面向对象高级实战演练之银行系统
功能说明：1 - 银行管理员(使用管理员密码)查看所有用户信息
2 - 进入银行系统提示功能
3 - 用户密码管理
4 - 账户开户/销户
5 - 存款/取款
6 - 用户间转账
7 - 用户余额查询
8 - 常见错误检查和提示代码实现：
import random
import string
class Account(object):
def __init__(self, name, password, money):
self.user_id = self.__get_random_char(6)
self.name = name
self.password = password
self.money = money
print(f"""
成功创建账户!
【账户ID】: {self.user_id}
【账户名】:{self.name}
【账户余额】: {self.money}
""")
@staticmethod
def __get_random_char(num):
all_str = string.ascii_uppercase + string.digits
str_list = random.choices(all_str, k=num)
return "".join(str_list)
class Bank:
def __init__(self, name, admin_pwd):
self.name = name
self.admin_pwd = admin_pwd
self.accounts = dict()
self.api_map = None
def add_order_set(self, api_map):
setattr(self, "api_map", api_map)
self.query_support_func(custom=True)
def api(self, input_order):
if not isinstance(self.api_map, dict):
print("请先添加接口指令集！")
return
func_tuple = self.api_map.get(input_order)
if func_tuple:
func_tuple()
else:
print(f"指令 {input_order} 暂未收录, 请在先在接口指令集中添加指令！")
def checkout_account_by_id(self, account_id=None, *args):
if account_id in self.accounts:
return self.accounts
else:
print(f"未查询到该账号在本银行的账户信息！请先开户或重新确认银行账号！")
return None
def check_pwd_correct_by_AccountID(self, account_id=None, input_num=3, *args):
account_id = account_id or input("请输入账户ID: ")
account = self.checkout_account_by_id(account_id)
for _ in range(input_num):
pwd = input("请输入操作密码: ")
if account.password == pwd:
return True
else:
print(f"账户 {account.user_id} 密码输出错误, 请重新输入！")
else:
print("密码输入错误超过尝试次数！")
return False
def query_all_user(self, input_num=2, *args):
for _ in range(input_num):
pwd = input("请输入管理员密码: ")
if self.admin_pwd == pwd:
print(f"共计 {len(self.accounts)} 名用户；名单如下: ")
for index, account in enumerate(self.accounts.values()):
print(f"{index + 1} >>【账户ID】: {account.user_id}【账户名】: {account.name}【账户余额】: {account.money}")
return
else:
print(f"密码输出错误, 请重新输入！")
else:
print("密码输入错误超过尝试次数！")
def query_support_func(self, custom=False, *args):
if not custom:
print(f"""
===== 欢迎进入【{self.name}银行】系统 =====
【本银行支持以下业务】:
<查询可办理的业务>
<查询余额>
<存取款>
<转账>
<账户开户>
<账户销户>
""")
elif custom and isinstance(self.api_map, dict):
menu_str = f"""
===== 欢迎进入【{self.name}银行】系统 =====
<本银行支持以下业务>:
【指令】\t\t=>\t\t【功能说明】
"""
for custom_order, func_tuple in self.api_map.items():
if isinstance(custom_order, (int, str)) and len(func_tuple) == 2 and isinstance(func_tuple, str):
menu_str += f"""{custom_order}\t\t=>\t\t"{func_tuple}"\n\t\t\t"""
else:
print("""
自定义指令集格式错误，请按如下格式设置指令集:
{
操作指令1:(功能函数1, 功能描述1),
操作指令2:(功能函数2, 功能描述2),
.....
}
""""")
print(menu_str)
else:
print("自定义指令集格式错误")
def query_money(self, account_id=None, *args):
print("\n-------------------【正在查询】-------------------")
account_id = account_id or input("请输入查询账户ID: ")
account = self.checkout_account_by_id(account_id)
if not account or not self.check_pwd_correct_by_AccountID(account_id):
return
print(f"""
【账户ID】: {account.user_id}
【账户名】:{account.name}
【账户余额】: {account.money}
""")
def add_money(self, account_id=None, a_money=None, *args):
print("\n-------------------【正在存入】-------------------")
account_id = account_id or input("请输入存入账户ID: ")
account = self.checkout_account_by_id(account_id)
if not account:
return
money = a_money or float(input("请输入存款金额: "))
account.money += money
print(f"用户 {account.name} 名下账户【{account_id}】成功存入 {money} 元,【账户余额】:{account.money}")
return money
def reduce_money(self, account_id=None, r_money=None, *args):
print("\n-------------------【正在支取】-------------------")
account_id = account_id or input("请输入支取账户ID: ")
account = self.checkout_account_by_id(account_id)
money = r_money or float(input("请输入支取金额: "))
if not account or not self.check_pwd_correct_by_AccountID(account_id):
return
if account.money < money:
print("账户余额不足!")
return
account.money -= money
print(f"用户 {account.name} 账户【{account_id}】成功支取 {money} 元,【账户余额】:{account.money}")
return money
def transfer_money(self, *args):
print("\n-------------------【转账中..... 】-------------------")
transfer_out_account_id = input("请输入金额转出账户ID: ")
transfer_out_account = self.checkout_account_by_id(transfer_out_account_id)
if not transfer_out_account:
return
transfer_in_account_id = input("请输入金额转入账户ID: ")
transfer_in_account = self.checkout_account_by_id(transfer_in_account_id)
if not transfer_in_account:
return
money = self.reduce_money(transfer_out_account_id)
if money is not None:
self.add_money(transfer_in_account_id, money)
def create_account(self, *args):
name = input("请输入账户名: ")
password = input("请输入账户密码: ")
account = Account(name, password, money=0)
self.accounts = account
return account
def del_account(self, *args):
account_id = input("请输入账户ID: ")
account = self.checkout_account_by_id(account_id)
if not account or not self.check_pwd_correct_by_AccountID(account_id):
return
if account.money != 0:
print("账户余额不为0,请先取出余额以后再操作!")
return
self.accounts.pop(account_id)
print(f"账户【{account_id}】成功销户")
return True
def custom():
print("这里是自定义功能函数!")
kylin = Bank("麒麟", "999999")
func_map = {
# 操作指令:(功能函数, 功能描述)
"admin": (kylin.query_all_user, "管理员操作"),
"业务办理": (kylin.query_support_func, "查询可办理的业务"),
"余额查询": (kylin.query_money, "查询余额"),
"存款": (kylin.add_money, "存款"),
"取款": (kylin.reduce_money, "取款"),
"转账": (kylin.transfer_money, "转账"),
"开户": (kylin.create_account, "账户开户"),
"销户": (kylin.del_account, "账户销户"),
"其他业务": (custom, "其他业务办理"),
}
kylin.add_order_set(func_map)
while True:
order = input("请选择您需要办理的业务: ")
kylin.api(order)效果展示：
来源:https://www.cnblogs.com/cs-songbai/p/18105603
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