爬取12306验证码图片

# -*- coding:utf-8 -*-import timeimport urllib2import ssl def get_code_picture(local_filename):    #目的为了通过未认证的12306证书    ssl._create_default_https_context = ssl._create_unverified_context    req = urllib2.Request("https://kyfw.12306.cn/passport/captcha/captcha-image?login_site=E&module=login&rand=sjrand&0.6551712691897946")    req.add_header("Referer","https://kyfw.12306.cn/otn/login/init")    req.add_header("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36")    codeimg = urllib2.urlopen(req).read()            with open(local_filename, 'wb') as f:        f.write(codeimg)if __name__ == "__main__":    for i in xrange(0x7fffffff):        path = './123062/' + str(i+1) +'.jpg'        get_code_picture(path)        print path                #由于12306过快刷新会提示稍后再来，所以再此休眠一秒。        time.sleep(1)