cli.py 文件源码

def pipeline(image, actions):
    """Allow chaining a series of actions to be applied to IMAGE.
    Output will depend on the last action applied.

    \b
    - ACTIONS is a JSON list of dictionaries containing each an 'action' key
      specifying the action to apply, a 'arguments' key which is a
      list of arguments, and a 'options' key with a dictionary to set the
      options for the corresponding action.

      Example::

        histonets pipeline '[{"action": "contrast", "options": {"value": 50}}]'
    """
    output = image.image
    for action in actions:
        ctx = click.get_current_context()
        arguments = [output] + action.get('arguments', [])
        command = main.get_command(ctx, action['action'])
        if command is None:
            raise click.BadParameter(
                "Action '{}' not found".format(action['action']))
        action_options = action.get('options', {})
        options = {param.name: action_options.get(param.name, param.default)
                   for param in command.params[:-2]}
        options['output'] = RAW
        try:
            output = command.callback(*arguments, **options)
        except TypeError as e:
            raise click.BadParameter(e)
    return output