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39 lines
1.3 KiB
39 lines
1.3 KiB
song_library = [("Phantom of the opera", "Sarah Brightman"),
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("Knocking on heaven's door", "Guns N' Roses"),
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("Captain Nemo", "Sarah Brightman"),
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("Patterns in the ivy", "Opeth"),
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("November rain", "Guns N' Roses"),
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("Beautiful", "Sarah Brightman"),
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("Mal's song", "Vixy and Tony")]
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artists = set()
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for song, artist in song_library:
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artists.add(artist)
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print(artists)
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for artist in artists:
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print("{} plays good music".format(artist))
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alpabetical = list(artists)
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alpabetical.sort()
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print(alpabetical)
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my_artists = artists
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auburns_artists = {"Nickelback", "Guns N' Roses", "Savage Garden"}
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print("All: {}".format(my_artists.union(auburns_artists)))
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print("Both: {}".format(my_artists.intersection(auburns_artists)))
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print("Either but not both: {}".format(my_artists.symmetric_difference(auburns_artists)))
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bands = {"Guns N' Roses", "Opeth"}
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print("my_artists is to bands:")
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print("issuperset: {}".format(my_artists.issuperset(bands)))
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print("issubset: {}".format(my_artists.issubset(bands)))
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print("difference: {}".format(my_artists.difference(bands)))
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print("*" * 20)
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print("issuperset: {}".format(bands.issuperset(my_artists)))
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print("issubset: {}".format(bands.issubset(my_artists)))
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print("difference: {}".format(bands.difference(my_artists)))
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