吴裕雄 python 爬虫(4)】的更多相关文章

import requests user_agent = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64)AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36' headers = {'User-Agent':user_agent} r = requests.get("http://www.gov.cn/zhengce/content/2017-11/23/conten…
import hashlib md5 = hashlib.md5() md5.update(b'Test String') print(md5.hexdigest()) import hashlib md5 = hashlib.md5(b'Test String').hexdigest() print(md5) import os import hashlib import requests # url = "http://opendata.epa.gov.tw/ws/Data/REWXQA/?…
import requests from bs4 import BeautifulSoup url = 'http://www.baidu.com' html = requests.get(url) sp = BeautifulSoup(html.text, 'html.parser') print(sp) html_doc = """ <html><head><title>页标题</title></head> &l…
from urllib.parse import urlparse url = 'http://www.pm25x.com/city/beijing.htm' o = urlparse(url) print(o) print("scheme={}".format(o.scheme)) # http print("netloc={}".format(o.netloc)) # www.pm25x.com print("port={}".format(…
一.什么是爬虫 爬虫:一段自动抓取互联网信息的程序,从互联网上抓取对于我们有价值的信息. 二.Python爬虫架构 Python 爬虫架构主要由五个部分组成,分别是调度器.URL管理器.网页下载器.网页解析器.应用程序(爬取的有价值数据). 调度器:相当于一台电脑的CPU,主要负责调度URL管理器.下载器.解析器之间的协调工作. URL管理器:包括待爬取的URL地址和已爬取的URL地址,防止重复抓取URL和循环抓取URL,实现URL管理器主要用三种方式,通过内存.数据库.缓存数据库来实现. 网页…
python 3.x报错:No module named 'cookielib'或No module named 'urllib2' 1. ModuleNotFoundError: No module named 'cookielib' Python3中,import cookielib改成 import http.cookiejar,然后方法里cookielib也改成 http.cookiejar. 2. ModuleNotFoundError: No module named 'urllib…
import chardet import urllib.request page = urllib.request.urlopen('http://photo.sina.com.cn/') #打开网页 htmlCode = page.read() #获取网页源代码 print(chardet.detect(htmlCode)) #打印返回网页的编码方式 {'encoding': 'utf-8', 'confidence': 0.99, 'language': ''} data = htmlCo…
import tensorflow as tf from tensorflow.python.framework import graph_util v1 = tf.Variable(tf.constant(1.0, shape=[1]), name = "v1") v2 = tf.Variable(tf.constant(2.0, shape=[1]), name = "v2") result = v1 + v2 init_op = tf.global_varia…
# -*- coding: utf-8 -*- import glob import os.path import numpy as np import tensorflow as tf from tensorflow.python.platform import gfile import tensorflow.contrib.slim as slim import tensorflow.contrib.slim.python.slim.nets.inception_v3 as inceptio…
import glob import os.path import numpy as np import tensorflow as tf from tensorflow.python.platform import gfile import tensorflow.contrib.slim as slim # 因为slim.nets包在 tensorflow 1.3 中有一些问题,所以这里为了方便 # 我们将slim.nets.inception_v3中的代码拷贝到了同一个文件夹下. # imp…