python银⾏管理系统（运⽤了⽂件操作）
系统要能实现⼀下功能：
开户功能：根据⽤户输⼊的姓名，⾝份证号，电话号，预存⾦额，密码等信息，若⽆误后，就会获得系统随机⽣成⼀个不重复的由6位数字组成的银⾏账号。
查询功能：如果⽤户的账号和密码输⼊正确，就可以查询⾃⼰卡内的⾦额。
取款功能：如果⽤户的账号和密码输⼊正确的前提下，可以取出卡内的⾦额，若取出的⾦额⼤于卡内的⾦额，则会终⽌此次交易，并会提⽰银⾏卡内余额不⾜。若卡内⾦额⼤于等于要取款的⾦额，则可以正常取款。
存款功能：如果⽤户的账号和密码输⼊正确的前提下，可以存⼊到卡内的⾦额中，若存款的⾦额⼩于0，则会终⽌此次交易，并会提⽰银⾏存款⾦额不对。
转账功能：如果⽤户的账号和密码输⼊正确的前提下，可以向已经在本⾏中注册⽣成的其他账号进⾏转账服务（只需要知道转账对象的卡号）。若输⼊的卡号未在本⾏中注册过，则会终⽌此次交易。
锁定功能：银⾏管理员可以对信誉度不好的⽤户进⾏账号锁定，锁定的账号不能进⾏存款，取款，查询，转账功能。
解锁功能：银⾏管理员可以对账号锁定的⽤户进⾏解锁操作，解锁后的账号恢复存款，取款，查询，转账功能。
import random
class bank():
def kaihu(self):#开户
name = input("请输⼊您的姓名：")
nid = input("请输⼊您的⾝份证号码：")
tel =  input("请输⼊您的电话号码：")
yc =  float(input("请输⼊您预存⾦额："))
users = random.randint(100000,999999)
flag = True
while flag:
ist(str(users)) is True:
users = random.randint(100000,999999)
ist(str(users)) is False:
flag =False
bank = str(users) + "-" + password + "-" + name + "-" + nid + "-" + tel + "-" + str(yc) + "-" +"True"+"\n"        with open("","a+") as file:
file.write(bank)
diayc[users] = yc
dia[users] = password
print(users)
print("开户成功！")
def select(self):#查询
users = int(input("请输⼊您的账号："))
password = input("请输⼊您的密码：")
with open("","r") as f:
lines = f.readlines()
for line in lines:
users1 = line.split("-")[0]
password1 = line.split("-")[1]
if line.split("-")[6] == "True\n":
if password == password1 and str(users) == users1:
yuan = line.split("-")[5]
print("您的⾦额为："+yuan)
else:
print("账号已被锁定!⽆法进⾏查询")
def qukuan(self):#取款
users = int(input("请输⼊您的账号："))
password = input("请输⼊您的密码：")
with open("","r") as f:
lines = f.readlines()
for line in lines:
password1 = line.split("-")[1]
users1 = line.split("-")[0]
if line.split("-")[6] == "True\n":
if password == password1 and str(users) == users1:
yuan = float(line.split("-")[5])
print("您的⾦额为："+str(yuan))
i = float(input("输⼊您要取款⾦额："))
yuan = yuan - i
if yuan >= 0:
print("取款成功")
else:
print("卡内余额不⾜")
break
with open("","r") as f:
grow = f.readlines()
with open("","w+") as f1:
if str(users) in i:
name=line.split("-")[2]
nid = line.split("-")[3]
tel = line.split("-")[4]
bank = str(users) + "-" + password + "-" + name + "-" + nid + "-" + tel + "-" + str(yuan) + "-" +"True"+"\n"
f1.write(bank)
continue
f1.write(i)
else:
print("账号已被锁定!⽆法进⾏取款")
def cunkuan(self):#存款
while count<3:
users = int(input("请输⼊您的账号："))
password = input("请输⼊您的密码：")
writelines在python中的用法with open("","r") as f:
lines = f.readlines()
for line in lines:
password1 = line.split("-")[1]
users1 = line.split("-")[0]
if line.split("-")[6] == "True\n":
if password == password1 and str(users) == users1:
yuan = float(line.split("-")[5])
print("您的⾦额为："+str(yuan))
i = float(input("输⼊您要存款⾦额："))
yuan = yuan + i
if i >= 0:
print("存款成功")
else:
print("存款⾦额输⼊有误")
break
with open("","r") as f:
grow = f.readlines()
with open("","w+") as f1:
for i in grow:
if str(users) in i:
name=line.split("-")[2]
nid = line.split("-")[3]
tel = line.split("-")[4]
bank = str(users) + "-" + password + "-" + name + "-" + nid + "-" + tel + "-" + str(yuan) + "-" +"True" +"\n"
f1.write(bank)
continue
f1.write(i)
else:
print("账号已被锁定!⽆法进⾏存款")
def zhuanzhang(self):
users = int(input("请输⼊您的账号："))
password = input("请输⼊您的密码：")
with open("","r") as f:
lines = f.readlines()
for line in lines:
if line.split("-")[6] == "True\n":
if password == password1 and str(users) == users1:
yuan = float(line.split("-")[5])
print("您的⾦额为："+str(yuan))
b = int(input('请输⼊您要转账的银⾏卡号：'))
ist(str(b)) is False:
print("该账号不存在！")
break
j = float(input("输⼊您要转账⾦额："))
yuan = yuan - j
if yuan < 0:
print("卡内余额不⾜")
break
with open("","w+") as f1:
for i in lines:
if str(users) == i.split("-")[0]:
name= i.split("-")[2]
nid = i.split("-")[3]
tel = i.split("-")[4]
bank = str(users) + "-" + password + "-" + name + "-" + nid + "-" + tel + "-" + str(yuan) + "-" + "True" + "\n"
f1.writelines(bank)
continue
if str(b) == i.split("-")[0]:
password1 = i.split("-")[1]
name1= i.split("-")[2]
nid1 = i.split("-")[3]
tel1 = i.split("-")[4]
qian = i.split("-")[5]
total = float(qian) + j
bank1 = str(b) + "-" + password1 + "-" + name1 + "-" + nid1 + "-" + tel1 + "-" + str(total)+ "-" + "True" + "\n"
f1.writelines(bank1)
continue
f1.write(i)
print("已完成此次交易")
else:
print("账号已被锁定!⽆法进⾏转账")
def suoding(self):#锁定
users = int(input("请输⼊要锁定的账号："))
flag = True
while flag:
ist(str(users)) is True:
flag = False
ist(str(users)) is False:#判断账号是否存在
users = int(input("账号不存在，请重新输⼊要锁定的账号："))
with open("","r") as f:
lines = f.readlines()
with open("","w+") as f1:
for line in lines:
if str(users) == line.split("-")[0]:
password1 = line.split("-")[1]
tel1 = line.split("-")[4]
qian = line.split("-")[5]
t = "False\n"
bank2 = str(users) + "-" + password1 + "-" + name1 + "-" + nid1 + "-" + tel1 + "-" + qian+ "-" + t                        f1.writelines(bank2)
continue
f1.write(line)
print("此账号已被封锁")
def jiesuo(self):
users = int(input("请输⼊要解锁的账号："))
flag = True
while flag:
ist(str(users)) is True:
flag = False
ist(str(users)) is False:#判断账号是否存在
users = int(input("账号不存在，请重新输⼊要解锁的账号："))
with open("","r") as f:
lines = f.readlines()
with open("","w+") as f1:
for line in lines:
if str(users) == line.split("-")[0]:
password1 = line.split("-")[1]
name1= line.split("-")[2]
nid1 = line.split("-")[3]
tel1 = line.split("-")[4]
qian = line.split("-")[5]
t = "True\n"
bank2 = str(users) + "-" + password1 + "-" + name1 + "-" + nid1 + "-" + tel1 + "-" + qian+ "-" + t                        f1.writelines(bank2)
continue
f1.write(line)
print("此账号已被解锁")
@staticmethod
def exist(users):#判断账号是否重复及存在
flag = False
with open("","r") as f:
lines = f.readlines()
for line in lines:
if users in line:
flag = True
break
return flag

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