Question

我正在使用Python构建Selenium Chrome机器人。我实现了python协程的同步功能。使用Selenium wait方法和python的同步功能。

我遇到了一个错误，该错误不是我的预期。

我在下拉菜单A上选择了项目，请等待几秒钟，以便根据下拉菜单A中的项目值填充下拉菜单B。

此过程在python中包装了一个带有await的同步函数。它不会根据此行为循环。

但是一次全部运行。

异步定义

regionLists = ['111','222','333']
regionElem = self.browser.find_element_by_id("regionId")
regionSelect = Select(regionElem)
regionTasks = [
  self.parseCities(self.browser, regionSelect, regionValue)
  for regionValue in regionLists
]

result = await asyncio.wait(regionTasks)

ParseCities功能

async def parseCities(self, browser, regionSelect, regionValue):
  regionSelect.select_by_value(regionValue)

  # ERROR AT THIS LINE BELOW
  wait(browser, 10).until(
      lambda b: len(Select(b.find_element_by_id("cityId")).options) > 1
  )

错误

Task exception was never retrieved
future: <Task finished coro=<main.parseCities() done, defined at Selenium/main.py:139> exception=NoSuchElementException('Cannot locate option with value: 781111')>
Traceback (most recent call last):
  File "Selenium/main.py", line 140, in parseCities
    regionSelect.select_by_value(regionValue)
  File "/usr/local/lib/python3.7/site-packages/selenium/webdriver/support/select.py", line 87, in select_by_value
    raise NoSuchElementException("Cannot locate option with value: %s" % value)
selenium.common.exceptions.NoSuchElementException: Message: Cannot locate option with value: 781111

Answer 1

尝试等待元素可点击

只是示例

from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as ec

 element = WebDriverWait(driver, 30).until(
    ec.element_to_be_clickable((By.ID, 'cityId')))

  element.click()

硒等待异步功能

1 个答案: