Python：Selenium“沒有這樣的元素”XPath 或 ID

Question

我正在嘗試登錄 Tessco.com 我了解到該站點使用 JavaScript，這就是我無法使用 RoboBrowser 找到表單的原因。

我現在正在使用硒。 我使用了兩種方法在字段中輸入信息。 一、使用driver.find_element_by_xpath()以及driver.find_element_by_id()

兩次嘗試都會產生錯誤。 代碼如下：

import time
from selenium import webdriver
chrome_path = r"C:\Users\James\Documents\Python Scripts\jupyterNoteBooks\ScrapingData\chromedriver_win32\chromedriver.exe"
driver = webdriver.Chrome(chrome_path)
driver.get("https://www.tessco.com/login")

userName = "FirstName.SurName321123@gmail.com"
password = "PasswordForThis123"

elem = driver.find_element_by_xpath("""//*[@id="userID"]""")
elem = send_keys(userName)

elem = driver.find_element_by_xpath("""//*[@id="password"]""")
elem = send_keys(password)

driver.close()

錯誤是：

NoSuchElementException: Message: no such element: Unable to locate element: {"method":"xpath","selector":"//*[@id="userID"]"}

當我使用 ID 調用元素時：

elem = driver.find_element_by_id("userID")
elem = send_keys(userName)

elem = driver.find_element_by_id("password")
elem = send_keys(password)

我得到：

NoSuchElementException: Message: no such element: Unable to locate element: {"method":"css selector","selector":"[id="userID"]"}

我的印象是我檢查了元素並使用了適當的名稱。

我沒有正確做的任何提示或想法？

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下面評論部分提供了解決方案。 代碼修改為：

import time
from selenium import webdriver
#Webdriver wait functions being introduced to add a delay.
#I was running into problems, with the ID not being found
#add wait for the element to be clickable before trying send keys
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

chrome_path = r"C:\Users\James\Documents\Python Scripts\jupyterNoteBooks\ScrapingData\chromedriver_win32\chromedriver.exe"
driver = webdriver.Chrome(chrome_path)
driver.get("https://www.tessco.com/login")

userName = "FirstName.SurName321123@gmail.com"
password = "PasswordForThis123"

wait = WebDriverWait(driver, 10)

elem = wait.until(EC.element_to_be_clickable((By.ID, "userID"))) 
elem.send_keys(userName)

elem = wait.until(EC.element_to_be_clickable((By.ID, "password"))) 
elem.send_keys(password)

driver.close()

Answer 1

該元素最初可能不可見，這可能會導致失敗。 等到元素可見/可點擊，然后使用發送鍵。

WebDriverWait(driver, 10).until(EC.element_to_be_clickable((By.ID, "userID"))).send_keys(userName)

Answer 2

我猜元素搜索發生在它加載之前。 我的建議是嘗試等待一段時間，它應該會起作用。