请求成功后，Response 验证签名失败 about alipay HOT 9 CLOSED

alipay = AliPay(
    appid="xxxxx",
    app_notify_url=None, 
    app_private_key_path="xxx",
    alipay_public_key_path="xxx",
    sign_type="RSA2"
)

result = alipay.api_alipay_fund_trans_toaccount_transfer(
    datetime.now().strftime("%Y%m%d%H%M%S%f"),
    payee_type="ALIPAY_LOGONID",
    payee_account="xxxxxxxxxx",
    amount=3.12
)

    def _verify(self, raw_content, signature):
        # 开始计算签名
        key = self.alipay_public_key
        signer = PKCS1_v1_5.new(key)
        if self._sign_type == "RSA":
            digest = SHA.new()
        else:
            digest = SHA256.new()
        digest.update(raw_content.encode("utf8"))
        if signer.verify(digest, decodebytes(signature.encode("utf8"))):
            return True
        return False