Xeno

def main():
    print("welcome to Wasteful's blackjack game") 
    print("this program was built using standard python")
    print("please select a option") 
    print("A to start, B to quit")
    print("----------------------------")
    menu_select = input("A/B: ").lower()

    if (menu_select == "a"):
        print("starting game when i can be assed to program it") 

    elif (menu_select == "b"):
        exit() 

    else: 
        print("invalid")

main()

首先,正如Rassar所说,在从用户获得输入后,必须调用.lower()。 接下来,我总是发现创建一个主循环函数来调用所有未来的函数并保持代码整洁更容易!希望这有点帮助! 快乐编码!:)