Pass result of click.command to another function

Question

I am trying to implement basic command line functionality.

So I need to be able to pass file as argument, read it and pass result further.

But for some reason it doesn't work as expected.

import click


@click.command()
@click.argument('arg', nargs=1, type=click.File('r'))
def touch(arg):
    return len(arg.readlines())


def fill():
    print touch()


if __name__ == '__main__':
    fill()

There is no any output. But seems touch() is executing since in case if I am adding print statement into touch() I can see some stuff in output.

How can you execute touch() with no arguments if in you definition there is one required? — Ilja
– Ilja, Commented Mar 20, 2016 at 10:21

Community · Accepted Answer · 2017-05-23 12:07:47Z

1

Unfortunately, using click makes it such that your function never returns any value. you can use click.echo to print the values to the front-end, but you cannot return any values as it exits when function execution is finished. In other words, it no longer behaves as a function once you wrap it with click.command but instead becomes a command line program.

You can alternatively use optparse to achieve what you are trying to achieve.

Resources - https://docs.python.org/2/library/optparse.html

Edit:- I found a similar question here, you can also use this as reference - How do I return a value when @click.option is used to pass a command line argument to a function?

edited May 23, 2017 at 12:07

CommunityBot

11 silver badge

answered Mar 20, 2016 at 10:33

Namit Singal

1,51612 silver badges26 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Pass result of click.command to another function

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related