单击：在带有上下文对象的链接命令中使用其他功能

如果您可以编辑单击命令功能，则可以按以下方式组织它们：

@cli.command()
@click.argument('some_argument', type=str)
@click.pass_context
def say_something(ctx, some_argument):
    return _say_something(ctx, some_argument):

def _say_something(ctx, some_argument):
    print(some_argument)

如果像这样构建，则可以将_say_something()函数作为未修饰的（正常）Python函数进行调用。

如果无法编辑命令

在此答案的基础上，您可以使用以下功能将上下文传递给另一个click命令：

码：

def call_click_command_with_ctx(cmd, ctx, *args, **kwargs):
    """ Wrapper to call a click command with a Context object

    :param cmd: click cli command function to call
    :param ctx: click context
    :param args: arguments to pass to the function
    :param kwargs: keyword arguments to pass to the function
    :return: None
    """

    # monkey patch make_context
    def make_context(*some_args, **some_kwargs):
        child_ctx = click.Context(cmd, parent=ctx)
        with child_ctx.scope(cleanup=False):
            cmd.parse_args(child_ctx, list(args))
        return child_ctx

    cmd.make_context = make_context
    prev_make_context = cmd.make_context

    # call the command
    call_click_command(cmd, *args, **kwargs)

    # restore make_context
    cmd.make_context = prev_make_context

这是如何运作的？

之所以可行，是因为click是一个设计良好的OO框架。@click.Command可以对对象进行自省以确定其期望的参数。然后可以构造一个命令行，该命令行看起来像单击所期望的命令行。另外，make_context可以重写命令的方法以允许命令上下文使用命令。

来自上一个答案的代码：

def call_click_command(cmd, *args, **kwargs):
    """ Wrapper to call a click command

    :param cmd: click cli command function to call
    :param args: arguments to pass to the function
    :param kwargs: keywrod arguments to pass to the function
    :return: None
    """

    # Get positional arguments from args
    arg_values = {c.name: a for a, c in zip(args, cmd.params)}
    args_needed = {c.name: c for c in cmd.params
                   if c.name not in arg_values}

    # build and check opts list from kwargs
    opts = {a.name: a for a in cmd.params if isinstance(a, click.Option)}
    for name in kwargs:
        if name in opts:
            arg_values[name] = kwargs[name]
        else:
            if name in args_needed:
                arg_values[name] = kwargs[name]
                del args_needed[name]
            else:
                raise click.BadParameter(
                    "Unknown keyword argument '{}'".format(name))


    # check positional arguments list
    for arg in (a for a in cmd.params if isinstance(a, click.Argument)):
        if arg.name not in arg_values:
            raise click.BadParameter("Missing required positional"
                                     "parameter '{}'".format(arg.name))

    # build parameter lists
    opts_list = sum(
        [[o.opts[0], str(arg_values[n])] for n, o in opts.items()], [])
    args_list = [str(v) for n, v in arg_values.items() if n not in opts]

    # call the command
    cmd(opts_list + args_list)

测试代码：

import click

@click.group(chain=True)
@click.option('--some_common_option', type=float, default=1e-10)
@click.pass_context
def cli(ctx, some_common_option):
    # save shared params within context object for different commands
    for k, v in locals().items():
        if 'ctx' not in k:
            ctx.obj[k] = v


@cli.command()
@click.argument('some_argument', type=str)
@click.pass_context
def say_something(ctx, some_argument):
    print(some_argument)


@cli.command()
@click.argument('some_other_argument', type=str)
@click.pass_context
def say_more(ctx, some_other_argument):
    ctx.obj['text'] = some_other_argument
    call_click_command_with_ctx(say_something, ctx, ctx.obj['text'])


if __name__ == "__main__":
    commands = (
        'say_something something',
        'say_more more',
        '--help',
    )

    import sys, time

    time.sleep(1)
    print('Click Version: {}'.format(click.__version__))
    print('Python Version: {}'.format(sys.version))
    for cmd in commands:
        try:
            time.sleep(0.1)
            print('-----------')
            print('> ' + cmd)
            time.sleep(0.1)
            cli(cmd.split(), obj={})

        except BaseException as exc:
            if str(exc) != '0' and \
                    not isinstance(exc, (click.ClickException, SystemExit)):
                raise

结果：

Click Version: 6.7
Python Version: 3.6.3 (v3.6.3:2c5fed8, Oct  3 2017, 18:11:49) [MSC v.1900 64 bit (AMD64)]
-----------
> say_something something
something
-----------
> say_more more
more
-----------
> --help
Usage: test.py [OPTIONS] COMMAND1 [ARGS]... [COMMAND2 [ARGS]...]...

Options:
  --some_common_option FLOAT
  --help                      Show this message and exit.

Commands:
  say_more
  say_something