selenium.common.exceptions.InvalidArgumentException： 消息： 无效参数： 使用 find_element('username') Seleniu

Question

我正在使用以下代码运行python 3.9。当我运行脚本时，我会收到错误消息。不确定我错过了什么。该元素称为username。

File "/Users/user/Documents/PycharmProjects/webscrapping/app/webscraping.py", line 19, in <module>
login = driver.find_element("username")   File "/Users/user/Documents/VENV/webscrapping/lib/python3.9/site-packages/selenium/webdriver/remote/webdriver.py", line 1244, in find_element
return self.execute(Command.FIND_ELEMENT, {   File "/Users/user/Documents/VENV/webscrapping/lib/python3.9/site-packages/selenium/webdriver/remote/webdriver.py", line 424, in execute
self.error_handler.check_response(response)
File "/Users/user/Documents/VENV/webscrapping/lib/python3.9/site-packages/selenium/webdriver/remote/errorhandler.py", line 247, in check_response
raise exception_class(message, screen, stacktrace) selenium.common.exceptions.InvalidArgumentException: Message: invalid argument: invalid locator   (Session info: chrome=98.0.4758.80) Stacktrace: 0   chromedriver                        0x0000000102a5c3c9 chromedriver + 5018569 1   chromedriver                        0x00000001029e7333 chromedriver + 4539187 2   chromedriver             0x00000001025bca88 chromedriver + 170632 3   chromedriver              0x00000001025f0d81 chromedriver + 384385 4   chromedriver              0x00000001025f14f1 chromedriver + 386289 5   chromedriver              0x00000001026238b4 chromedriver + 592052 6   chromedriver              0x000000010260e80d chromedriver + 505869 7   chromedriver              0x0000000102621604 chromedriver + 583172 8   chromedriver              0x000000010260e6d3 chromedriver + 505555 9   chromedriver              0x00000001025e495e chromedriver + 334174 10  chromedriver              0x00000001025e5935 chromedriver + 338229 11  chromedriver              0x0000000102a181ee chromedriver + 4739566 12  chromedriver             0x0000000102a31f51 chromedriver + 4845393 13  chromedriver             0x0000000102a37928 chromedriver + 4868392 14  chromedriver             0x0000000102a32a7a chromedriver + 4848250 15  chromedriver             0x0000000102a0cc31 chromedriver + 4693041 16  chromedriver             0x0000000102a4d978 chromedriver + 4958584 17  chromedriver             0x0000000102a4db01 chromedriver + 4958977 18  chromedriver             0x0000000102a63795 chromedriver + 5048213 19  libsystem_pthread.dylib  0x00007ff80f7a24f4 _pthread_start + 125 20  libsystem_pthread.dylib    0x00007ff80f79e00f thread_start + 15

代码试用：

import os
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
import time
CURRENT_DIR = os.getcwd()
print(f"Current Dir is {CURRENT_DIR}")
driver = webdriver.Chrome(f"{CURRENT_DIR}/chromedriver")
url = 'https://somewebsite.com/login2/'
driver.get(url)
time.sleep(2)
login = driver.find_element('username')
login.send_keys('[e-mail]')
login.send_keys(Keys.RETURN)
time.sleep(5)
driver.quit()

HTML正在尝试获取：

<div class="sc-dnqmqq jomEGJ" data-reactid=".0.1.0.2.1.0.0.0">
<label class="sc-iwsKbI hOobUj" for="username" data-reactid=".0.1.0.2.1.0.0.0.0">
<span data-reactid=".0.1.0.2.1.0.0.0.0.0">Username</span>
</label>
</div>

Answer 1

find_element((

find_element((查找一个给定By策略的元素和一个定位器，其中两个参数都是必需的。

因此，您必须传递By类，这是一组受支持的定位器策略以及定位器。

---

解决方案

实际上，你的代码行将是：

• 如果用户名是class属性的值：

  login = driver.find_element(By.CLASS_NAME, "username")
  

• 如果用户名是id属性的值：

  login = driver.find_element(By.ID, "username")
  

• 如果用户名是name属性的值：

  login = driver.find_element(By.NAME, "username")
  

• 如果用户名是linktext属性的值：

  login = driver.find_element(By.LINK_TEXT, "username")
  

Answer 2

import time
from selenium import webdriver
from selenium.webdriver.common.by import By
browser = webdriver.Chrome()
username = "Username"
password = "Password"
time.sleep(5)
url = 'web_url'
browser.get(url)
browser.find_element(By.ID, "txtUserName").send_keys(username) 
browser.find_element(By.ID, "txtPassword").send_keys(password)
time.sleep(5)
login_btn = browser.find_element(By.ID, "Button1")
result = login_btn.click()

note - @txtUserName  - username btn id 
@txtPassword  - password btn id 
@Button1   - login btn id 

ref - https://iq.opengenus.org/python-script-to-open-webpage-login/