python统计日志ip访问数的方法

本文实例讲述了python统计日志ip访问数的方法。分享给大家供大家参考。具体如下：

    import re
    f=open("/tmp/a.log","r")
    arr={} 
    lines = f.readlines()
    for line in lines: 
      ipaddress=re.compile(r'^#(((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?))')
      match=ipaddress.match(line)
      if match: 
        ip = match.group(1) 
        if(arr.has_key(ip)): 
          arr[ip]+=1 
        else: 
          arr.setdefault(ip,1) 
    f.close() 
    for key in arr: 
      print key+"->"+str(arr[key])

日志格式为：

    #111.172.249.84 - - [12/Dec/2011:05:33:36 +0800] "GET /images/i/goTop.png HTTP/1.0" 200 486 "http://wh.xxxx.com/" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)" 
    #111.172.249.84 - - [12/Dec/2011:05:33:36 +0800] "GET /images/i/goTop.png HTTP/1.0" 200 486 "http://wh.xxxx.com/" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)" 
    #111.172.249.85 - - [12/Dec/2011:05:33:36 +0800] "GET /images/i/goTop.png HTTP/1.0" 200 486 "http://wh.xxxx.com/" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)" 
    #111.172.249.86 - - [12/Dec/2011:05:33:36 +0800] "GET /images/i/goTop.png HTTP/1.0" 200 486 "http://wh.xxxx.com/" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)" 

输出结果：

    111.172.249.86->1
    111.172.249.84->2
    111.172.249.85->1

注释：python字段的setdefault用法为获取信息，如果获取不到的时候就按照他的参数设置该值

    >>> a={} 
    >>> a['key']='123' 
    >>> print (a) 
    {'key': '123'} 
    >>> print (a.setdefault('key','456'))
    #显示a这个字典的'key'值的内容,因为字典有，所以不会去设置它 
    123 
    >>> print (a.setdefault('key1','456'))
    #显示a这个字典的'key1'值的内容，因为字典没有，所以设置为456了 
    456 
    >>> a 
    {'key1': '456', 'key': '123'} 

希望本文所述对大家的Python程序设计有所帮助。