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  1. list_of_sublists = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
  2. print([item for sublist in list_of_sublists for item in sublist])
Success #stdin #stdout 0.02s 6828KB
stdin
Standard input is empty
stdout
[1, 2, 3, 4, 5, 6, 7, 8, 9]