leetcode 766. 托普利茨矩阵

class Solution:
def isToeplitzMatrix(self, matrix):
"""
:type matrix: List[List[int]]
:rtype: bool
"""
m=len(matrix)
n=len(matrix[0])
for i in range(m):
data=matrix[i][0]
j=0
while i<m and j<n:
if matrix[i][j] is not data:
return False
i+=1
j+=1
for j in range(n):
data=matrix[0][j]
i=0
while i<m and j<n:
if matrix[i][j] is not data:
return False
i+=1
j+=1
return True