🏣 Clean up for arxiv

book/ebook_src/python_examples/example_sets.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python
+
+__author__ = "bt3"
+
+def difference(l1):
+    """ return the list with duplicate elements removed """
+    return list(set(l1))
+
+def intersection(l1, l2):
+    """ return the intersection of two lists """
+    return list(set(l1) & set(l2))
+
+def union(l1, l2):
+    """ return the union of two lists """
+    return list(set(l1) | set(l2))
+
+
+def test_sets_operations_with_lists():
+    l1 = [1,2,3,4,5,9,11,15]
+    l2 = [4,5,6,7,8]
+    l3 = []
+    assert(difference(l1) == [1, 2, 3, 4, 5, 9, 11, 15])
+    assert(difference(l2) == [8, 4, 5, 6, 7])
+    assert(intersection(l1, l2) == [4,5])
+    assert(union(l1, l2) == [1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 15])
+    assert(difference(l3) == [])
+    assert(intersection(l3, l2) == l3)
+    assert(sorted(union(l3, l2)) == sorted(l2))
+    print('Tests passed!')
+
+
+if __name__ == '__main__':
+    test_sets_operations_with_lists()
+
+
+
+