五分钟带你玩转python（一）python入门，爬取图片，文字，视频，音频

爬取天气 并存在数据库

      #!/usr/bin/python
      # -*- coding: utf-8 -*-
      import pymysql
      import requests
      from bs4 import BeautifulSoup
      db = pymysql.connect(
          host='localhost',
          port=3306,
          user='root',
          passwd='root',
          db='mysql',
          use_unicode=True,
          charset="utf8"
      )
      cursor = db.cursor()
      def downdata(url):
          hd = {
             'User-Agent': "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36"}
          req = requests.get(url, headers=hd)
         # req.encoding = 'utf-8'
          soup = BeautifulSoup(req.text, 'html.parser')
          da_new = soup.find_all('li', class_='ndays-item png-fix cf')
         for da in da_new:
              day = da.find('div', class_='td td2').find('p', class_='p1')
              week = da.find('div', class_='td td2').find('p', class_='p2')
              wd = da.find('div', class_='td td5').find('p', class_='p1')
              fl = da.find('div', class_='td td5').find('p', class_='p2')
              f2 = da.find('div', class_='td td3').find('div')['title']
              print('今天是' + day.text + ',' + '星期' + week.text + ',' + '温度' + wd.text + ',' + '风力' + fl.text + ',' + '天气' + f2)
              sql = "INSERT INTO tianiq(day1,week1, wd, fl, air) VALUES ('%s','%s','%s','%s','%s')" % (day.text, week.text, wd.text, fl.text, f2)
              print(sql)
              cursor.execute(sql)
              db.commit()
      downdata('http://tianqi.sogou.com/shenyang/15/')
  
 

爬取漫画

      #!/usr/bin/python
      # -*- coding: UTF-8 -*-
      import re
      import urllib.request
      def gethtml(url):
          headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:23.0) Gecko/20100101 Firefox/23.0'}
          req = urllib.request.Request(url=url, headers=headers)
          html = urllib.request.urlopen(req).read()
         return html
      def getimg(html):
          reg = r'src="(.*?\.jpg)"'
          img=re.compile(reg)
          html=html.decode('utf-8')#python3
          imglist=re.findall(img,html)
          x = 0
         for imgurl in imglist:
              urllib.request.urlretrieve(imgurl,'D:%s.jpg'%x)
              x = x+1
      html=gethtml("http://www.tuku.cc/")
      print(getimg(html))
  
 

调用数据库

      #!/usr/bin/python
      # -*- coding: UTF-8 -*-
      import pymysql
      # 打开数据库连接
      db = pymysql.connect("localhost", "root", "root", "mysql")
      # 使用cursor()方法获取操作游标
      cursor = db.cursor()
      # SQL 插入语句
      sql = "INSERT INTO tianiq(day1, \
      week1, wd, fl, air) \
       VALUES ('Mac', 'Mohan', 'M', 'M', 'M')"
      try:
         # 执行sql语句
          cursor.execute(sql)
         # 执行sql语句
          db.commit()
          print("insert ok")
      except:
         # 发生错误时回滚
          db.rollback()
      # 关闭数据库连接
      db.close()
  
 

爬取视频

      #!/usr/bin/python
      # -*- coding: UTF-8 -*-
      import re
      import requests
      from bs4 import BeautifulSoup
      def download(url):
         dz = {'User-Agent':'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36'}
         req = requests.get(url,headers = dz).content
         with open('qq.mp4', 'wb') as fp:
             fp.write(req)
      download('http://video.study.163.com/edu-video/nos/mp4/2017/04/01/1006064693_cc2842f7dc8b410c96018ec618f37ef6_sd.mp4?ak=d2e3a054a6a144f3d98805f49b4f04439064ce920ba6837d89a32d0b0294ad3c1729b01fa6a0b5a3442ba46f5001b48b1ee2fb6240fc719e1b3940ed872a11f180acad2d0d7744336d03591c3586614af455d97e99102a49b825836de913910ef0837682774232610f0d4e39d8436cb9a153bdeea4a2bfbae357803dfb6768a742fe395e87eba0c3e30b7b64ef1be06585111bf60ea26d5dad1f891edd9e94a8e167e0b04144490499ffe31e0d97a0a1babcbd7d2e007d850cc3bf7aa697e8ff')
  
 

爬取音频

      #!/usr/bin/python
      # -*- coding: UTF-8 -*-
      import json
      import requests
      from bs4 import BeautifulSoup
      def download(url):
          hd = {
             'User-Agent': "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36"}
          req = requests.get(url, headers=hd)
          reps = req.text
          result = json.loads(reps)
          datap = result['data']['tracksAudioPlay']
         for index in datap:
              title = index['trackName']
              index['src']
              print(index['src'])
              data = requests.get(index['src'], headers=hd).content
             try:
                 with open('%s.mp3' % title, 'wb') as f:
                      f.write(data)
             except BaseException:
                  print('1')
      download('http://www.ximalaya.com/revision/play/album?albumId=7371372&pageNum=1&sort=-1&pageSize=30')
  
 

爬取文字

      #!/usr/bin/python
      # -*- coding: UTF-8 -*-
      import requests
      from bs4 import BeautifulSoup
      def get_h(url):
          response = requests.get(url)
          response .encoding = 'utf-8'
         return response.text
      def get_c(html):
          soup = BeautifulSoup(html,'html.parser')
          joke_content = soup.select('div.content')[0].getText
         return joke_content
      url_joke = "https://www.qiushibaike.com"
      html = get_h(url_joke)
      joke_content = get_c(html)
      print(joke_content)
  
 

爬取图片

      #!/usr/bin/python
      # -*- coding: UTF-8 -*-
      import requests
      from bs4 import BeautifulSoup
      import os
      headers = {
         'User-Agent': "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/22.0.1207.1 Safari/537.1"}
      url = 'http://www.ivsky.com/'
      start_html = requests.get(url, headers=headers)
      Soup = BeautifulSoup(start_html.text, 'html.parser')
      all_div = Soup.find_all('div', class_='syl_pic')
      for lsd in all_div:
          lsds = 'http://www.ivsky.com' + lsd.find('a')['href']
          title = lsd.find('a').get_text
         print(lsds)
          html = requests.get(lsds, headers=headers)
          Soup_new = BeautifulSoup(html.text, 'html.parser')
          app = Soup_new.find_all('div', class_='il_img')
         for app_new in app:
              apptwo = 'http://www.ivsky.com' + app_new.find('a')['href']
              htmlthree = requests.get(apptwo, headers=headers)
              Soupthree = BeautifulSoup(htmlthree.text, 'html.parser')
              appthree = Soupthree.find('div', class_='pic')
              appf = appthree.find('img')['src']
              name = appf[-9:-4]
              img = requests.get(appf, headers=headers)
              f = open(name + '.jpg', 'ab')  ##写入多媒体文件必须要 b 这个参数！！必须要！！
              f.write(img.content)  ##多媒体文件要是用conctent哦！
              f.close()
  
 

爬取小说

      #!/usr/bin/python
      # -*- coding: UTF-8 -*-
      from urllib import request
      from bs4 import BeautifulSoup
      import re
      import sys
      if __name__ == "__main__":
         #创建txt文件
          file = open('一念永恒.txt', 'w', encoding='utf-8')
         #一念永恒小说目录地址
          target_url = 'http://www.biqukan.com/1_1094/'
         #User-Agent
          head = {}
          head['User-Agent'] = 'Mozilla/5.0 (Linux; Android 4.1.1; Nexus 7 Build/JRO03D) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.166 Safari/535.19'
          target_req = request.Request(url = target_url, headers = head)
          target_response = request.urlopen(target_req)
          target_html = target_response.read().decode('gbk','ignore')
         #创建BeautifulSoup对象
          listmain_soup = BeautifulSoup(target_html,'html.parser')
         #搜索文档树,找出div标签中class为listmain的所有子标签
          chapters = listmain_soup.find_all('div',class_ = 'listmain')
         #使用查询结果再创建一个BeautifulSoup对象,对其继续进行解析
          download_soup = BeautifulSoup(str(chapters), 'html.parser')
         #计算章节个数
          numbers = (len(download_soup.dl.contents) - 1) / 2 - 8
          index = 1
         #开始记录内容标志位,只要正文卷下面的链接,最新章节列表链接剔除
          begin_flag = False
         #遍历dl标签下所有子节点
         for child in download_soup.dl.children:
             #滤除回车
             if child != '\n':
                 #找到《一念永恒》正文卷,使能标志位
                 if child.string == u"《一念永恒》正文卷":
                      begin_flag = True
                 #爬取链接并下载链接内容
                 if begin_flag == True and child.a != None:
                      download_url = "http://www.biqukan.com" + child.a.get('href')
                      download_req = request.Request(url = download_url, headers = head)
                      download_response = request.urlopen(download_req)
                      download_html = download_response.read().decode('gbk','ignore')
                      download_name = child.string
                      soup_texts = BeautifulSoup(download_html, 'html.parser')
                      texts = soup_texts.find_all(id = 'content', class_ = 'showtxt')
                      soup_text = BeautifulSoup(str(texts), 'html.parser')
                      write_flag = True
                      file.write(download_name + '\n\n')
                     #将爬取内容写入文件
                     for each in soup_text.div.text.replace('\xa0',''):
                         if each == 'h':
                              write_flag = False
                         if write_flag == True and each != ' ':
                              file.write(each)
                         if write_flag == True and each == '\r':
                              file.write('\n')
                      file.write('\n\n')
                     #打印爬取进度
                      sys.stdout.write("已下载:%.3f%%" % float(index/numbers) + '\r')
                      sys.stdout.flush()
                      index += 1
          file.close()
  
 

文章来源: baocl.blog.csdn.net，作者：小黄鸡1992，版权归原作者所有，如需转载，请联系作者。

原文链接：baocl.blog.csdn.net/article/details/95478249