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  1. arr = input().split()
  2. res = {}
  3.  
  4. for item in arr:
  5.     key, value = item.split(":")
  6.     res.setdefault(key, []).append(value)
  7.  
  8. print(res)
Success #stdin #stdout 0.08s 14084KB
comments (?)
stdin 
a:1 b:2 a:3
stdout 
{'a': ['1', '3'], 'b': ['2']}
https://ideone.com/Qe6DbO
language:
Python 3 (python  3.12)
created:
1 day ago
visibility:
public

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