added new file with examples of using the set data type/object

python_3_oop/chapter06/sets.py

@@ -0,0 +1,39 @@
+song_library = [("Phantom of the opera", "Sarah Brightman"),
+                ("Knocking on heaven's door", "Guns N' Roses"),
+                ("Captain Nemo", "Sarah Brightman"),
+                ("Patterns in the ivy", "Opeth"),
+                ("November rain", "Guns N' Roses"),
+                ("Beautiful", "Sarah Brightman"),
+                ("Mal's song", "Vixy and Tony")]
+
+artists = set()
+
+for song, artist in song_library:
+    artists.add(artist)
+
+print(artists)
+
+for artist in artists:
+    print("{} plays good music".format(artist))
+
+alpabetical = list(artists)
+alpabetical.sort()
+print(alpabetical)
+
+my_artists = artists
+auburns_artists = {"Nickelback", "Guns N' Roses", "Savage Garden"}
+
+print("All: {}".format(my_artists.union(auburns_artists)))
+print("Both: {}".format(my_artists.intersection(auburns_artists)))
+print("Either but not both: {}".format(my_artists.symmetric_difference(auburns_artists)))
+
+bands = {"Guns N' Roses", "Opeth"}
+
+print("my_artists is to bands:")
+print("issuperset: {}".format(my_artists.issuperset(bands)))
+print("issubset: {}".format(my_artists.issubset(bands)))
+print("difference: {}".format(my_artists.difference(bands)))
+print("*" * 20)
+print("issuperset: {}".format(bands.issuperset(my_artists)))
+print("issubset: {}".format(bands.issubset(my_artists)))
+print("difference: {}".format(bands.difference(my_artists)))