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  1. a = [
  2.   [1,2,3,4,5,6,7,8,9],
  3.   [1,2,3,4,5,6,7,8,9],
  4.   [1,2,3,4,5,6,7,8,9],
  5.   [1,2,3,4,5,6,7,8,9],
  6.   [1,2,3,4,5,6,7,8,9],
  7.   [1,2,3,4,5,6,7,8,9],
  8.   [1,2,3,4,5,6,7,8,9],
  9.   [1,2,3,4,5,6,7,8,9],
  10.   [1,2,3,4,5,6,7,8,9]
  11. ]
  12.  
  13. b = [[x for r in a[i:i+3] for x in r[j:j+3]] for j in range(0,9,3) for i in range(0,9,3)]
  14.  
  15. print(b)
Success #stdin #stdout 0.02s 9316KB
comments (?)
stdin 
Standard input is empty
stdout 
[[1, 2, 3, 1, 2, 3, 1, 2, 3], [1, 2, 3, 1, 2, 3, 1, 2, 3], [1, 2, 3, 1, 2, 3, 1, 2, 3], [4, 5, 6, 4, 5, 6, 4, 5, 6], [4, 5, 6, 4, 5, 6, 4, 5, 6], [4, 5, 6, 4, 5, 6, 4, 5, 6], [7, 8, 9, 7, 8, 9, 7, 8, 9], [7, 8, 9, 7, 8, 9, 7, 8, 9], [7, 8, 9, 7, 8, 9, 7, 8, 9]]
https://ideone.com/PALFZb
language:
Python 3 (python  3.12)
created:
6 years ago
visibility:
public

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