: argparse - snippsat - May-15-2019

(May-15-2019, 06:03 PM)2skywalkers Wrote: For example python test_file_name.py -t hi
Then it prints "hi"
I like the "-" as its what is used in linux a lot.

Sure but i don't use argparse,i can show you an other way with Click.
argparse is't bad it work well,just that i think Click dos a lot stuff better.

import click

@click.command()
@click.option('-t', '--string-to-echo', 'string')
def echo(string):
    click.echo(f'{string} or backwards {string[::-1]}')

if __name__ == '__main__':
    echo()

Output:λ python hello.py -t hello
hello or backwards olleh

A look at Click i had i while ago.

RE: argparse - Gribouillis - May-15-2019

I like plumbum.cli. Very easy to use.