Links: PYTHON - PROGRAMMING
Rel:
Ref: docs; complex applications; values from environment variables Tags: #public

command-line interfaces

---

pip install click

---

import click

pip install --editable .

---

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 x in range(count):
        click.echo('Hello %s!' % name)

if __name__ == '__main__':
    hello()

groups:

import click

@click.group()
def cli():
    pass

@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 x in range(count):
        click.echo('Hello %s!' % name)

@click.command()
def helloworld():
    click.echo('Hello World')


cli.add_command(hello)
cli.add_command(helloworld)

if __name__ == '__main__':
    cli()

---

how does the pass context work???

class Something:
    def __init__(self, name='something', etc=None):
        self.name = name
        self.etc = etc
        print('Something.__init__() !!!')




pass_sm = click.make_pass_decorator(Something, ensure=True)

@click.command()
@pass_sm
def sampl(sm):
    print(sm)

@click.command()
@pass_sm
def sampl2(sm):
    print(sm)
    sampl(sm)


TypeError: 'Something' object is not iterable
-> sm=sm ...
TypeError: __init__() got an unexpected keyword argument 'sm'

---

setattr reqirement for any meta-defined commands

    # setattr(sys.modules[__name__], 'attr1', 'attr1') {: id="setattr(sys.modules[--name--],-'attr1',-'attr1')" }