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  1. facts = [
  2.  ('croaks','frogs'),('eats flies','frogs'),
  3.  ('frogs', 'green'),('chirp', 'canary'),
  4.  ('sing', 'canary'),('canary', 'yellow')
  5. ]
  6. def check(knowns, facts):
  7.     result = []
  8.     for known in knowns:
  9.         for A, B in facts:
  10.             if known == B and (A, B) not in result:
  11.                 result.append((A, B))
  12.                 knowns.append(A)
  13.     return result
  14. print("Result :", check(['frogs'], facts))
  15.  
Success #stdin #stdout 0.02s 9060KB
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Standard input is empty
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Result : [('croaks', 'frogs'), ('eats flies', 'frogs')]
https://ideone.com/365LQh
language:
Python 3 (python  3.9.5)
created:
1 year ago
visibility:
public

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