2022-10-23课堂代码

```
'''
find_element_by(查找单个元素的)->高版本: find_element
find_elements_by(查找多个元素的)->高版本: find_elements

find_element(By.TAG_NAME,'tag01')
find_element_by_tag_name('tag01') -> find_element_by_css_selector('tag01')

find_element(By.CLASS_NAME,'class01')
find_element_by_class_name('class01') -> find_element_by_css_selector('.class01')

find_element(By.ID,'id01')
find_element_by_id('id01')  -> find_element_by_css_selector('#id01')

find_element(By.NAME,'name01')
find_element_by_name('name01') -> find_element_by_css_selector('[name="name01"]')
                                  find_element_by_css_selector('[id="id01"]')
                                  find_element_by_css_selector('[class="class01"]')

find_element(By.LINK_TEXT,'新闻')
find_element_by_link_text('新闻')  # 全部文本

find_element(By.PARTIAL_LINK_TEXT,'新')
find_element_by_partial_link_text('新') # 部分文件

页面有两个class01的元素, 使用find_element_by得到的结果是两个中的第一个

value=find_element(By.NAME,'name01').get_attribute('class')
'''

'''
<form>
    用户名
    密码
    验证码
    等等等
    <input type="submit" />
</form>
'''

```

百度搜索设置

```
'''
百度搜索设置

1. 使用webdriver打开百度页面
2. 鼠标滑动到设置上, 选择搜索设置

3. 将每页显示条数设置为"每页20条"
4. 点击保存设置, 并确认警告框

'''
import time

from selenium import webdriver
# from selenium.webdriver import ActionChains
from selenium.webdriver import ActionChains
from selenium.webdriver.common.by import By

driver = webdriver.Edge(executable_path="msedgedriver.exe")
driver.get('https://www.baidu.com')

time.sleep(2)  # 等待页面加载完成

'''
鼠标滑动到某个元素上
move_to_element
'''

# 鼠标悬停在设置按钮
settings_button = driver.find_element_by_id('s-usersetting-top')
ActionChains(driver).move_to_element(settings_button).perform()
# 点击搜索设置链接
search_setting_link = driver.find_element_by_link_text('搜索设置')
search_setting_link.click()

submit_btn = driver.find_element_by_css_selector('#id01 .prefpanelgo.setting-btn.c-btn.c-btn-primary[name="xxx"]')
submit_btn.click()

'''
<div class="prefpanelgo setting-btn c-btn c-btn-primary"></div>
<div id="id01">
    <div class="prefpanelgo setting-btn c-btn c-btn-primary"></div>
</div>
'''

#     #se-setting-3 .setting-radio-label
# > 相邻的层级 .item-setting>.setting-radio-label>.c01  (父亲>儿子)
# 空格 不相邻的层级  .item-setting .setting-radio-label  (曾祖父 孙子)
# 同一层多个class  .setting-radio-label.setting-gap-right-xlarge

time.sleep(2)

# html元素, 窗口化的元素

# JS(javascript)警告框确认
driver.switch_to.alert.accept()

```

Python课程-w73班

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