python 爬取百度图片_python爬取百度图库图片

import json

import itertools

import urllib

import requests

import os

import re

import sys

print("hah")

#############################################################

word="干电池" #图片搜索的关键字，目前仅支持单个关键词

imageNum =2000; #下载图片的数目

saveImagePath="C:/Users/chenxiaowei/Desktop/datasetClean2/gandianci/" #保存图片的途径

indexOffset=1 #图像命名起始点

#############################################################

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'

}

# str 的translate方法需要用单个字符的十进制unicode编码作为key

# value 中的数字会被当成十进制unicode编码转换成字符

# 也可以直接用字符串作为value

char_table = {ord(key): ord(value) for key, value in char_table.items()}

# 解码图片URL

def decode(url):

# 先替换字符串

for key, value in str_table.items():

url = url.replace(key, value)

# 再替换剩下的字符

return url.translate(char_table)

# 生成网址列表

def buildUrls(word):

word = urllib.parse.quote(word)

url = r"http://image.baidu.com/search/acjson?tn=resultjson_com&ipn=rj&ct=201326592&fp=result&queryWord={word}&cl=2&lm=-1&ie=utf-8&oe=utf-8&st=-1&ic=0&word={word}&face=0&istype=2nc=1&pn={pn}&rn=60"

urls = (url.format(word=word, pn=x) for x in itertools.count(start=0, step=60))

return urls

# 解析JSON获取图片URL

re_url = re.compile(r'"objURL":"(.*?)"')

def resolveImgUrl(html):

imgUrls = [decode(x) for x in re_url.findall(html)]

return imgUrls

def downImg(imgUrl, dirpath, imgName):

filename = os.path.join(dirpath, imgName)

try:

res = requests.get(imgUrl, timeout=15)

if str(res.status_code)[0] == "4":

print(str(res.status_code), ":" , imgUrl)

return False

except Exception as e:

print("抛出异常：", imgUrl)

print(e)

return False

with open(filename, "wb") as f:

f.write(res.content)

return True

def mkDir(dirName):

dirpath = os.path.join(sys.path[0], dirName)

if not os.path.exists(dirpath):

os.mkdir(dirpath)

return dirpath

if __name__ == '__main__':

print("=" * 50)

# word = input("请输入你要下载的图片关键词：\n")

dirpath = mkDir(saveImagePath)

urls = buildUrls(word)

index = 0

for url in urls:

print("正在请求：", url)

html = requests.get(url, timeout=10).content.decode('utf-8')

imgUrls = resolveImgUrl(html)

if len(imgUrls) == 0: # 没有图片则结束

break

for url in imgUrls:

if downImg(url, dirpath, str(index+indexOffset) + ".jpg"):

index += 1

print("正在下载第 %s 张" % (index+indexOffset))

if index==imageNum:

break

if index==imageNum:

print("---------------------下载完成----------------------")

print("下载结果保存在脚本目录下的文件夹中，文件名字：" + saveImagePath)

break