Return a full path

def full_path(self, *args, **query):
        """Return a full path"""
        path = None
        if args:
            if len(args) > 1:
                raise TypeError("full_url() takes exactly 1 argument "
                                "(%s given)" % len(args))
            path = args[0]
        if not path:
            path = self.path
        elif not path.startswith('/'):
            path = remove_double_slash('%s/%s' % (self.path, path))
        return iri_to_uri(path, query)