python 實現銀行管理系統，供大家參考，具體內容如下

有的地方用的方法的比較復雜，主要是為回顧更多的知識

test1用來存類和函數

#test1.py import random  #用來隨機產生卡號import pickle #序列化，用來存放和取出產生的用戶數據import os  #產生文件import re  #正則表達式，用來判斷身份證和手機號，其他地方也可以使用class Card: def __init__(self,cardId,password,money=0): self.cardId=cardId self.password=password self.money=moneyclass User(Card): def __init__(self,username,phone,uid,card): self.username=username self.phone=phone self.uid=uid self.user_card=card #User繼承Card對象class Bank(User):  #Bank 繼承User，Bank是序列化的對象，所以將其變為字典 def __init__(self,user): self.cardId=user.user_card.cardId  self.user=user    self.users={self.cardId:self.user} #鍵，卡號 ：值，User對象 def generate_cardid(): #方法一 產生卡號 list=[] for i in range(0,11): n=random.randint(0,9) n=str(n) list.append(n) # str="".join(list) return list# generate_cardid()# user_cardId=input("請輸入您的賬號：")def create_user():  #方法2:開戶 while True: uid=input("請輸入身份證:") realut=re.fullmatch("/d{17}[/d,X]",uid) #正則判斷身份證是否合理 if realut:  uid=realut.group()  break else:  print("格式不合法")  continue username=input("請輸入姓名:") while True: phone=input("請輸入手機號碼:") realut = re.fullmatch("1/d{10}", phone) #正則判斷手機號是否合理，其他需要判斷的地方都可以判斷，我就不再使用了 if realut:  phone=realut.group()  # print(phone)  break else:  print("格式不合法")  continue list=generate_cardid() #得到卡號列表 cardId="".join(list) #將卡號變成字符串，字符串的卡號才能做成鍵 print(f"您的卡號為：{cardId}") while True: password1=input("請輸入密碼:") password2=input("再次輸入密碼確認:") if password1==password2:  password=password1  break else :  print("兩次密碼不同，請重新輸入！")  continue card=Card(cardId,password)  user=User(uid,username,phone,card) bank=Bank(user) #產生bank對象 with open(f"data//{cardId}.txt","ab") as file_w: #重點：創建一個文件夾data來存放產生的bank對象，每個對象根據卡號產生一個txt文件，用來存放用戶的所有數據 pickle.dump(bank,file_w) #將bank 序列化保存到文檔中# create_user()def user_login(user_cardId): #登錄 if os.path.exists(f"data//{user_cardId}.txt"): with open(f"data//{user_cardId}.txt", "rb") as file_r:  u_data = pickle.load(file_r) #根據卡號取出txt文檔，反序列化取出數據  if u_data.cardId == user_cardId: #u_data是一個字典，鍵是卡號，值是user對象   n = 1  while True:   if n <= 3:   user_pw = input("請輸入密碼:")   if u_data.user.user_card.password == user_pw:    return True   else:    print("密碼錯誤！")    n+=1    continue   else:   print("三次輸入密碼錯誤！")   return else: print("沒有該用戶")# user_login(user_cardId)def save_money(user_cardId): # 方法4:存錢 if user_login(user_cardId): #如果登錄成功 money=int(input("請您輸入存錢金額：")) with open(f"data//{user_cardId}.txt", "rb") as file_r:  u_data = pickle.load(file_r)  u_data.user.user_card.money=u_data.user.user_card.money+money  print("您的余額為:",u_data.user.user_card.money)  with open(f"data//{user_cardId}.txt", "wb") as file_w: #這里要用wb,而不是ab,改變數據后，需要覆蓋原來的數據，而不是添加  pickle.dump(u_data, file_w)# save_money()def withdraw_money(user_cardId): # 方法5:取錢 if user_login(user_cardId): money=int(input("請您輸入取款金額：")) with open(f"data//{user_cardId}.txt", "rb") as file_r:  u_data = pickle.load(file_r)  if money>u_data.user.user_card.money:  print("余額不足")  else:  u_data.user.user_card.money=u_data.user.user_card.money-money  print("您的余額為:", u_data.user.user_card.money)  with open(f"data//{user_cardId}.txt", "wb") as file_w:   pickle.dump(u_data, file_w)# withdraw_money()def transfer_accounts(user_cardId): #方法6，轉賬 if user_login(user_cardId): with open(f"data//{user_cardId}.txt", "rb") as file_r:  u_data = pickle.load(file_r)  while True:  money = int(input("請您轉賬取款金額："))  if money > u_data.user.user_card.money:   print("余額不足")   break  else:   cardId=int(input("請您對方卡號："))   if os.path.exists(f"data//{cardId}.txt"): #如果對方卡號存在   u_data.user.user_card.money = u_data.user.user_card.money - money #自己的money減   print("您的余額為:", u_data.user.user_card.money)   with open(f"data//{user_cardId}.txt", "wb") as file_w:    pickle.dump(u_data, file_w)   with open(f"data//{cardId}.txt", "rb") as file_r1: #根據對方的卡號進行查找對方的數據    u_data1 = pickle.load(file_r1)    with open(f"data//{cardId}.txt", "wb") as file_w1:    u_data1.user.user_card.money = u_data1.user.user_card.money + money #對方money加    pickle.dump(u_data1, file_w1)    print("轉賬成功")    break   else:   print("該用戶不存在")   break# transfer_accounts()def select_user(user_cardId): # 方法7:查詢余額 if user_login(user_cardId): with open(f"data//{user_cardId}.txt", "rb") as file_r:  u_data = pickle.load(file_r)  print("您的余額為：",u_data.user.user_card.money)# select_user()def update_password(user_cardId): # 方法8:修改密碼 if user_login(user_cardId): while True:  pw1=input("請輸入新密碼:")  pw2=input("請再次輸入密碼:")  if pw1==pw2:  with open(f"data//{user_cardId}.txt", "rb") as file_r:   u_data = pickle.load(file_r)   u_data.user.user_card.password=pw1  with open(f"data//{user_cardId}.txt", "wb") as file_w:   pickle.dump(u_data, file_w)   break  else:  print("兩次密碼不相同")  continue