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  1. from collections import defaultdict
  2.  
  3. data = [2,1,2,4,5,5,6,4]
  4. map = defaultdict(list)
  5. for index, number in enumerate(data):
  6. 	map[number].append(index)
  7.  
  8. for number, positions in map.items():
  9. 	print(number, positions)
Success #stdin #stdout 0.03s 10192KB
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Standard input is empty
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1 [1]
2 [0, 2]
4 [3, 7]
5 [4, 5]
6 [6]
https://ideone.com/iOR6mp
language:
Python 3 (python  3.9.5)
created:
8 years ago
visibility:
public

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