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  1. import sys
  2. from collections import defaultdict
  3.  
  4. d = defaultdict(list)
  5. for line in sys.stdin:
  6.      if line.strip(): # skip blank lines
  7.         person, wine = line.split()
  8.         d[wine].append(person)
  9.  
  10. from pprint import pprint
  11. pprint(dict(d))
Success #stdin #stdout 0.09s 8840KB
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stdin
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person1 wine2

person1 wine1

person2 wine1

person2 wine2

person2 wine3

person2 wine4

person2 wine5
stdout
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{'wine1': ['person1', 'person2'],
 'wine2': ['person1', 'person2'],
 'wine3': ['person2'],
 'wine4': ['person2'],
 'wine5': ['person2']}
https://ideone.com/4o9ygv
language:
Python (cpython 2.7.16)
created:
11 years ago
visibility:
secret

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