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  1. music = { 
  2. 	"Band 1": {
  3. 		"Album A": ["1-Track A1", "1-Track A2", "1-Track A3"],
  4. 		"Album B": ["1-Track B1", "1-Track B2", "1-Track B3"],
  5. 		"Album C": ["1-Track C1", "1-Track C2", "1-Track C3"]
  6. 	},
  7. 	"Band 2": {
  8. 		"Album A": ["2-Track A1", "2-Track A2", "2-Track A3"],
  9. 		"Album B": ["2-Track B1", "2-Track B2", "2-Track B3"],
  10. 		"Album C": ["2-Track C1", "2-Track C2", "2-Track C3"]
  11. 	},
  12. 	"Band 3": {
  13. 		"Album A": ["3-Track A1", "3-Track A2", "3-Track A3"],
  14. 		"Album B": ["3-Track B1", "3-Track B2", "3-Track B3"],
  15. 		"Album C": ["3-Track C1", "3-Track C2", "3-Track C3"]
  16. 	}
  17. }
  18.  
  19. import random
  20. def pick_track(music_collection):
  21. 	# we must pick a key and look that up if we get a dictionary
  22. 	if isinstance(music_collection, dict):
  23. 		chosen = music_collection[random.choice(list(music_collection.keys()))]
  24. 	else:
  25. 		chosen = random.choice(music_collection)
  26.  
  27. 	if isinstance(chosen, str):  # it's a string, so it represents a track
  28. 		return chosen
  29. 	else:  # it's a collection (list or dict) so we have to pick something from inside it
  30. 		return pick_track(chosen)
  31.  
  32.  
  33. def pick_track2(music_collection):
  34. 	if isinstance(music_collection, dict):
  35. 		random_key = random.choice(list(music_collection.keys()))
  36. 	else:
  37. 		random_key = random.randrange(len(music_collection))
  38. 	chosen = music_collection[random_key]
  39. 	if isinstance(chosen, str): 
  40. 		return [random_key, chosen]
  41. 	else:
  42. 		return [random_key] + pick_track2(chosen)
  43.  
  44. for i in range(5):
  45. 	print(pick_track(music))
  46.  
  47. for i in range(5):
  48. 	print("Band: '{}' - Album: '{}' - Track {}: '{}'".format(*pick_track2(music)))
  49.  
Success #stdin #stdout 0.03s 12360KB
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stdin
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Standard input is empty
stdout
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1-Track B1
3-Track B2
3-Track C2
3-Track A1
2-Track A3
Band: 'Band 1' - Album: 'Album C' - Track 1: '1-Track C2'
Band: 'Band 2' - Album: 'Album B' - Track 0: '2-Track B1'
Band: 'Band 1' - Album: 'Album B' - Track 0: '1-Track B1'
Band: 'Band 3' - Album: 'Album B' - Track 2: '3-Track B3'
Band: 'Band 3' - Album: 'Album B' - Track 2: '3-Track B3'
https://ideone.com/pApMkl
language:
Python 3 (python  3.9.5)
created:
8 years ago
visibility:
public

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