本文實例講述了python統計日志ip訪問數的方法。分享給大家供大家參考。具體如下：
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])日志格式為：
#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)"
輸出結果：
111.172.249.86->1111.172.249.84->2111.172.249.85->1
注釋：python字段的setdefault用法為獲取信息，如果獲取不到的時候就按照他的參數設置該值
>>> a={} >>> a['key']='123' >>> print (a) {'key': '123'} >>> print (a.setdefault('key','456'))#顯示a這個字典的'key'值的內容,因為字典有，所以不會去設置它 123 >>> print (a.setdefault('key1','456'))#顯示a這個字典的'key1'值的內容，因為字典沒有，所以設置為456了 456 >>> a {'key1': '456', 'key': '123'} 希望本文所述對大家的Python程序設計有所幫助。
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