Python练习程序（三）函数练习--ATM模拟
功能要求：
额度15000
可以提现，手续费5%
记录消费流水
支持每月账单查询
提供还款接口
调用的相关模块：
import time #time模块，提供各种操作时间的函数
time.strftime("%Y-%m-%d %X", time.localtime())
'2015-12-15 23:35:26'
import getpass #getpass 模块 -> 命令行下输入密码的方法
pwd = getpass.getpass('password: ')
print pwd
import pickle #pickle模块，序列化Python对象
#保存数据到 Pickle 文件
>>> dic = {}
>>> import pickle
>>> with open('dic.pickle', 'wb') as f:
... pickle.dump(dic, f)
...
#从Pickle文件读取数据
>>> import pickle
>>> with open('dic.pickle', 'rb') as f:
... dic = pickle.load(f)
...
1、用户数据通过字典序列化存入account.pickle
cat account.py
#!/usr/bin/env python
#coding=utf-8
import pickle
account = {'1001':{'name':'fgf','pw':123,'money':15000,'balance':15000},
'1002':{'name':'user','pw':123,'money':15000,'balance':15000}}
f = file('account.pickle','wb')
pickle.dump(account,f)
f.close()
with open('account.pickle', 'rb') as f:
dic = pickle.load(f)
f.close()
print dic
2、Python程序
#!/usr/bin/env python
#coding=utf-8
import sys,pickle,getpass,time
#日志函数
def log(user,describe,fee,balance,**userinfo):
time1 = time.strftime("%Y-%m-%d %X", time.localtime())
f = file('account.log','a')
f.write("%s %s %s ￥%s ￥%s\n" %(time1,user,describe,fee,balance))
f.close()
f1 = file('account.pickle','wb')
pickle.dump(userinfo,f1)
f1.close()
#提现函数
def withdraw(user,**userinfo):
fee = int(raw_input("请输入提现金额："))
if fee % 100 ==0 and int(fee*1.05) <= userinfo[user]['balance']:
charge = fee * 0.05
balance = userinfo[user]['balance'] - fee - charge
userinfo[user]['balance'] = balance
log(user,"取现(手续费%d)"%charge,fee,balance,**userinfo)
print "你成功取现%d，收取手续费%s，剩余额度%s" %(fee,charge,balance)
else:
print "输入金额有误。"
#还款函数
def repay(user,**usrinfo):
fee = int(raw_input("请输入还款金额："))
userinfo[user]['balance'] += fee
balance = userinfo[user]['balance']
log(user,"信用卡还款",-fee,balance,**userinfo)
print "你成功还款%d,当前可用额度%s" %(fee,balance)
#账单查询
def bills(user):
f = file('account.log','r')
time = raw_input("请输入查询的时间(格式:yyyy-mm)：")
match_yes = 0 #匹配标示
for line in f.readlines():
if user in line and time in line:
print line,
match_yes = 1
if match_yes == 0 : print"没有查询月份账单"
with open('account.pickle','rb') as f:
userinfo = pickle.load(f)
f.close()
while True:
user = raw_input("\33[1;32;40m请输入用户名：\33[0m")
i = 1
while userinfo.has_key(user):
passwd = int(getpass.getpass("\33[1;32;40m请输入密码：\33[0m"))
while passwd == userinfo[user]['pw']:
i = 1
print "欢迎进入系统，请选择操作:"
choice = int(raw_input("提现 1\t还款 2\t账单查询 3\t 额度查询 4\t 退出 0\n"))
if choice == 1: withdraw(user,**userinfo)
elif choice == 2: repay(user,**userinfo)
elif choice == 3: bills(user)
elif choice == 4: print "总额度：",userinfo[user]['money'],"当前额度",userinfo[user]['balance']
elif choice == 0: sys.exit()
else:
i = i + 1
print"密码错误！"
if i == 4 : break
else : print "没有这个账户。"