python测试工具开发面试宝典3web抓取

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用requests输出网站返回头

输出
'https://china-testing.github.io/'
的返回头

  • 参考答案
In [1]: import requests

In [2]: url = 'https://china-testing.github.io/'

In [3]: response = requests.get(url)

In [4]: response.request.headers
Out[4]: {'User-Agent': 'python-requests/2.18.4', 'Accept-Encoding': 'gzip, deflate', 'Accept': '*/*', 'Connection': 'keep-alive'}

requests是HTTP访问极其重要的库,比较常用的属性有:response.status_code、response.text。

更多参考资料:python工具库介绍-requests:人性化的HTTP

  • 常见面试题:

1,python有哪些常用的访问HTTP的库?

2,requests如果传送文件?

用Requests和BeautifulSoup爬取博客标题

爬取
https://china-testing.github.io/
首页的博客标题,共10条.

  • 参考答案
# -*- coding: utf-8 -*-
# 讨论钉钉免费群21745728 qq群144081101 567351477
# CreateDate: 2018-10-16

import requests
from bs4 import BeautifulSoup

def get_upcoming_events(url):
   req = requests.get(url)
   soup = BeautifulSoup(req.text, 'lxml')
   events = soup.findAll('article')

   for event in events:
       event_details = {}
       event_details['name'] = event.find('h1').find("a").text
       print(event_details)

get_upcoming_events('https://china-testing.github.io/')

执行结果:


$ python3 blogs.py
{'name': '接口自动化性能测试线上培训大纲'}
{'name': '2018最佳人工智能图像处理工具OpenCV书籍下载'}
{'name': 'IBM开发社区python精品文章汇总'}
{'name': 'python工具库介绍-requests:人性化的HTTP'}
{'name': '中草药的故事-金银花(标准中药)- 清热解毒,疏散风热'}
{'name': '中草药的故事-合欢花(标准中药)'}
{'name': '中草药的故事-吴茱萸(标准中药)'}
{'name': '[雪峰磁针石博客]python3快速入门教程9重要的标准库-高级篇'}
{'name': '[雪峰磁针石博客]python3快速入门教程11命令行自动化工具与pexpect'}
{'name': '[雪峰磁针石博客]python3快速入门教程9重要的标准库-基础篇'}

BeautifulSoup的默认解析器为html.parser,处理大页面比较吃力,为此使用lxml。解释器html5lib的行为和浏览器表现类似。

最新代码地址

https://github.com/china-testing/python-api-tesing/blob/master/python-automation-cook/ch3/blogs.py

  • 常见面试题:

1,BeautifulSoup有哪些解释器?

selenium访问'https://httpbin.org/forms/post'

用selenium访问'https://httpbin.org/forms/post',填充内容

图片.png
  • 参考答案
# 讨论钉钉免费群21745728 qq群144081101 567351477
# CreateDate: 2018-10-16

from selenium import webdriver
import time

browser = webdriver.Chrome()
browser.get('https://httpbin.org/forms/post')
custname = browser.find_element_by_name("custname")
custname.clear()
custname.send_keys("python测试开发")

time.sleep(2)
for size_element in browser.find_elements_by_name("size"):  
   if size_element.get_attribute('value') == 'medium':
       size_element.click()
  
time.sleep(2)        
for topping in browser.find_elements_by_name('topping'):
   if topping.get_attribute('value') in ['bacon', 'cheese']:
       topping.click()
   
time.sleep(2)           
browser.find_element_by_tag_name('form').submit()

执行结果

{
  "args": {}, 
  "data": "", 
  "files": {}, 
  "form": {
    "comments": "", 
    "custemail": "", 
    "custname": "python\u6d4b\u8bd5\u5f00\u53d1", 
    "custtel": "", 
    "delivery": "", 
    "size": "medium", 
    "topping": [
      "bacon", 
      "cheese"
    ]
  }, 
  "headers": {
    "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8", 
    "Accept-Encoding": "gzip, deflate, br", 
    "Accept-Language": "zh-CN,zh;q=0.9", 
    "Cache-Control": "max-age=0", 
    "Connection": "close", 
    "Content-Length": "132", 
    "Content-Type": "application/x-www-form-urlencoded", 
    "Host": "httpbin.org", 
    "Origin": "https://httpbin.org", 
    "Referer": "https://httpbin.org/forms/post", 
    "Upgrade-Insecure-Requests": "1", 
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36"
  }, 
  "json": null, 
  "origin": "183.62.236.90", 
  "url": "https://httpbin.org/post"
}
  • 其他常见selenium面试题:

1,selenium定位元素的元素的方法有哪些?

2,selenium如何处理AJAX?