TypeError: find_element() 接受 1 到 3 个位置参数，但给出了 5 个答案

【问题标题】：TypeError: find_element() takes from 1 to 3 positional arguments but 5 were givenTypeError: find_element() 接受 1 到 3 个位置参数，但给出了 5 个
【发布时间】：2020-10-28 10:11:33
【问题描述】：

尝试打开登录页面并登录，此时以server_id=... 结尾的链接将可用，这是一个用于编辑我的服务器列表的面板，然后我想单击底部的更新按钮。我是否正确使用了By？

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

driver = webdriver.Chrome(executable_path='C:/bin/chromedriver.exe')

driver.get('https://minecraft-server-list.com/login/login.php')

WebDriverWait(driver, 3).until(
    expected_conditions.text_to_be_present_in_element(
        By.NAME, 'username') or
    expected_conditions.text_to_be_present_in_element(
        By.CLASS_NAME, 'column-heading'))

if expected_conditions.text_to_be_present_in_element(
        By.NAME, 'username'):

    user = driver.find_element_by_name('username')
    pw = driver.find_element_by_name('password')

    user.clear()
    user.send_keys('redacted')
    pw.clear()
    pw.send_keys('redacted')

    driver.find_element_by_name('Submit').click()

    WebDriverWait(driver, 3).until(
        expected_conditions.text_to_be_present_in_element(
            By.CLASS_NAME, 'column-heading'))

    driver.get('https://minecraft-server-list.com/login/edit_server.php?server_id=redacted')

    WebDriverWait(driver, 3).until(
        expected_conditions.text_to_be_present_in_element(
            By.CLASS_NAME, 'serverdatadiv1'))

    driver.find_element_by_name('button').click()

    driver.quit()

elif expected_conditions.text_to_be_present_in_element(
        By.CLASS_NAME, 'column-heading'):
    driver.get('https://minecraft-server-list.com/login/edit_server.php?server_id=redacted')

    WebDriverWait(driver, 3).until(
        expected_conditions.text_to_be_present_in_element(
            By.CLASS_NAME, 'serverdatadiv1'))

    driver.find_element_by_name('button').click()

    driver.quit()

driver.quit()

完全错误：

Traceback (most recent call last):
  File "C:/Users/veggie/Desktop/devshit/projects/mcslUpdater/main.py", line 14, in <module>
    By.CLASS_NAME, 'column-heading'))
  File "C:\Users\veggie\Anaconda3\lib\site-packages\selenium\webdriver\support\wait.py", line 71, in until
    value = method(self._driver)
  File "C:\Users\veggie\Anaconda3\lib\site-packages\selenium\webdriver\support\expected_conditions.py", line 209, in __call__
    element_text = _find_element(driver, self.locator).text
  File "C:\Users\veggie\Anaconda3\lib\site-packages\selenium\webdriver\support\expected_conditions.py", line 411, in _find_element
    return driver.find_element(*by)
TypeError: find_element() takes from 1 to 3 positional arguments but 5 were given

【问题讨论】：

标签： python-3.x selenium selenium-webdriver webdriverwait expected-condition

【解决方案1】：

WebDriverWait 中似乎有错字。

根据定义，element_to_be_clickable() 应该在 tuple 中调用，因为它不是一个函数，而是一个类，其中初始化程序只期望 1隐式self参数：

class element_to_be_clickable(object):
    """ An Expectation for checking an element is visible and enabled such that you can click it."""
    def __init__(self, locator):
        self.locator = locator

    def __call__(self, driver):
        element = visibility_of_element_located(self.locator)(driver)
        if element and element.is_enabled():
            return element
        else:
            return False

所以，有效地代替：

elif expected_conditions.text_to_be_present_in_element(
    By.CLASS_NAME, 'column-heading'):

你需要：

elif WebDriverWait(driver, 3).until((expected_conditions.text_to_be_present_in_element(
    By.CLASS_NAME, 'column-heading'))):

同样，您必须更改WebDriverWait 的其他实例。

参考

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