vmdkops_admin.py 文件源码

def make_list_of_values(allowed):
    """
    Take a list of allowed values for an option and return a function that can be
    used to typecheck a string of given values and ensure they match the allowed
    values.  This is required to support options that take comma separated lists
    such as --rights in 'tenant set --rights=create,delete,mount'
    """

    def list_of_values(string):
        given = string.split(',')
        for g in given:
            if g not in allowed:
                msg = (
                    'invalid choices: {0} (choices must be a comma separated list of '
                    'only the following words \n {1}. '
                    'No spaces are allowed between choices.)').format(g, repr(allowed).replace(' ', ''))
                raise argparse.ArgumentTypeError(msg)
        return given

    return list_of_values