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 ref=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->1111.172.249.84->2111.172.249.85->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。