多级菜单

# -*- coding: utf-8 -*-
__author__ = 'am_mm_NO.1'
import re
memu = {
"东北":{
"吉林省":{
"吉林市":['吉林市1','吉林市2'],
"长春":['长春1','长春2'],},
"辽宁省":{
"沈阳":['沈阳1','沈阳2','沈阳3'],
"大连":['大连1','大连2'],
},
},
'华北':{
'河北省':{
'廊坊':['廊坊1','廊坊2'],
'保定':['保定1','保定2'],
},
'内蒙古':{
'呼和浩特':['呼和浩特1','呼和浩特2','呼和浩特3'],
'包头':['包头1','包头2']
},

},
}
flag = True
while flag: # 全局变量，设置跳出整个循环
for i,v in enumerate(memu.keys()): #遍历第一层字典
print i,v #打印出第一层key,value
num_1=raw_input("请输入一级菜单号,按q退出：").strip()  #接受键盘输入
if num_1 == 'q':
flag = False
break
if num_1.isdigit():
num_1=int(num_1)
if num_1<= len(memu):
key_1 = memu.keys()[num_1]
while flag:
for i1,v1 in enumerate(memu[key_1]):
print i1,v1
num_2 = raw_input("请输入二级菜单号,按q退出,b返回：").strip()
if num_2 == 'q':
flag = False
break
if num_2 == 'b':
break
if num_2.isdigit():
num_2 = int(num_2)
if num_2 <= len(memu[key_1]):
key_2 = memu[key_1].keys()[num_2]
while flag:
for i2,v2 in enumerate(memu[key_1][key_2]):
print i2 ,v2
num_3 = raw_input("请输入三级菜单号,按q退出,b返回：").strip()
if num_3 == 'q':
flag = False
break
if num_3 == 'b':
break
if num_3.isdigit():
num_3 = int(num_3)
if num_3 <= len(memu[key_1][key_2]):
key_3 = memu[key_1][key_2].keys()[num_3]
while flag:
for i3,v3 in enumerate(memu[key_1][key_2][key_3]):
print i3,v3
num_4 = raw_input("按q退出,b返回：").strip()
if num_4 == 'q':
flag = False
break
if num_4 == 'b':
break

#!/usr/bin/python
# -*- coding: utf-8 -*-

__author__ = 'am_mm_NO.1'
import re
memu = {
"东北":{
"吉林省":{
"吉林市":['吉林市1','吉林市2'],
"长春":['长春1','长春2'],
},
"辽宁省":{
"沈阳":['沈阳1','沈阳2','沈阳3'],
"大连":['大连1','大连2'],
},
},
'华北':{
'河北省':{
'廊坊':['廊坊1','廊坊2'],
'保定':['保定1','保定2'],
},
'内蒙古':{
'呼和浩特':['呼和浩特1','呼和浩特2','呼和浩特3'],
'包头':['包头1','包头2']
},
},
'shanghai':{
'pudong':{
'pudong1':['com1','com2'],
'pudong2':['it1','it2'],
},
'xuhui':{
'xuhui1':['xuhui11','xuhui12','xuhui33'],
'xuhui2':['xuhui21','xunhui22']
},

}
}

#for i in enumerate(memu.keys()):
#    print i
exit_flag = False
while not exit_flag:
for index,key in enumerate(memu.keys()):
print index,key
choice_1 = raw_input("please choose menu_1 to enter:")
if choice_1.isdigit():
choice_1 = int(choice_1)
key_1 =  memu.keys()[choice_1]
while not exit_flag:
for index,key in enumerate(memu[key_1]):
print '--->', index,key
#print "=========="
choice_2 = raw_input("please choose menu_2 to enter:")
if choice_2.isdigit():
choice_2 = int(choice_2)
key_2 = memu[key_1].keys()[choice_2]
elif choice_2 == 'quit':
print '到上一级目录'
exit_flag = True
break
elif choice_2 == 'back':
break

while not exit_flag:
for index,key in enumerate(memu[key_1][key_2]):
print '--->--->', index,key
choice_3 = raw_input("please choose menu_3 to enter:")
if choice_3.isdigit():
choice_3 = int(choice_3)
elif choice_3 == 'quit':
print '到上一级目录'
exit_flag = True
break
elif choice_3 == 'back':
break

key_3 = memu[key_1][key_2].keys()[choice_3]
#print "this is the last level ..."
while not exit_flag :
for index,key in enumerate(memu[key_1][key_2][key_3]):
print '--->--->--->', index,key
choice_4 = raw_input("please choose menu_4 to enter:")
if choice_4.isdigit():
print "this is the last level ..."
elif choice_4 == 'quit':
print '到上一级目录'
exit_flag = True
break
elif choice_4 == 'back':
break
#else:
#   break
else:
print "=========="