help.py 文件源码

def get_command_signature(self, prefix, cmd):
        """Create a user friendly command signature"""
        result = []
        params = cmd.clean_params
        parent = cmd.full_parent_name
        name = prefix + cmd.name if not parent else prefix + parent + ' ' + cmd.name
        result.append(name)

        # Format arguments to display which are required and which are optional
        if len(params) > 0:
            for name, param in params.items():
                if param.default is not param.empty:
                    result.append('[{}]'.format(name))
                elif param.kind == param.VAR_POSITIONAL:
                    result.append('[{}...]'.format(name))
                else:
                    result.append('<{}>'.format(name))
        return(' '.join(result))