#2017-05-05 22:10:10
一、用户登录及失败锁定账户
============================================
1.文件读写
2.列表split方法
3.while循环
============================================
##############################
#datafile文件内容
#larry|123123|1
#linzj|123123|0
##############################
#!/usr/bin/env python
# -*- coding:utf-8 -*-
# 打开文件读取用户信息
f1=open('datafile','r')
data=f1.read()
f1.close()
# 用户信息转载入用户信息列表
user_info_list=[] # 初始化user_info_list
user_str_list=data.split('\n')
# print(user_str_list)
for item in user_str_list:
temp=item.split('|')
v={ 'name':temp[0],
'pwd':temp[1],
'times':temp[2]
}
if int(v['times'])!=3: # 将非锁定账户登录信息重置
v['times'] = 0
user_info_list.append(v)
print(user_info_list)
# 登录验证
i=0
j=1
while j==1:
v_user_name = input('user name:')
v_pwd = input('password:')
for item in user_info_list:
if item['name'] == v_user_name and int(item['times'])<3:
if item['pwd'] == v_pwd:
j=2 # 登录成功，设置循环出口
print('welcome back '+v_user_name)
else:
i = int(item['times'])
i += 1
item['times'] = i
print(item)
print(user_info_list)
continue
elif item['name'] == v_user_name and int(item['times'])>=3:
print(v_user_name+' is locked')
else:
continue
print(user_info_list)
# 将用户登录的记录信息赋值给target变量
k=0
target=''
for item in user_info_list:
print(item['name'])
if target!='':
target=target+'\n'
#target.append(item['name']+'|'+item['pwd']+'|'+str(item['times']))
target=target+item['name']+'|'+item['pwd']+'|'+str(item['times'])
print(target)
# 将target变量值写入文件
f2=open('datafile','w')
f2.write(target)
f2.close()
二、元素分类
============================================
1.列表append方法
2.for循环
3.if流程控制
============================================
element_list=[11,22,33,44,55,66,77,88,99]
k1=[]
k2=[]
for item in element_list:
#print(item)
if item<66:
k1.append(item)
else:
k2.append(item)
print(k1,k2)
v_dict={'k1':k1,'k2':k2}
print(v_dict)
三、购物结算及充值
============================================
1.文件的读写操作
2.列表的循环遍历
3.整形与字符串数据类型的相互转换
============================================
#!/usr/src/python
# -*- coding:utf-8 -*-
import re
# 商品初始化
v_goods_list=[
{'name':'电脑','price':'1000'},
{'name':'鼠标','price':'50'},
{'name':'键盘','price':'100'},
{'name':'臭袜子','price':'2'},
]
# 列出商品
for item in v_goods_list:
print(item)
#print(v_goods_list)
# 显示余额
f1=open('balance','r')
balance=f1.read()
f1.close()
# 选择货物
v_aws=1
v_total=0
while v_aws==1:
if v_aws!=1:
break
v_goods=input('选择商品编号:')
v_goods=int(v_goods)
v_num=input('商品数量:')
if v_goods==3:
print('艾玛买了'+v_num+'双'+v_goods_list[v_goods]['name'])
v_num=int(v_num)
#加入购物车
if v_goods<len(v_goods_list):
v_total+=int(v_goods_list[v_goods]['price'])*v_num
print(v_total)
else:
print('编号选择错误！')
v_aws=input('结算?')
v_aws = int(v_aws)
# 结算
j=1
while j==1:
if v_total>int(balance):
print('余额不足,请充值')
v_balance = input('充值金额:')
print(v_balance)
balance = int(v_balance) + int(balance)
print(balance)
elif v_total==0:
pass
else:
balance=balance-v_total
print('购买成功')
j=0
# 余额写回文件保存
f2=open('balance','w')
f2.write(str(balance))
f2.close()
四、三级联动
============================================
字典、列表的相互嵌套
for循环遍历
============================================
#!/usr/src/python
# -*- coding:utf-8 -*-
dic={
'河北':{
'石家庄':["鹿泉", "藁城", "元氏"],
'邯郸':["永年", "涉县", "磁县"]},
'山东':{
'济南':["高阳","趵突泉","泰安"],
'聊城':["青岛","亳州","乾县"]},
'贵州':{
'遵义':["遵县","桐梓","道真"],
'毕节':["纳雍","威宁","黔西"]
}
}
for item in dic.keys():
print(item)
v_fir_region=input('请选择省份')
for item in dic[v_fir_region]:
print(item)
v_sec_region=input('请选择地市')
for item in dic[v_fir_region][v_sec_region]:
print(item)
