def validate_mutually_exclusive()

in awscli/customizations/utils.py [0:0]

• 16 lines of code
• 12 McCabe index (conditional complexity)

def validate_mutually_exclusive(parsed_args, *groups):
    """Validate mutually exclusive groups in the parsed args."""
    args_dict = vars(parsed_args)
    all_args = set(arg for group in groups for arg in group)
    if not any(k in all_args for k in args_dict if args_dict[k] is not None):
        # If none of the specified args are in a mutually exclusive group
        # there is nothing left to validate.
        return
    current_group = None
    for key in [k for k in args_dict if args_dict[k] is not None]:
        key_group = _get_group_for_key(key, groups)
        if key_group is None:
            # If they key is not part of a mutex group, we can move on.
            continue
        if current_group is None:
            current_group = key_group
        elif not key_group == current_group:
            raise ValueError('The key "%s" cannot be specified when one '
                             'of the following keys are also specified: '
                             '%s' % (key, ', '.join(current_group)))