python学习备忘之编写一个信用卡程序

女爷i 2022-01-10 15:31 142阅读 0赞

需求分析如下图所示：这里难点就是现金的替换。我这里的思路是每当使用现金的时候。把用户文件的行变成一个列表，在转换成int类型相加减：得到结果之后用fileinput模块进行替换。下面的步骤流水账还在思考当中。当然提现手续费换算很简单，我这里也没有列出，大致已经完成了。取现。充值。购物等三个功能：(由于是运维所以代码很粗糙)

[![wKioL1Q95aPQ5iYrAAHrTcWBpMQ162.jpg][]][wKioL1Q95aPQ5iYrAAHrTcWBpMQ162.jpg]

\#!/usr/bin/python  
import fileinput  
while True:  
name=raw\_input("please input name:").strip()  
if name !="xiaoluo":  
print "please try agine:"  
continue  
password=raw\_input("please input your password:").strip()  
if password !="123456":  
print "please try agine:"  
continue  
break  
while True:  
print "1.check money"  
print "2.shopping"  
print "3.take money"  
print "4.add money"  
print "5.check bill"  
print "6.exit"  
chose=raw\_input("choose:")  
if chose == "1":  
f= open('/python/atmuser.txt')  
c=f.readlines()  
for line in c:  
print line  
if chose == "2":  
chooping = \[\]  
shmoney = \[\]  
fi=file('shopping.txt')  
for lines in fi.readlines():  
p = lines.split()\[0\]  
m = lines.split()\[1\]  
chooping.append(p)  
shmoney.append(m)  
print chooping,shmoney  
\# buy=raw\_input("you can buy thing in this:")  
print "0. car 20000"  
print "1. coffee 350"  
print "2. clothes 2000"  
print "3. bike 2500"  
print "4. maotai 10000"  
buy=int(raw\_input("you can buy thing in this:"))  
f=open('/python/atmuser.txt')  
for c in f.readlines():  
usermoney=c.split()\[1\]  
print usermoney  
if int(usermoney)> int(shmoney\[buy\]) :  
sert=int(usermoney)-int(shmoney\[buy\])  
usermoney=str(sert)  
print usermoney  
\# e=open('/python/atmuser.txt')  
\# for d in e.readlines():  
\# dmoney=d.split()  
\# dmoney\[1\]=str(usermoney)  
\# print dmoney  
for line in fileinput.input('/python/atmuser.txt',inplace=1):  
line =line.replace(c.split()\[1\],usermoney)  
print line,  
else:  
print "your does have no enough money"  
if chose =="3":  
tmoney=raw\_input("please input your amoney of money:")  
f=open('/python/atmuser.txt')  
for c in f.readlines():  
usermoney=c.split()\[1\]  
if int(usermoney)>int(tmoney):  
sert=int(usermoney)-int(tmoney)  
usermoney=str(sert)  
for line in fileinput.input('/python/atmuser.txt',inplace=1):  
line =line.replace(c.split()\[1\],usermoney)  
print line,  
if chose =="4":  
amoney=raw\_input("please input add your amoney of money:")  
f=open("/python/atmuser.txt")  
for c in f.readlines():  
usermoney=c.split()\[1\]  
sert=int(usermoney)+int(amoney)  
usermoney=str(sert)  
for line in fileinput.input('/python/atmuser.txt',inplace=1):  
line =line.replace(c.split()\[1\],usermoney)  
print line,

转载于:https://blog.51cto.com/xiaoluoge/1564240

[wKioL1Q95aPQ5iYrAAHrTcWBpMQ162.jpg]: /images/20220110/6665dc9e935e4711a3ef3698bfcc1919.png