首先画出流程图，流程图与现实代码有出入，因为刚开始画流程图的时候，有些东西没考虑进去，后来写着写着就慢慢能想起来并实现了。

另有一点经验推荐给新手朋友，如果说碰到一个项目无从下手的话，就先慢慢去写，写着写着你就会往下写了，真的，亲身实践。望大神勿喷~

#!/usr/bin/env python

#encoding:utf-8

import re

import pickle

import time

def getUser():

'''从数据文件里获取银行卡用户信息'''

with open('cardinfo.db','r') as f:

return pickle.load(f)

def panDing():

'''判定用户银行卡信息跟密码信息的准确性'''

while True:

user_dict=getUser()

print user_dict

card_num=raw_input('请输入您的19位银行卡号(只包含数字)：')#获取用户卡号

if re.match('\d{19}',card_num) and card_num in user_dict:#判断卡号是否匹配

card_passwd=(raw_input('请输入您的银行卡密码：'))

# print '输入的密码是：%s,类型为：%s' % (int(card_passwd),type(int(card_passwd)))

# print '存的密码是：%s,类型为：%s' % (user_dict[card_num]['password'],type(user_dict[card_num]['password']))

if int(card_passwd) == user_dict[card_num]['password']:#判定密码对错

break

else:

print '密码错误！'

continue

else:

print '您输入的银行卡信息有误！'

return card_num

def zhuanZhang(srcaccount):

'''用户转账操作'''

user_dict = getUser()

while True:

target_account = raw_input('请输入目标账户：')

if re.match('\d{19}', target_account) :

if target_account in user_dict: # 判断卡号是否匹配

while True:

tr_balance = int(raw_input('请输入转账金额：'))

if tr_balance <= user_dict[srcaccount]['balance']:#对比转账金额跟账户余额

break

else:

print '转账金额大于余额,请重新输入余额！'

break

else:

print '卡号错误，请重新输入!'

else:

print '卡号不对'

print '转入的账户为：%s ，金额为:%s' % (target_account,tr_balance)

print '原账户为：%s ，余额为:%s' % (srcaccount,user_dict[srcaccount]['balance'])

print user_dict

user_dict[srcaccount]['balance']=user_dict[srcaccount]['balance']-tr_balance

user_dict[target_account]['balance'] = user_dict[target_account]['balance'] + tr_balance

print '转入的账户为：%s ，转入的金额为:%s' % (target_account, tr_balance)

# print '转入账户为：%s ，余额为:%s' % (target_account, user_dict[target_account]['balance'])

print '原账户为：%s ，余额为:%s' % (srcaccount, user_dict[srcaccount]['balance'])

print user_dict

with open('cardinfo.db','w') as f:

pickle.dump(user_dict,f)

with open('op.log','a+') as f:

f.writelines('%s 账户%s转入到账户%s中%s人民币' % (time.strftime('%Y-%m-%d %H:%M:%S'),srcaccount,target_account,tr_balance),f)

print '%s 账户%s转入到账户%s中%s人民币' % (time.strftime('%Y-%m-%d %H:%M:%S'),srcaccount,target_account,tr_balance)

def quXian(user_card):

'''用户取现操作'''

user_dict = getUser()

while True:

qx_balance=raw_input('请输入取现金额：')

if re.match('\d+',qx_balance):

print user_dict[user_card]['balance']

if int(qx_balance) <= user_dict[user_card]['balance']:

user_dict[user_card]['balance'] = user_dict[user_card]['balance'] - int(qx_balance)

print user_dict

with open('cardinfo.db', 'w') as f:

pickle.dump(user_dict, f)

with open('op.log', 'a') as f:

f.write('%s 账户 %s 取现人民币 %s' % (time.strftime('%Y-%m-%d %H:%M:%S'), user_card,qx_balance))

print '%s 账户[%s]取现人民币%s圆' % (time.strftime('%Y-%m-%d %H:%M:%S'), user_card,qx_balance)

break

else:

print '余额不够！'

else:

print '输入的格式有误'

# with open('cardinfo.db','r') as f:

# print pickle.load(f)

# with open('op.log','r') as f:

# print pickle.load(f)

def chaBalance(user_dict,user_card):

print '账户余额为：%s ' % user_dict[user_card]['balance']

def run():

user_card = panDing()

print user_card

while True:

user_dict=getUser()

# print '账户余额为：%s ' % user_dict[user_card]['balance']

choose_num=raw_input('请确认操作：(转账请按1,取现请按 2,余额查询请按3,退出请按4):')

if re.match('[1234]',choose_num):#根据用户选择类型判断执行方法

if re.match('[1234]',choose_num).group() == '1':#转帐

zhuanZhang(user_card)

elif re.match('[1234]',choose_num).group() == '2':#取现

quXian(user_card)

elif re.match('[1234]',choose_num).group() == '3':#余额查询

chaBalance(user_dict, user_card)

else:#退出

break

if __name__ == '__main__':

run()

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。

本文标题: python 模拟银行转账功能过程详解

本文地址: http://www.cppcns.com/jiaoben/python/267579.html