Python多线程使用问题（exit code -1073741819）

是这样的，我在开发一个给开客户用的批量订购小应用。基于Python Pyside6
在做多节点询价的时候希望用多线程实现快速询价，以及后续的订购。

    @Slot()
    def queryPrice(self):
        checkedbox = []
        for i in self.checkboxlist:
            if i.isChecked():
                checkedbox.append(i)
        if len(checkedbox) == 0 :
            QMessageBox.information(self,"提示","请优先勾选节点")
        else:
            self.ui.textEditArea.setMarkdown(self.ui.textEditArea.toMarkdown() + "⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐")
            # queryPriceClient = VmqueryPriceSample
            # request = VmqueryPriceRequest
            # self.pool.map(self.multiquerypricetask,checkedbox)
**            pool = Pool(processes=8)
            pool.map(self.multiquerypricetask,checkedbox)**
            # self.multiquerypricetask(checkedbox)
            self.ui.textEditArea.setMarkdown(self.ui.textEditArea.toMarkdown() + "⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐")
            self.ui.queryPriceBtn.setEnabled(False)


    def multiquerypricetask(self,checkedcity):
         # for checkedcity in checkedbox:
            ak = self.ui.acccesskeyLineEdit.text().strip()
            sk = self.ui.secretkeyLineEdit.text().strip()
            client = VmCreateapiSample.create_client(ak, sk, self.rgnCheckboxdict[checkedcity])
            request = VmqueryPriceRequest()
            boot_volume = VmqueryPriceRequestBootVolume()
            vmquery_price_body = VmqueryPriceBody()
            vmquery_price_body.product_type = "vm"
            if self.ui.bootVolumeTypeComboBox.currentText() == "高性能型硬盘":
                boot_volume.volume_type = "highPerformance"
            else:
                boot_volume.volume_type = "performanceOptimization"
            if self.ui.billingTypeComboBox.currentText() == "按月支付（包月）":
                vmquery_price_body.fee_unit = "month"
            elif self.ui.billingTypeComboBox.currentText() == "按年支付（包年）":
                vmquery_price_body.fee_unit = "year"
            else:
                vmquery_price_body.fee_unit = "hour"
            boot_volume.size = int(self.ui.bootVolumeSizeLineEdit.text())
            vmquery_price_body.duration = int(self.ui.durationSpinBox.value())
            vmquery_price_body.boot_volume = boot_volume
            vmquery_price_body.quantity = int(self.ui.quantitySpinBox.value())
            vmquery_price_body.specs_name = self.ui.specsNameLineEdit.text().strip()
            request.vmquery_price_body = vmquery_price_body
            print("%s节点开始询价" % (self.realnamedict[checkedcity]))
            res = client.vmquery_price(request)
            if res.body != None:
                price = float(res.body.server_price) + float(
                     res.body.boot_volume_price)
                print("%s节点询价完毕"%(self.realnamedict[checkedcity]))
                self.showMsgIntextArea("----------%s节点该配置价格为 %.2f元(只包含云主机和硬盘价格)" % (
                     self.realnamedict[checkedcity], price))
            else:
                print("%s节点询价失败" % (self.realnamedict[checkedcity]))
                self.showMsgIntextArea("----------%s节点询价失败。原因:%s" % (
                      self.realnamedict[checkedcity], res.error_message))

报错如下：华东-杭州节点开始询价华南-广州节点开始询价
华南-广州节点询价完毕
Process finished with exit code -1073741819 (0xC0000005)
广州节点询价完毕后程序直接没了

希望各位能分析下，这是什么原因。关键代码部分已经加粗了。刚接触到多线程。。
再次感谢

** pool = Pool(processes=8)
pool.map(self.multiquerypricetask,checkedbox)**

这两行~