import urllib.request as ur

import urllib.parse as up

import re

url='http://www.heibanke.com/lesson/crawler_ex01/'

pat=re.compile(r'<h3>(.+)</h3>')

i=1

while i<=30:

    values={'username':'fang','password':i}

    #这里需要注意最后要utf8编码

    data=up.urlencode(values).encode('utf-8')

    req=ur.Request(url,data)

    res=ur.urlopen(req).read().decode('utf-8')

    html=pat.findall(res)

    if '错误' in html[0]:

    	print('password:',i,html[0])

    	i+=1

    else:

    	print('password:',i,html[0])

    	break