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python - Selenium Python get_element by ID 失败

问题描述

有人可以帮我理解为什么我的代码无法通过 ID 找到元素。下面的代码：

from selenium import webdriver
driver=webdriver.Firefox()
driver.get('https://app.waitwhile.com/checkin/lltest3/user')
element = driver.find_element_by_id("guestPhone")

检查元素清楚地显示 ID。

<input type="tel" name="guestPhone" id="guestPhone" class="form-control ng-pristine ng-empty ng-invalid ng-invalid-phone-validator ng-invalid-required ng-touched" ng-model="form.model" ng-model-options="{ 'updateOn': 'default blur', 'debounce': { 'default': 350, 'blur': 0 } }" uib-typeahead="guest.phone for guest in form.onChange({value:$viewValue})" typeahead-min-length="6" typeahead-on-select="form.onSelect({guest:$item})" typeahead-select-on-exact="true" uib-tooltip="Please enter valid number. Include country code for non-US numbers" tooltip-trigger="'none'" tooltip-is-open="(form.guestForm.$submitted || form.guestForm.guestPhone.$touched) &amp;&amp; form.guestForm.guestPhone.$invalid" tooltip-placement="bottom" ng-required="::form.required" phone-validator="US" placeholder="Mobile phone" title="Please enter a valid phone number" autocomplete="nope" next-on-enter="" aria-autocomplete="list" aria-expanded="false" aria-owns="typeahead-47-2884" required="required" style="">

PS 我也尝试过 XPath 和名称。仍然没有运气。

标签： pythonseleniumselenium-webdriverselenium-chromedriver

解决方案

您需要等待元素在页面上可见。您可以知道这是动态加载的，因为如果您右键单击 chrome 中的页面并查看源代码，您将看到没有 guestPhone 元素。它使用 javascript 加载

这是来自http://isaacviel.name/make-web-driver-wait-element-become-visiable/的示例：

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 as EC

driver = webdriver.Firefox()
driver.get("http://somedomain/url_that_delays_loading")
try:
    element = WebDriverWait(driver, 10).until(
        EC.visibility_of_element_located((By.ID, "myDynamicElement"))
    )
finally:
    driver.quit()

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