helloclick.py

import click

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

mkvenv_command = lambda f: pew.command()(
    click.option('--python', '-p', default='python')(
        click.option('-i', multiple=True)(f)))

@mkvenv_command
@click.argument('envname')
def new(envname, python, i):
    print(envname, python, i)

@mkvenv_command
def mktmpenv(python, i):
    print(python, i)

if __name__ == '__main__':
    pew()