python中for循环是可以带else的
python中for循环是可以带else的，不满足for循环的条件，可以执行ELSE的内容！
#!user/bin/env python
#-*-coding:utf-8 -*-
# Author: Sy106
#read userinfo
account='user.txt'
f=file(account)
accountName=f.readlines()
print 'the Auth Names are:',accountName
for i in range(5):
Login=False
#read lock name into local file
username=raw_input('please input your login name:').strip()
lock='lock.txt'
f=file(lock)
lockName_list=[]
for lockName in f.readlines():
lockName=lockName.strip('\n')
lockName_list.append(lockName)
f.close()
print 'lockName_list are:',lockName_list
if username in lockName_list:
print'The user %s has been lock!please use another username!'%username
break
for line in accountName:
line=line.split()
if username==line:#if the name is right ,input the passwd
for j in range(3):
passwd = raw_input('please input your password:').strip()
if passwd==line:
print "Welcome %s login the system!"%username#login success
Login = True
break
else:
f=file(lock,'a')
f.write('%s\n'%username)
f.close()
print 'Enter 3 times wrong password,the name %s is locked'%username
if Login is True:break#jump out of for loop
else:
print 'please input the right name ,retry!'
ifLogin is True:
break#jump out of top for loop
while/if/for 都带else语句
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