學(xué)了幾周的 Python，今天參考老師的教程，成功做出一個(gè)簡(jiǎn)單的“銀行存取款系統(tǒng)”，算是一個(gè)小小的里程碑，很有成就感，以下是代碼：

balance = 1000
account_log = []

def valideate(func):
    def wrapper(*args,**kwargs):
        amount = str(args[0])
        index = amount.index(".")
        if len(amount) - index - 1 > 1:
            print("輸入格式有誤，小數(shù)點(diǎn)最多保留兩位")
        else:
             func(*args,**kwargs)
    return wrapper

@valideate
def deposit(amount):
    """
    存款操作
    :param amount:存入金額
    :return:None
    """
    global balance
    balance += amount
    write_log(amount,"存入")

@valideate
def withdrawal(amount):
    """
    取款
    :param amount: 金額
    :return: None
    """
    global balance
    if amount > balance:
        print("余額不足")
    else:
        balance -= amount
    write_log(amount,"取出")

def write_log(amount,type):
    """
    寫(xiě)入日志
    :param amount: 金額
    :param type: 存入或取出
    :return:None
    """
    now = datetime.datetime.now()
    create_time = now.strftime("%Y-%m-%d %M:%H:%S")
    data = [create_time,type,amount,f"{balance:.2f}"]
    account_log.append(data)


def print_log():
    """
    查看流水
    :return:None
    """
    print(account_log)

def show_menu():
    menu = """
操作菜單：
0：退出；
1:存款；
2：取款；
3：查看記錄；
    """
    print(menu)

while True:
    show_menu()
    num = int(input("請(qǐng)根據(jù)菜單編號(hào)輸入："))
    if num == 0:
        print("你已退出系統(tǒng)")
        break
    elif num == 1:
        print("存款")
        amount = float(input("請(qǐng)輸入存款金額:"))
        deposit(amount)
        print(f"當(dāng)前余額是{balance:.2f}")

    elif num == 2:
        print("取款")
        amount = float(input("請(qǐng)輸入取款金額:"))
        withdrawal(amount)
        print(f"當(dāng)前余額是{balance:.2f}")

    elif num == 3:
        print("查看記錄")
        print_log()
    else:
        print("輸入有誤")

以下是輸出結(jié)果：

圖片.png

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