pythonchallenge level 4

来源：互联网发布：逆战雷蛇宏数据设置编辑：程序博客网时间：2024/05/16 15:05

链接：http://www.pythonchallenge.com/pc/def/linkedlist.html

这题主要学习urllib和re模块

import reimport urlliburlpre = 'http://www.pythonchallenge.com/pc/def/linkedlist.php?nothing='nothing = '12345'f = open('4.txt', 'w')for i in range(400):    response = urllib.urlopen(urlpre + nothing)    page = response.read()    response.close()    nothing = re.search(r'\d+',page)    if nothing != None:        nothing = nothing.group(0)    else:        nothing = page        print nothing

运行的很慢，最后得到：

所以第五题的答案应该是http://www.pythonchallenge.com/pc/def/peak.html

第四题给出的官方答案地址http://wiki.pythonchallenge.com/index.php?title=Level4:Main_Page

一个比较简单的版本：

#!/usr/bin/env pythonimport reimport urlliburl="http://www.pythonchallenge.com/pc/def/linkedlist.php?nothing="nothing = "12345"search = re.compile(" (\d*)$")search_html = re.compile("\.html$")for i in xrange(300):     print "%s: " % nothing,    line = urllib.urlopen( "%s%s" % (url,nothing) ).read()    print line    # handle the solution (last) line    if search_html.findall (line):        break            match = search.findall (line)    if match:        # next nothing        nothing = match [0]    else:        # handle the divide by two line        nothing = str (int (nothing) / 2 )

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