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  1. l= [[1,11],[2,22],[3,33],[4,44]]
  2. resultado = []
  3.  
  4. for e in l:
  5. resultado.append([e[1], e[0]])
  6.  
  7. print(resultado)
Success #stdin #stdout 0.04s 9496KB
stdin
Standard input is empty
stdout
[[11, 1], [22, 2], [33, 3], [44, 4]]