如何使用python-click为同一组中的cmd使用相同的选项

Question

I have code like below, both foo and bar have a user option and I need to write:

@click.option('--user', default='*')

twice for each function.

But I actually have a lot of cmds like this, so it is a lot of repeated code.

@click.group(help="cmd group")
def main():
    pass


@click.command(name='foo')
@click.option('--user', default='*')
def foo(user):
    click.secho(user, fg='green')


@click.command(name='bar')
@click.option('--user', default='*')
def bar(user):
    click.secho(user, fg='green')


main.add_command(foo)
main.add_command(bar)

What I want is to add the same option to one place in the group of cmd. ow can I do this using click?

Answer 1

pass it in the context:

@click.group(help="cmd group")
@click.option('--user', default='*')
@click.pass_context
def main(ctx, user):
    ctx.obj = {'user': user}


@click.command(name='foo')
@click.pass_context
def foo(ctx):
    click.secho(ctx.obj['user'], fg='green')


@click.command(name='bar')
@click.pass_context
def bar(ctx):
    click.secho(ctx.obj['user'], fg='green')


main.add_command(foo)
main.add_command(bar)

mycli --user cats bar will echo cats from the bar subcommand

Answer 2

Method 1. I suppose the name of first parameter of @click.option() is para .

USER_DEFAULT = {'para' : '--user', 'default' : '*'}

@click.option(**USER_DEFAULT)

Method 2. Wrap it in you own decorator filled with default parameters.