selenium python 入门教程

1、打开浏览器

from selenium import webdriver
driver = webdriver.Chrome()
driver.get('http://www.baidu.com')
driver.close()

2、使用title_contains判断访问页面是否正确，即判断title

from selenium.webdriver.support import expected_conditions as EC
title = EC.title_contains('百度')
print(EC.title_contains('百度'))

3、八种元素定位

driver.find_element_by_class_name
driver.find_element_by_css_selector     // css选择器 
driver.find_element_by_id
driver.find_element_by_name
driver.find_element_by_link_text   // 链接文字
driver.find_element_by_partial_link_text   // 部分链接文字
driver.find_element_by_tag_name   // 标签
driver.find_element_by_xpath  
*如果是多个元素使用driver.find_elements.xxx即可
*嵌套定位：driver.find_element_by_id('xx').find_element_by_id('xx')

4、元素操作

input赋值：driver.find_element_by_id('xxx').send_keys('helloworld')
元素点击：driver.find_element_by_id('xxx').click()

5、判断元素是否可见

presence_of_element_located 判断元素是否存在，隐藏也算存在visibility_of_element_located    判断元素是否可见
visibility_of_all_elements_located    判断至少有一个即true
visibility_of_any_elements_located    判断全部都是才为true
WebDriverWait是智能等待，保证元素都加载完成

from selenium import webdriver
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.support.wait import WebDriverWait
from selenium.webdriver.common.by import By

driver = webdriver.Chrome()
locator = (By.CLASS_NAME,"controls")
WebDriverWait(driver,1).until(EC.visibility_of_element_located(locator))
driver.close()