python - 将用户输入更改为小写的代码

Question

有一段代码可以将用户输入的任何内容更改为小写，我如何将其实现到我的代码中而不是使用[“a”或“A”]？

def displaymenu():
    print("Weather station")
    print("Please enter the option you would like")
    optionchoice = input("Please enter A,B,C or D:")

    if optionchoice in ["a" or "A"]:
        print("The temperature will be displayed")
        time.sleep(1)
        optionA()

    elif optionchoice in ["b" or "B"]:
        print("The wind speed will be displayed")
        time.sleep(1)
        optionB()

    elif optionchoice in ["c" or "C"]:
        print("The day and time will be displayed")
        time.sleep(1)
        optionC()

    elif optionchoice in ["d" or "D"]:
        print("The Location will be displayed")
        time.sleep(1)
        optionD()

    else:
        print("Please type a valid input")
        displaymenu()

Answer 1

尝试这样的事情:

optionchoice = input("请输入A、B、C或D:").lower()

这样，您就可以强制输入用户输入的任何内容的小写版本。