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  1. def flatten_list(ls=[]):
  2.     flattened_list = []
  3.  
  4.     def aux(ls):
  5.         for elem in ls:
  6.             if not isinstance(elem, list):
  7.                 print("ADDING NO-LIST ELEMENT...")
  8.                 flattened_list.append(elem)
  9.             else:
  10.                 print("RECURSION...")
  11.                 aux(elem)
  12.  
  13.     aux(ls)
  14.  
  15.     return flattened_list
  16.  
  17.  
  18.  
  19. print(flatten_list([[1,2,3,[4,5]],[6,7,8,9],10]))
Success #stdin #stdout 0.03s 9440KB
comments (?)
stdin 
1
2
10
42
11
stdout 
RECURSION...
ADDING NO-LIST ELEMENT...
ADDING NO-LIST ELEMENT...
ADDING NO-LIST ELEMENT...
RECURSION...
ADDING NO-LIST ELEMENT...
ADDING NO-LIST ELEMENT...
RECURSION...
ADDING NO-LIST ELEMENT...
ADDING NO-LIST ELEMENT...
ADDING NO-LIST ELEMENT...
ADDING NO-LIST ELEMENT...
ADDING NO-LIST ELEMENT...
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
https://ideone.com/tArs2R
language:
Python 3 (python  3.9.5)
created:
10 years ago
visibility:
secret

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