python实现爬取百度图片的方法示例

import json
import itertools
import urllib
import requests
import os
import re
import sys
word=input("请输入关键字：")
path="./ok"
if not os.path.exists(path):
  os.mkdir(path)
word=urllib.parse.quote(word)
url = r"http://image.baidu.com/search/acjson"
urls=(url.format(word=word,pn=x)for x in itertools.count(start=0,step=60))
index=0
str_table = {
  '_z2C$q': ':',
  '_z&e3B': '.',
  'AzdH3F': '/'
}
char_table = {
  'w': 'a',
  'k': 'b',
  'v': 'c',
  '1': 'd',
  'j': 'e',
  'u': 'f',
  '2': 'g',
  'i': 'h',
  't': 'i',
  '3': 'j',
  'h': 'k',
  's': 'l',
  '4': 'm',
  'g': 'n',
  '5': 'o',
  'r': 'p',
  'q': 'q',
  '6': 'r',
  'f': 's',
  'p': 't',
  '7': 'u',
  'e': 'v',
  'o': 'w',
  '8': '1',
  'd': '2',
  'n': '3',
  '9': '4',
  'c': '5',
  'm': '6',
  '0': '7',
  'b': '8',
  'l': '9',
  'a': '0'
}
i=1
char_table = {ord(key): ord(value) for key, value in char_table.items()}
for url in urls:
  html=requests.get(url,timeout=10).text
  a=re.compile(r'"objURL":"(.*"')
  downURL=re.findall(a,html)
  for t in downURL:
    for key, value in str_table.items():
        t = t.replace(key, value)
    t=t.translate(char_table)
    try:
      html_1=requests.get(t)
      if str(html_1.status_code)[0]=="4":
        print('失败1')
        continue
    except Exception as e:
      print('失败2')
      continue
    with open(path+"/"+str(i)+".jpg",'wb') as f:
      f.write(html_1.content)
    i=i+1