我在刷题的时候,想要将字母对应的坐标[i, j ]保存在对应字母的键值里,但是返回一直出错,没搞懂原因,希望大佬解答
word = "ABCCED"
board =[['A','B','C','E'],['S','F','C','S'],['A','D','E','E']]
dic = dict.fromkeys(set(word),[])
for i in range(len(board)):
for j in range(len(board[0])):
print(board[i][j])
if board[i][j] in word:
dic[board[i][j]].append([i,j])
输出是:
这个错误的输出中,每次添加的坐标数组都被添加在了所有key下面。