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  1. def flatten(lst):
  2.  return sum( ([x] if not isinstance(x, list) else flatten(x)
  3.  for x in lst), [] )
  4.  
  5. lst = [[1], 2, [[3,4], 5], [[[]]], [[[6]]], 7, 8, []]
  6. print flatten(lst)
Success #stdin #stdout 0.01s 8968KB
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Standard input is empty
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[1, 2, 3, 4, 5, 6, 7, 8]
https://ideone.com/8lnYGB
language:
Python (cpython 2.7.16)
created:
7 years ago
visibility:
public

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