如何使用循环完成图中替换？

请问各位怎么可以用for 循环 把列表的字符转化成字典对应的字符呀

试试这样

for i in range(len(key)):
     for j in range(len(key[i])):
        key[i][j] = dic[key[i][j])

    dic={'*':'.','.':'#'}
    key=[['*','*'],['*','.']]
    for list in key:
        for i,v in enumerate(list):
            list[i]=dic[v]
    print(key)