URL提交是百度提供的一个站长工具，用于给站长提供手工收录某些URL的接口，但是该接口有验证码识别部分，比较难弄。所以编写了如下程序进行验证码自动识别：

主要思路

获取多个验证码，提交到 http://lab.ocrking.com/ 进行多次识别，然后计算每个验证码图片识别出来的 字母或数字 进行统计，得出统计率最高的 即为验证码。

复制代码 代码如下:

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import requests
import time
import json
import re
 
 
if __name__ == "__main__":
    i = 1
    s = requests.session()
    s.headers.update({'Referer':'http://zhanzhang.baidu.com/sitesubmit/index','User-Agent':'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.154 Safari/537.36'})
    r = s.get('http://zhanzhang.baidu.com/sitesubmit/index')
    s2 = requests.session()
    r = s.post('http://zhanzhang.baidu.com/captcha',data={'async':'false','n':time.time()})
    url = json.loads(r.content)['url']
    temp = []
    while 1:
        try:
            r = s.get(url)
            img_data = r.content
            r = s2.get('http://lab.ocrking.com/')
            try:
                content = ' '.join(r.content.split())
                sid =  re.findall(r'"sid" : "(.+"',content)[0]
                hash_1 = re.findall(r'"hash" : "(.+"',content)[0]
                timestamp = re.findall(r'"timestamp" : "(.+"',content)[0]
            except:
                print 'error on get orking info!'
                continue
            files = {'Filedata':('icode.jpeg', img_data)}
            data  = {'Filename':'icode.jpeg','sid':sid,'hash':hash_1,'timestamp':timestamp}
            r = s2.post('http://lab.ocrking.com/upload.html',files = files,data= data)
            r = s2.post('http://lab.ocrking.com/ocrking.html',data={'upfile':r.content,'type':'captcha','charset':'7'})
            icode = re.findall(r'<OcrResult>(.+?)</OcrResult>',r.content)[0]
            if len(icode) != 4 :
                continue
            temp.append(icode)
            i = i + 1
            if i == 3 :
                break
        except Exception,e:
            print e
            pass
 
    a = {'0':{},'1':{},'2':{},'3':{}}
    for aa in temp:
        i = 0
        while i <=3 :
            try:
                a[str(i)][aa[i]] =  a[str(i)][aa[i]] + 1
            except:
                a[str(i)][aa[i]] = 1
            i = i + 1
    icode = ['','','','']
    for index in a:
        temp_times = 0
        for index_1 in a[index]:
            if a[index][index_1] >= temp_times :
                temp_times = a[index][index_1]
                icode[int(index)] = index_1
 
    icode =  ''.join(icode)
 
    img_name = 'temp\\'+icode+'.png'
    file_object = open(img_name, 'w')
    file_object.write(img_data)
    file_object.close()
 
 
 
    #r = s.post('http://zhanzhang.baidu.com/sitesubmit/sitepost',data={'url':'http://lab.ocrking.com/','captcha':icode})
 
    #print r.content