max及min函数异常求教!

caesarok

1. 
   
2. >>> dlist=['95', '97', '100', '110', '93', '102', '92', '95', '92', '89', '89', '88', '90', '86', '88', '94', '96', '87', '85', '82', '85', '85', '84', '83', '90', '93', '80', '84', '82', '84', '82', '81', '88', '87', '84', '85', '84', '87', '85', '100', '85', '87', '91', '82', '101', '99', '98', '96', '97', '94', '94', '90', '92', '94', '92', '96', '105', '96', '101', '93', '95', '98', '101', '116', '85', '102', '103', '101', '93', '96', '99', '99', '119', '100', '101', '143', '95', '102', '94', '98', '104', '107', '97', '100', '110', '94', '90', '92', '88', '101', '104', '94', '113', '103', '90', '102', '106', '110', '121', '103', '94', '90', '95', '101', '97', '93', '110', '115', '150', '104', '107', '108', '100', '97', '125', '103', '96', '95', '95', '98', '110', '114', '98', '104', '124', '126', '103', '128', '96', '112', '100', '112', '111', '115', '132', '98', '99', '118', '106', '110', '97', '114', '101', '106', '101', '100', '95', '102', '95', '89', '107', '88', '105', '93', '91', '91', '95', '90', '84', '87', '91', '94', '88', '90', '91', '86', '81', '83', '92', '86', '86', '84', '84', '88', '85', '86', '87', '107', '88', '82', '86', '85', '85', '87', '85', '89', '86', '88', '91', '89', '91', '92', '89', '101', '100', '101', '92', '102', '103', '92', '108', '90', '89', '114', '96', '103', '96', '104', '97', '118', '21', '21', '21', '21', '21', '21', '21', '21', '21', '21', '21', '21', '21', '21', '21', '21', '21', '21', '21', '21', '21', '21', '101', '92', '103', '101', '111', '114', '103', '101', '101', '99', '87', '92', '92', '102', '101', '98', '99', '94', '107', '88', '91', '96']
   
3. >>> max(dlist)
   
4. '99'
   
5. >>> min(dlist)
   
6. '100'
   

复制代码

明明最大的不是99,而最小的也不是100, 为何出这样的错.

[ 本帖最后由 caesarok 于 2009-4-5 18:48 编辑 ]

izhier

这个正确呀
字符串的比较

caesarok

那我怎么把他们按数值大小进行比较呢

我得出的其他列表却正确的.而这个就出这样的错了,
麻烦指教!

[ 本帖最后由 caesarok 于 2009-4-5 19:32 编辑 ]

izhier

把dlist列表的字符串元素转换为数字
dlist = [95, 100, 101]
max(dlist)

izhier

注意：字符串和数字的区别

caesarok

我这里有个长的代码,

1. 
   
2. #!/usr/bin/env python
   
3. #-*-coding:gbk
   
4. from urllib import urlretrieve
   
5. 
   
6. 
   
7. def searchd(g,machine):
   
8.     import re
   
9.     try:
   
10.         dlist=[]
    
11.         fg=open(g,"r")
    
12.         for i in fg:
    
13.             i=i.strip()
    
14.             dlist += re.findall(r'\d+$', i)
    
15.         print 'dlist内容%s \n 最后一个%s 第一个%s'%(dlist,dlist[len(dlist)-1],dlist[0])
    
16.         f=open("log.txt","a+")
    
17.         print '处理2 %s'%machine
    
18.         f.write('\n%s '%machine)
    
19.         avg=sum([int(i) for i in dlist])/len(dlist)
    
20.         f.write('平均值avg: %s '%avg)
    
21.         maxd=max(dlist)
    
22.         f.write("最大值:  %s "%maxd)
    
23.         mind=min(dlist)
    
24.         f.write("最小值:  %s "%mind)
    
25.         last=dlist[len(dlist)-1]
    
26.         f.write("最后值:  %s "%last)
    
27.         f.close()
    
28.         fg.close()
    
29.     except (IOError,ZeroDivisionError),args:
    
30.         print '%s%s不存在'%(args,machine)
    
31.        
    
32. 
    
33.             
    
34. 
    
35. def firstLast(webpage,machine):
    
36.     try:
    
37.         f = open(webpage)
    
38.         lines = f.readlines()
    
39.         f.close()
    
40.         g="page.txt"
    
41.         file1=open(g,"w+")
    
42.         file1.writelines(lines)
    
43.         file1.close()
    
44.         searchd(g,machine)
    
45.     except IOError,args:
    
46.        print args
    
47.        pass
    
48.       
    
49. 
    
50. #url='http://192.168.1.161/monitor/is13084905-0112/net.txt'
    
51. #for i in file("machine.txt"):
    
52.    #download('http://192.168.1.161/monitor/%s/net.txt'%i)
    
53. def download(url,machine,process=firstLast):
    
54.     try:
    
55.         retval = urlretrieve(url)[0]
    
56.         print '处理1 %s'%machine
    
57.     except IOError:
    
58.         retval = None
    
59.         pass
    
60.     if retval:                # do some processing
    
61.         process(retval,machine)
    
62. 
    
63. 
    
64. def tryk():
    
65.      g=file("t1.txt")
    
66.      f=g.readlines()
    
67.      for i in f:
    
68.          machine=i.strip()
    
69.          url='http://192.168.1.161/monitor/%s/net.txt'%machine
    
70.          print machine
    
71.              download(url,machine)
    
72.          
    
73.        
    
74. if __name__ == '__main__':
    
75.     tryk()
    
76.              
    

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page.txt内容为
2009-04-04  0:02:39.15    net static
-----------------------------------------------
2009-04-04  0:05:04.75 TCP Connections:    95
2009-04-04  0:15:04.75 TCP Connections:    97
2009-04-04  0:25:04.90 TCP Connections:    100
2009-04-04  0:35:04.75 TCP Connections:    110
2009-04-04  0:45:04.73 TCP Connections:    93
2009-04-04  0:55:04.76 TCP Connections:    102
2009-04-04  1:05:04.76 TCP Connections:    92
2009-04-04  1:15:04.75 TCP Connections:    95
2009-04-04  1:25:04.75 TCP Connections:    92
2009-04-04  1:35:04.71 TCP Connections:    89
2009-04-04  1:45:04.76 TCP Connections:    89
2009-04-04  1:55:04.78 TCP Connections:    88
如果改成数值应怎么改呀

[ 本帖最后由 caesarok 于 2009-4-5 19:41 编辑 ]

izhier

加上一句：

1. 
   
2. for i in range(len(dlist)):
   
3.     dlist[i] = int(dlist[i])
   

复制代码

caesarok

太感谢了,问题解决了!
看能不能再帮我优化一下代码

[ 本帖最后由 caesarok 于 2009-4-5 19:57 编辑 ]

千年沉寂

加一句： dlist=[int(x) for x in dlist]
把字符型转换为数字型

victorlee129

dist=map(int,dist)