python爬虫 基于requests模块的get请求实现详解


						需求：爬取搜狗首页的页面数据





import requests

# 1.指定url

url = 'http://www.sogou.com/'

# 2.发起get请求:get方法会返回请求成功的响应对象

response = requests.get(url=url)

# 3.获取响应中的数据：text属性作用是可以获取响应对象中字符串形式的页面数据

page_data = response.text

# 4.持久化数据

with open("sougou.html","w",encoding="utf-8") as f:

  f.write(page_data)

  f.close()

print("ok")



requests模块如何处理携带参数的get请求，返回携带参数的请求



需求:指定一个词条，获取搜狗搜索结果所对应的页面数据

之前urllib模块处理url上参数有中文的需要处理编码，requests会自动处理url编码

发起带参数的get请求



params可以是传字典或者列表





def get(url, params=None, **kwargs):

  r"""Sends a GET request.

  :param url: URL for the new :class:`Request` object.

  :param params: (optional) Dictionary, list of tuples or bytes to send

    in the body of the :class:`Request`.

  :param \*\*kwargs: Optional arguments that ``request`` takes.

  :return: :class:`Response <Response>` object

  :rtype: requests.Response







import requests

# 指定url

url = 'http://www.sogou.com/web'

# 封装get请求参数

prams = {

  'query':'周杰伦',

  'ie':'utf-8'

}

response = requests.get(url=url,params=prams)

page_text = response.text

with open("周杰伦.html","w",encoding="utf-8") as f:

  f.write(page_text)

  f.close()

print("ok")



利用requests模块自定义请求头信息，并且发起带参数的get请求



get方法有个headers参数 把请求头信息的字典赋给headers参数





import requests

# 指定url

url = 'http://www.sogou.com/web'

# 封装get请求参数

prams = {

  'query':'周杰伦',

  'ie':'utf-8'

}

# 自定义请求头信息

headers={

  'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36',

  }

response = requests.get(url=url,params=prams,headers=headers)

page_text = response.text

with open("周杰伦.html","w",encoding="utf-8") as f:

  f.write(page_text)

  f.close()

print("ok")



以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持中文源码网。