Leetcode-Spiral Matrix II Spiral Matrix 2 python method is good, just get it in four lines. Do you believe it ?, Leetcodepython

Leetcode-Spiral Matrix II Spiral Matrix 2 python method is good, just get it in four lines. Do you believe it ?, Leetcodepython

Spiral Matrix II

 

Spiral Matrix

Given an integer n, generate a square matrix filled with elements from 1 to n2 in spiral order.
For example,
Given n = 3,
You should return the following matrix:
[ [ 1, 2, 3 ], [ 8, 9, 4 ], [ 7, 6, 5 ]]

　

I was dizzy after reading a long story when I encountered this problem during an interview at the blog Park. I ran to the leetcode discussion area. It seems that I am still awesome with python, And you can believe it in four lines ..

| 1 | 2 | 3 |

| 8 | 9 | 4 |

| 7 6 | 5 |

If you do not understand it, the general process is like the above. The same color indicates that the process is executed in the same step.

 

>>> Def generateMatrix (n ):... a, low = [], n * n + 1... while low> 1 :... low, high = low-len (A), low... A = [list (range (low, high)] + list (zip (* A [:-1]) # The python3.3 syntax is different from that of 2.7... print ()... return A...> generateMatrix (1) [[] [[1] [[1]> generateMatrix (2) [[[] [[4] [[3], (4,)] [[1, 2], (4, 3)] [[1, 2], (4, 3)] >>> generateMatrix (3) [[] [9] [[8], (9,)] [6, 7], (9, 8)] [[4, 5], (9, 6), (8, 7)] [[1, 2, 3], (8, 9, 4), (7, 6, 5)] [[1, 2, 3], (8, 9, 4), (7, 6, 5)]