模拟登录豆瓣（python爬虫）

短命女 2023-10-05 14:07 72阅读 0赞

### 模拟登录豆瓣 ###

使用selenium和time两个库，不考虑需要验证码的情况。  
**步骤如下：**  
1.首先进入豆瓣首页  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDc5NzUzOQ_size_16_color_FFFFFF_t_70_pic_center]  
2.模拟点击密码登录  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDc5NzUzOQ_size_16_color_FFFFFF_t_70_pic_center 1]  
3.模拟输入账号密码  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDc5NzUzOQ_size_16_color_FFFFFF_t_70_pic_center 2]  
4.模拟点击登录  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDc5NzUzOQ_size_16_color_FFFFFF_t_70_pic_center 3]

5.进入页面，运行结果为True。代表登录成功，账号信息在网页源代码中！  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDc5NzUzOQ_size_16_color_FFFFFF_t_70_pic_center 4]  
**代码如下：**  
其中使用css类选择器寻找元素（密码登录，账号输入框，密码输入框，登录豆瓣）

from selenium import webdriver
    import time
    # 缺少验证码的情况
    url = "https://www.douban.com" 
    web = webdriver.Chrome()
    web.implicitly_wait(3)   # 隐式等待3秒
    web.get(url)	# 链接到豆瓣首页
    iframe = web.find_element_by_tag_name('iframe')     # 主代码在iframe里面，要先切进去
    web.switch_to.frame(iframe)  # 切到内层
    web.find_element_by_css_selector('.account-tab-account').click()    # 模拟鼠标点击
    web.find_element_by_css_selector('#username').send_keys('你自己的账号')  # 模拟键盘输入
    web.find_element_by_css_selector('#password').send_keys('你自己的密码')
    web.find_element_by_css_selector('.btn-account').click()
    time.sleep(3)   # 要先等待，再获取源代码，否则获取的网页源代码是豆瓣首页
    html = web.page_source  # 获取源代码
    
    print("加辣椒了吗？" in html)		# 你自己的账号名称，如果结果为True，则登录成功！（记得改成自己账号哦！）
    
    web.quit()	# 关闭浏览器

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDc5NzUzOQ_size_16_color_FFFFFF_t_70_pic_center 5]  
如图，豆瓣的登录代码块是在iframe标签里面的，所以我们要先切到iframe里面！这一步很重要！！！  
iframe = web.find\_element\_by\_tag\_name(‘iframe’)

就这样，是不是很简单呢！解释一万句，不及代码20行！  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDc5NzUzOQ_size_16_color_FFFFFF_t_70_pic_center 6]

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