variable.py 文件源码

def _string_expansion(self, name, value, explode, prefix):
        if value is None:
            return None

        tuples, items = is_list_of_tuples(value)

        if list_test(value) and not tuples:
            return ','.join(quote(v, self.safe) for v in value)

        if dict_test(value) or tuples:
            items = items or sorted(value.items())
            format_str = '%s=%s' if explode else '%s,%s'

            return ','.join(
                format_str % (
                    quote(k, self.safe), quote(v, self.safe)
                ) for k, v in items
            )

        value = value[:prefix] if prefix else value
        return quote(value, self.safe)