python 爬虫一键爬取 淘宝天猫宝贝页面主图颜色图和详情图的教程

实例如下所示：

import requests
import re,sys,os
import json
import threading
import pprint
class spider:
 def __init__(self,sid,name):
 
 self.id = sid
 self.headers = { "Accept":"text/html,application/xhtml+xml,application/xml;",
  "Accept-Encoding":"gzip",
  "Accept-Language":"zh-CN,zh;q=0.8",
  "Referer":"http://www.example.com/",
  "User-Agent":"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.90 Safari/537.36"
  }
 
 self.name=name
 def openurl(self,url):
 
 self.request = requests.get(url,headers = self.headers) 
 if self.request.ok:
  return self.request.text
  
 def matchs(self):
 
 tmall_exp = r"Setup\(([\s\S]+?)\);"### 匹配商品数据的正则
 detail= r"src=\"(https://img\S+?[jpgifn]+?)\"" ###匹配 商品详情图的正则
 html = self.openurl("https://detail.tmall.com/item.htm?id=%s"%self.id)
 data = re.findall(tmall_exp,html)
 data = json.loads(data[0])
 main_img = data['propertyPics'] ## 这里包括了主图和颜色图的地址
 color_data =data['valItemInfo'] ['skuList'] ### 这里获得商品的颜色信息列表 包括颜色编码 颜色名称,商品skuID
 detail_html = self.openurl("http:"+data['api']["httpsDescUrl"])
 detail_image = re.findall(detail,detail_html)
 self.newdata={"MAIN":main_img['default'],"DETAIL":detail_image,"id":self.id,}
 
 psvs = []
 self.newdata['COLOR']=[]
 
 for v in range(len(color_data)):
  if ";"in color_data[v]["pvs"]:
  psv = color_data[v]['pvs'][color_data[v]['pvs'].find(";")+1:]
  else:
  psv = color_data[v]['pvs']
  if psv in psvs:
  
  continue
  psvs.append(psv)
 
  self.newdata['COLOR'].append({color_data[v]["names"]:main_img[";"+psv+";"]})
  
 pprint.pprint(self.newdata)
 
 return self.newdata
 
 def download(self):
 if len(self.newdata)>0:
  for x in range(len(self.newdata['MAIN'])):
  
  threading.Thread(target=self.download_main,args=(self.newdata['MAIN'][x],x)).start()
  
  for x in self.newdata['COLOR']:
  
  threading.Thread(target=self.download_color,args=(x,)).start()
  for x in range(len(self.newdata['DETAIL'])):
  
  threading.Thread(target=self.download_detail,args=(self.newdata['DETAIL'][x],x)).start()
 return
 def download_main(self,url,index):
 try:
  img = requests.get("http:"+url,stream=True,headers = self.headers,timeout=10)
 except:
  print(sys.exc_info())
  return
 if img.ok:
  if not os.path.exists(self.name+"/main"):
  try:
   os.makedirs(self.name+"/main")
  except:
   pass
  imgs = open(self.name+"/main/%s.jpg"%index,"wb")
  imgs.write(img.content)
  imgs.close()
  
 def download_color(self,url):
  
 try:
  img = requests.get("http:"+url[list(url.keys())[0]][0],stream=True,headers = self.headers,timeout=10)
 except:
  print(sys.exc_info())
  return
 if img.ok:
  if not os.path.exists(self.name+"/color"):
  try:
   os.makedirs(self.name+"/color")
  except:
   pass
  if "/"in list(url.keys())[0]:
  color = list(url.keys())[0].replace("/","_")
  elif "\\" in list(url.keys())[0]:
  color = list(url.keys())[0].replace("\\","_")
  else:
  color = list(url.keys())[0]
  imgs = open(self.name+"/color/%s.jpg"%color,"wb")
  imgs.write(img.content)
  imgs.close()
 def download_detail(self,url,index):
 try:
  img = requests.get(url,stream=True,headers = self.headers,timeout=10)
 except:
  print(sys.exc_info())
  return
 if img.ok:
  if not os.path.exists(self.name+"/detail"):
  try:
   os.makedirs(self.name+"/detail")
  except:
   pass
  
  imgs = open(self.name+"/detail/%s.jpg"%index,"wb")
  imgs.write(img.content)
  imgs.close()
  
if __name__ =="__main__":
 
 sid = 528766269341 ## 这里输入天猫宝贝ID
 taobao = spider(sid,"下载图片/T")
 taobao.matchs()
 taobao.download()