Python根据关键字百度搜索下载图片

#-*- coding:utf-8 -*-
import re
import requests
import os

g_download_dir = '/home/manjianchao/图片' #文件存放路径（根据自己需要存放，但是要确保文件是否有创建权限）
word = raw_input('Input the key value:') #需要搜索的关键字

#----------------------------------------------------------------------
def mdir():
if not os.path.exists(g_download_dir):
os.mkdir(g_download_dir)
if  not os.path.exists(g_download_dir+word):
os.mkdir(g_download_dir+word)

os.chdir(g_download_dir+word)

#----------------------------------------------------------------------
def geturl(page_number):
#通过关键字搜索相关的图片进行下载
#url = 'http://image.baidu.com/search/flip?tn=baiduimage&ie=utf-8&word='+word+'&ct=201326592&v=flip'
url = "http://image.baidu.com/search/avatarjson?tn=resultjsonavatarnew&ie=utf-8&word=" + word + "&cg=girl&rn=60&pn=" + str(page_number)
html = requests.get(url).text
pic_url = re.findall('"objURL":"(.*?)",',html,re.S)
return pic_url

#----------------------------------------------------------------------
def downimage(pic_url, page_number):
i = 1
for each in pic_url:
print each
try:
pic= requests.get(each, timeout=10)
except requests.exceptions.ConnectionError:
print '========Error! CAN NOT DOWMLOAD THIS PICTURE!!!========'
i -= 1
continue
except requests.exceptions.Timeout:
print "========REQUEST TIMEOUT !!!========"
i -= 1
string = word+ str(page_number) + '-' + str(i) + '.jpg'
fp = open(string,'wb')
fp.write(pic.content)
fp.close()
i += 1

#------------------------Start--------------------------------------
if __name__ == '__main__':
mdir()
page_number = 1
page_count = 60
while 1:
mPicUrl = geturl(page_count)
downimage(mPicUrl, page_number)
page_count += 60
page_number += 1