# 1 line in Python

• ``````class Solution(object):
def rotate(self, matrix):
"""
:type matrix: List[List[int]]
:rtype: void Do not return anything, modify matrix in-place instead.
"""
matrix[::] = zip(*matrix[::-1])``````

• 38 ms, easy to understand, first transpose, then flip horizontally

``````class Solution(object):
def rotate(self, matrix):
n = len(matrix)
# transpose
for i in range(n):
for j in range(i + 1, n):
tmp = matrix[i][j]
matrix[i][j] = matrix[j][i]
matrix[j][i] = tmp
# flip horizontally
for i in range(n):
for j in range(n/2):
tmp = matrix[i][j]
matrix[i][j] = matrix[i][n - 1 - j]
matrix[i][n - 1- j] = tmp
``````

• my solution:

``````def rotate(self, matrix):
"""
:type matrix: List[List[int]]
:rtype: void Do not return anything, modify matrix in-place instead.
"""
length = len(matrix)
for i in range(int(length/2)):
count = 0
for j in range(i,length-1-i):

matrix[i][j], matrix[i+count][length-i-1], matrix[length-i-1][length-j-1], matrix[length-j-1][i] = \
matrix[length-j-1][i], matrix[i][j], matrix[i+count][length-i-1], matrix[length-i-1][length-j-1]

count += 1
``````

• @leetcoder07 said in 1 line in Python:

matrix[::] = zip(*matrix[::-1])

I wonder if it meets the question. Because it changes list[list,list,...] to list[tuple,tuple,...]

• @leetcoder07
it gives this error:
Do not return anything, modify matrix in-place instead.

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