python - 当我调用我的函数时循环没有结束

Question

我正在尝试从用户那里获取输入，但是 while 循环一直在无休止地进行。这是我的代码：

def player_Input():
    marker=""
    while marker != "X" or marker !="O":
        marker = input("Player-1: Please Choose X or O: ").upper()
    if marker == "X":
        print("X","O")
    else:
        print("O","X")

当我调用这个函数时，输入并没有结束，而是一直在继续

标签： pythonpython-3.xwhile-loop

Answer 1

更改or为and在while循环中：

def player_Input():
    marker=""
    while marker != "X" and marker !="O":
        marker = input("Player-1: Please Choose X or O: ").upper()
    if marker == "X":
        print("X","O")
    else:
        print("O","X")