python中上三角矩阵元素的检查

Question

这是我的审判，但它没有涵盖一切，也在重复，我做错了什么？

for i in range(len(m)):
    for j in range(len(m)):
  words_length = len(words)

                if (m[i][j] == '' and i == j) or (m[i][j] == '' and i== j-3):

                           print ("["),
                           print (i+1),
                           print (","),
                           print (j+1),
                           print ("]"),
                           print(":"),
                           print("-")
                for s in range(0,words_length-1):

                          if ((m[i][j] == '' and i== s and  j == i+1 )  or (m[i][j] == '' and i== 0  and  j== words_length-1)):

                           print ("["),
                           print (i+1),
                           print (","),
                           print (j+1),
                           print ("]"),
                           print(":"),
                           print("-")

                for r in range(0,words_length-3):

                          if (m[i][j] == '' and i==r and  j== i+2 ):
                           print ("chart"),
                           print ("["),
                           print (i+1),
                           print (","),
                           print (j+1),
                           print ("]"),
                           print(":"),
                           print("-")

Answer 1

我想我明白了，只需添加whenj>I