python3爬虫-python3.7简单的爬虫实例详解

python3.7简单的爬虫,具体代码如下所示:

#https://www.runoob.com/w3cnote/python-spider-intro.html

#Python 爬虫介绍

import urllib.parse

import urllib.request

from http import cookiejar

url = "http://www.baidu.com"

response1 = urllib.request.urlopen(url)

print("第一种方法")

#获取状态码,200表示成功

print(response1.getcode())

#获取网页内容的长度

print(str(response1.read()))

print(len(response1.read()))

print("第二种方法")

request = urllib.request.Request(url)

#模拟Mozilla浏览器进行爬虫

request.add_header("user-agent","Mozilla/5.0")

response2 = urllib.request.urlopen(request)

print(response2.getcode())

print(len(response2.read()))

print("第三种方法")

cookie = cookiejar.CookieJar()

#加入urllib2处理cookie的能力#

opener = urllib.request.build_opener(urllib.request.HTTPCookieProcessor(cookie))

urllib.request.install_opener(opener)

response3 = urllib.request.urlopen(url)

print(response3.getcode())

print(len(response3.read()))

print(cookie)

code: https://github.com/pascal19821003/python

path: python/study/tutorial/pachong/1.py

总结

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