19. selenium- 元素定位By.CLASS_NAME

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import time
from selenium import webdriver
from selenium.webdriver.common.by import By

driver = webdriver.Chrome()
driver.get('https://www.bilibili.com')
time.sleep(3)
# 只获取class属性的第一个元素
driver.find_element(By.CLASS_NAME,'nav-search-input').send_keys('rdma')
time.sleep(3)
# 获取class属性的所有元素
driver.find_element(By.CLASS_NAME,'nav-search-btn').click()
time.sleep(3)

当CLASS_NAME不唯一时

image.png
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import time
from selenium import webdriver
from selenium.webdriver.common.by import By

driver = webdriver.Chrome()
driver.get('https://www.bilibili.com')
time.sleep(3)
# 只获取class属性的第一个元素
# driver.find_element(By.CLASS_NAME,'nav-search-input').send_keys('rdma')
# time.sleep(3)
# 获取class属性的所有元素
# driver.find_element(By.CLASS_NAME,'nav-search-btn').click()
driver.find_elements(By.CLASS_NAME,'channel-link')[0].click()
time.sleep(10)

.find_elements返回列表，可迭代对象

import time
from selenium import webdriver
from selenium.webdriver.common.by import By

driver = webdriver.Chrome()
driver.get('https://www.bilibili.com')
time.sleep(3)
# 只获取class属性的第一个元素
# driver.find_element(By.CLASS_NAME,'nav-search-input').send_keys('rdma')
# time.sleep(3)
# 获取class属性的所有元素
# driver.find_element(By.CLASS_NAME,'nav-search-btn').click()
# driver.find_elements(By.CLASS_NAME,'channel-link')[0].click()
# time.sleep(3)
# 注意，只有.find_elements返回列表，可迭代对象。.find_element 返回单个元素，不可迭代
for ele in driver.find_elements(By.CLASS_NAME,'channel-link'):
    print(ele.text)

当class中间有空格时，只能选取一个作为参数传递

driver.get('https://www.baidu.com/')
time.sleep(3)
driver.find_element(By.CLASS_NAME,'c-font-normal')
time.sleep(3)