本文共 1226 字,大约阅读时间需要 4 分钟。
1》法一: song@ubuntu:~$ vi find2.py song@ubuntu:~$ more find2.py l=[1,2,3,4,7,2,5,6,2,8,9,0] first=0 for i in range(l.count(2)): new_l=l[first:] index=first+new_l.index(2) print 'find the index of 2:',index first=index+1 song@ubuntu:~$ python find2.py find the index of 2: 1 find the index of 2: 5 find the index of 2: 8 song@ubuntu:~$ 2》法二: song@ubuntu:~$ vi find_2.py song@ubuntu:~$ more find_2.py l=[2,2,3,4,5,1,2,3,1,2,3,4,5] first=True for i in range(l.count(2)): if first==True: pos=l.index(2) first=False else: pos=l.index(2,pos+1)print pos
song@ubuntu:~$ python find_2.py 0 1 6 9 song@ubuntu:~$ 3》法三: song@ubuntu:~$ vi find_2_1.py song@ubuntu:~$ more find_2_1.py l=[2,2,3,4,5,1,2,3,1,2,3,4,5] for i in range(len(l)): if l[i]==2:print i
song@ubuntu:~$ python find_2_1.py 0 1 6 9song@ubuntu:~$
4》法四:
song@ubuntu:~$ vi find_2.py
song@ubuntu:~$ more find_2.py l=[2,2,3,4,5,1,2,3,1,2,3,4,5] for i in range(l.count(2)): if i==0: pos=l.index(2) else: pos=l.index(2,pos+1) print pos song@ubuntu:~$ python find_2.py 0 1 6 95》法五:
song@ubuntu:~$ vi find_2.py
song@ubuntu:~$ more find_2.py l=[2,2,3,4,5,1,2,3,1,2,3,4,5] pos=-1 for i in range(l.count(2)): pos=l.index(2,pos+1) print pos song@ubuntu:~$ python find_2.py 0 1 6 9(完)
转载地址:http://mcyai.baihongyu.com/