列表未在类中更新（python 3）

Question

self.cell 没有更新..

当我在cell_in 中输入值时，update_cell 方法不会列出单元格。 并返回['-','-','-','-','-','-','-','-','-']

class board():
    def __init__(self):
        self.cell=['-','-','-','-','-','-','-','-','-']

    def display(self):
        x=0
        c= self.cell
        for i in range(0,3):
            for j in range(0,3):
                if(j is 0):
                    print(' ',end='')
                print(c[x],end='')
                x+=1
                if(j<2):
                    print(' | ',end='')
            if(i<2):
                print('\n-----------')
        print()



    def update_cell(self,cell_in,player):
        self.cell[(cell_in-1)]= player
def header():
    print("-TicTacToe-")

def ref_scr():
    cls()
    header()
    board().display()
while True:
    ref_scr()
    cell_in = int(input("enter cell between 1 and 9: "))
    player= 'X'
    board().update_cell(cell_in,player)

Answer 1

board() 每次都会创建一个新的板子实例。用brd = board()创建一个board实例，并用它来调用brd.update_cell()和brd.display()。

Answer 2

它应该是这样的。这会阻止代码在每个循环中初始化一个新的板对象。

def ref_scr(brd):
    cls()  # Not sure what this is. It doesn't appear anywhere else.
    header()
    brd.display()

if __name__ == "__main__":
    brd = Board()
    while True:
        ref_scr(brd)
        cell_in = int(input("enter cell between 1 and 9: "))
        player = 'X'
        brd.update_cell(cell_in, player)

编辑： 继续并更改了 ref_scr 函数。现在应该可以了。