pep257.py 文件源码

def _validate_options(cls, options):
        """Validate the mutually exclusive options.

        Return `True` iff only zero or one of `BASE_ERROR_SELECTION_OPTIONS`
        was selected.

        """
        for opt1, opt2 in \
                itertools.permutations(cls.BASE_ERROR_SELECTION_OPTIONS, 2):
            if getattr(options, opt1) and getattr(options, opt2):
                log.error('Cannot pass both {0} and {1}. They are '
                          'mutually exclusive.'.format(opt1, opt2))
                return False

        if options.convention and options.convention not in conventions:
            log.error("Illegal convention '{0}'. Possible conventions: {1}"
                      .format(options.convention,
                              ', '.join(conventions.keys())))
            return False
        return True