http://bbs.chinaunix.net/thread-1680208-1-1.html
http://www.cnblogs.com/feisky/archive/2012/12/06/2805251.html
比较容易记忆的是用内置的set
l1 = ['b','c','d','b','c','a','a']l2 = list(set(l1))print l2还有一种据说速度更快的，没测试过两者的速度差别l1 = ['b','c','d','b','c','a','a']l2 = {}.fromkeys(l1).keys()print l2这两种都有个缺点，祛除重复元素后排序变了：['a', 'c', 'b', 'd']如果想要保持他们原来的排序：用list类的sort方法l1 = ['b','c','d','b','c','a','a']l2 = list(set(l1))l2.sort(key=l1.index)print l2也可以这样写l1 = ['b','c','d','b','c','a','a']l2 = sorted(set(l1),key=l1.index)print l2也可以用遍历l1 = ['b','c','d','b','c','a','a']l2 = []for i in l1: if not i in l2: l2.append(i)print l2上面的代码也可以这样写l1 = ['b','c','d','b','c','a','a']l2 = [][l2.append(i) for i in l1 if not i in l2]print l2这样就可以保证排序不变了：['b', 'c', 'd', 'a']转自：http://blog.csdn.net/rainharder/article/details/5728443
1 #!/usr/bin/env python 2 # coding: utf-8 3 4 import os 5 import sys 6 import string 7 import operator 8 import re 9 import threading10 import csv11 12 from time import sleep,ctime13 from collections import defaultdict14 from collections import Counter15 16 17 def test_01():18 #content ==> ###pos=350143600,pts=2676718###19 #filename="F:\\yingc\\work\\goxceed-dvbs-hd\\6605\\solution\\aa"20 filename="./aa"21 pos=-122 dts=-123 poslist=[]24 dtslist=[]25 26 str1="###pos="27 str2=",pts="28 29 f = open(filename)30 for line in f:31 aa=line[0:len(str1)]32 if aa == str1:33 pos=line[len(str1):line.index(str2)]34 dts=line[line.index(str2)+len(str2):len(line)-3-1]35 poslist.append(pos)36 dtslist.append(dts)37 f.close()38 39 #s=[11,22,11,44,22,33]40 d = defaultdict(list)41 for k,va in [(v,i) for i,v in enumerate(poslist)]:42 d[k].append(va)43 #print d.items()44 count=045 for value in d.items():46 if len(value[1])>1:47 print value48 count=count+149 print "poslen:"+str(len(poslist))+",dtslen"+str(len(dtslist))50 print str(len(d))+","+str(count)51 52 #d = defaultdict(list)53 #for k,va in [(v,i) for i,v in enumerate(dtslist)]:54 # d[k].append(va)55 ##print d.items()56 #for value in d.items():57 # if len(value[1])>1:58 # print value59 60 #print Counter([11,22,11,44,22,33])61 62 63 64 65 if __name__ == "__main__":66 test_01()67 print "finish"68
aa文件中的内容如：
###pos=1349796,pts=15015######pos=2337820,pts=27986######pos=2705098,pts=29988######pos=6660200,pts=54721######pos=8055314,pts=61061######pos=8871800,pts=65315######pos=9503420,pts=68401######pos=12855218,pts=88338######pos=14253082,pts=98765######pos=15813764,pts=109192######pos=15813764,pts=109192######pos=15813764,pts=109192######pos=15813764,pts=109192######pos=16056146,pts=110735######pos=16394580,pts=113988######pos=17011532,pts=119911######pos=17257542,pts=122372######pos=17417974,pts=124040######pos=17816976,pts=128169######pos=17993398,pts=129838######pos=18302190,pts=132215######pos=19166088,pts=139055######pos=19675276,pts=143059######pos=19994992,pts=146146###