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作业二：编写登陆接口
FlowChart：
代码：
#!usr/bin/env python
# -*- coding:utf-8 -*-
# Author: Wayne Zhong
user = ‘Wayne‘
pwd = ‘123465‘
f = open(‘status.txt‘)
if f.read() == ‘Y‘:
for i in range(3):
username = input(‘Input username:‘)
password = input(‘Input password：‘)
if username == user and password == pwd:
print(‘Welcome login.‘)
break
else:
print(‘User invalid.‘)
else:
f = open(‘status.txt‘,‘w‘)
f.write(‘N‘)
print(‘3 times wrong input, account is blocked.‘)
else:
print(‘Account is blocked.‘)
Flowchart：
代码：
#!usr/bin/env python
# -*- coding:utf-8 -*-
# Author: Wayne Zhong
city_dict = {
‘1.北京‘:{
‘(1)朝阳‘ : [‘1.白静‘, ‘2.邹清‘, ‘3.群众‘],
‘(2)海淀‘ : [‘1.张佳‘, ‘2.王迪‘, ‘3.学霸‘],
‘(3)大兴‘ : [‘1.尹伟‘, ‘2.苏慧‘, ‘3.金良‘]
},
‘2.上海‘:{
‘(1)浦东‘ : [‘1.Andy‘, ‘2.黄渊‘, ‘3.蒋一‘],
‘(2)徐汇‘ : [‘1.马伟‘, ‘2.高成‘, ‘3.吴成‘],
‘(3)宝山‘ : [‘1.刘松‘, ‘2.王丹‘, ‘3.祥子‘]
},
‘3.深圳‘:{
‘(1)罗湖‘ : [‘1.陈建‘, ‘2.范志‘, ‘3.刘洋‘],
‘(2)南山‘ : [‘1.邓明‘, ‘2.黄灿‘, ‘3.陆坤‘],
‘(3)宝安‘ : [‘1.范波‘, ‘2.李松‘, ‘3.王瑶‘]
},
‘4.西安‘:{
‘(1)长安‘ : [‘1.陈琳‘, ‘2.Meth‘, ‘3.何潇‘],
‘(2)雁塔‘ : [‘1.段佳‘, ‘2.邱力‘, ‘3.杨龙‘],
‘(3)未央‘ : [‘1.光圈‘, ‘2.王盼‘, ‘3.孙欢‘]
}
}
def district():
while(1):
d = []
# print (city_dict[city].keys())
print(‘%s 有以下区县：‘ % city)
for i in sorted(city_dict[city].keys()):
print(i) # 将district按行输出
d.append(i) # 将district按列表排列，放入d列表中
# print(d)
district_No = input(‘请输入需查询区县的编号：（后退:b 退出:q）‘)
print(‘---------------------------------------------------------‘)
if district_No == ‘q‘:
print(‘查询结束‘)
exit()
elif district_No == ‘b‘:
break
else:
for i in d:
if district_No in i:
district = i
print(‘%s 有这些朋友：‘% district)
for j in city_dict[city][district]:
print (j)
print(‘---------------------------------------------------------‘)
goon = input(‘查询完成，继续？（Y：继续 其他：结束）‘)
if goon == ‘Y‘:
break
else:
print(‘查询结束‘)
exit()
else:
print(‘区县编号输入错误，请重新输入‘)
while(1):
c = []
d = []
for i in sorted(city_dict.keys()): #
print (i) # 将city按行输出
c.append(i) # 将city按列表排列，放入c列表中
#print (c)
city_No = input(‘请输入需查询城市的编号：（退出:q）‘)
print(‘---------------------------------------------------------‘)
if city_No == ‘q‘: # 如果输入q，则退出
print(‘查询结束‘)
break
else: # 如果没有输入q
for i in c: # 遍历c列表中的城市
#print (i)
if city_No in i: # 如果输入的city_No在遍历的某城市i中
city = i # 把i赋值给city
district()
#print(i)
break
else:
print(‘城市编号输入错误，请重新输入‘) # 如果输入的city_No不在遍历的城市中，重新输入并返回
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原文地址：http://www.cnblogs.com/wnzhong/p/5836072.html
