Selenium WebDriverException：期望'id'鼠标映射到其子类型未定义的InputState，得到：pointerMove

我对Selenium有一个问题，我无法理解 . 另外，我无法通过Google找到有关此问题的大量信息 .

我的Selenium脚本执行以下步骤：

• 登录Facebook .

• 转到朋友提案列表 .

• 向下滚动几次（为了加载更多提案） .

• 在控制台上逐一显示所有提案，并询问用户是否应添加该朋友 .

确认后，会创建一个Action链，该链将移至相关提案，然后单击添加按钮 .

但是Action链不起作用 . 我收到以下错误：

Potential friend name: 'John Doe'
Social context: 'Max Mustermann und 3 weitere gemeinsame Freunde'
Traceback (most recent call last):
  File "c:\...\facebook_selenium_minimal.py", line 74, in <module>
    main()
  File "c:\...\facebook_selenium_minimal.py", line 57, in main
    friend_add_button).perform()
  File "C:\Python36\lib\site-packages\selenium\webdriver\common\action_chains.py", line 77, in perform
    self.w3c_actions.perform()
  File "C:\Python36\lib\site-packages\selenium\webdriver\common\actions\action_builder.py", line 76, in perform
    self.driver.execute(Command.W3C_ACTIONS, enc)
  File "C:\Python36\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 238, in execute
    self.error_handler.check_response(response)
  File "C:\Python36\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 193, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: Expected 'id' mouse to be mapped to InputState whose subtype is undefined, got: pointerMove

这是我的Selenium脚本：

import time

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.common.exceptions import TimeoutException
from selenium.webdriver.support.ui import WebDriverWait  # available since 2.4.0
from selenium.webdriver.support import expected_conditions as EC  # available since 2.26.0
from selenium.webdriver.common.action_chains import ActionChains

TIMEOUT = 5

def main():
    driver = webdriver.Firefox()
    driver.get("http://www.facebook.com")

    print(driver.title)

    input_mail = driver.find_element_by_id("email")
    input_password = driver.find_element_by_id("pass")

    input_mail.send_keys("your_login@example.com")
    input_password.send_keys("your_password")
    input_password.submit()

    try:
        WebDriverWait(driver, TIMEOUT).until(
            EC.visibility_of_element_located((By.NAME, "requests")))

        driver.get("https://www.facebook.com/friends/requests/?fcref=jwl")

        WebDriverWait(driver, TIMEOUT).until(
            EC.visibility_of_element_located((By.ID, "fbSearchResultsBox")))

        # Let Facebook load more friend proposals.
        for i in range(2):
            driver.execute_script("window.scrollTo(0, document.body.scrollHeight)")
            time.sleep(1.0)

        friend_proposals = driver.find_elements_by_class_name(
            "friendBrowserListUnit")

        for friend_proposal in friend_proposals:
            try:
                friend_title = friend_proposal.find_element_by_class_name(
                    "friendBrowserNameTitle")
            except NoSuchElementException:
                print("Title element could not be found. Skipping.")
                continue

            print("Potential friend name: '%s'" % friend_title.text)

            social_context = friend_proposal.find_element_by_class_name(
                "friendBrowserSocialContext")
            social_context_text = social_context.text
            print("Social context: '%s'" % social_context_text)

            friend_add_button = friend_proposal.find_element_by_class_name(
                "FriendRequestAdd")

            actions = ActionChains(driver)
            actions.move_to_element(friend_proposal).move_to_element(
                friend_add_button).perform()
            time.sleep(0.1)

            print("Should I add the friend (y/N): ")
            response = input()
            if response == "y":
                friend_add_button.click()
                time.sleep(1.0)
                print("Added friend...")

    except TimeoutException as exc:
        print("TimeoutException: " + str(exc))
    finally:
        driver.quit()

if __name__ == '__main__':
    try:
        main()
    except:
        raise

我正在使用最新的Selenium版本：

C:\Users\Robert>pip show selenium
Name: selenium
Version: 3.3.1

我有带有geckodriver v0.15.0的Firefox 52.0.1 .

Update: 快速测试显示，相同的脚本与Chrome Webdriver完美配合 .

Update 2: Github上的Selenium bugtracker中的这个问题可能是相关的：https://github.com/SeleniumHQ/selenium/issues/3642