diff --git a/python-set/difference_update.py b/python-set/difference_update.py
index 400afbe4df..86f086b837 100644
--- a/python-set/difference_update.py
+++ b/python-set/difference_update.py
@@ -6,4 +6,4 @@
 }
 completed_tasks = {"Fix bug #123", "Improve performance"}
 todo_list.difference_update(completed_tasks)
-todo_list
+print(todo_list)
diff --git a/python-set/pop.py b/python-set/pop.py
index d100ded4bb..0faff8f1bd 100644
--- a/python-set/pop.py
+++ b/python-set/pop.py
@@ -1,6 +1,6 @@
 employees = {"Alice", "Charlie", "John", "Laura"}
 print(employees.pop())
 print(employees.pop())
-employees.pop()
-employees.pop()
+print(employees.pop())
+print(employees.pop())
 employees.pop()
diff --git a/python-set/superset.py b/python-set/superset.py
index af938b966c..89b337b4c5 100644
--- a/python-set/superset.py
+++ b/python-set/superset.py
@@ -2,7 +2,7 @@
 available_ingredients = {"cheese", "eggs", "milk", "sugar", "salt"}
 
 print(available_ingredients >= required_ingredients)
-print(available_ingredients.issubset(required_ingredients))
+print(available_ingredients.issuperset(required_ingredients))
 
 a = {1, 2, 3, 4, 5}
 print(a.issuperset(a))
diff --git a/python-set/union.py b/python-set/union.py
index a6f2671fea..846665d2ab 100644
--- a/python-set/union.py
+++ b/python-set/union.py
@@ -8,5 +8,5 @@
 b = {2, 3, 4, 5}
 c = {3, 4, 5, 6}
 d = {4, 5, 6, 7}
-a.union(b, c, d)
+print(a.union(b, c, d))
 print(a | b | c | d)