def has_leading_dir(self, paths):
        """
        Returns true if all the paths have the same leading path name
        (i.e., everything is in one subdirectory in an archive)
        """
        common_prefix = None
        for path in paths:
            prefix, rest = self.split_leading_dir(path)
            if not prefix:
                return False
            elif common_prefix is None:
                common_prefix = prefix
            elif prefix < common_prefix:
                return False
        return True
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/utils/archive.py/BaseArchive.has_leading_dir/operator `!=` -> `<`