exercise 10 completed

Author: Alex-Jamshidi

Sprint 5 Prep Exercises/account.py

@@ -39,4 +39,21 @@ def find_possible_laptops(laptops: List[Laptop], person: Person) -> List[Laptop]
 
 for person in people:
     possible_laptops = find_possible_laptops(laptops, person)
-    print(f"Possible laptops for {person.name}: {possible_laptops}")
+    print(f"Possible laptops for {person.name}: {possible_laptops}")
+
+# Try changing the type annotation of Person.preferred_operating_system from str to List[str].
+# Run mypy on the code.
+
+# exercise_10.py:29: error: Argument "preferred_operating_system" to "Person" has incompatible type "str"; expected "list[str]"  [arg-type]
+# exercise_10.py:30: error: Argument "preferred_operating_system" to "Person" has incompatible type "str"; expected "list[str]"  [arg-type]
+
+
+# It tells us different places that our code is now wrong, because we’re passing values of the wrong type.
+# We probably also want to rename our field - lists are plural. Rename the field to preferred_operating_systems.
+# Run mypy again.
+
+# exercise_10.py:23: error: "Person" has no attribute "preferred_operating_system"; maybe "preferred_operating_systems"?  [attr-defined]
+# exercise_10.py:29: error: Unexpected keyword argument "preferred_operating_system" for "Person"; did you mean "preferred_operating_systems"?  [call-arg]
+# exercise_10.py:30: error: Unexpected keyword argument "preferred_operating_system" for "Person"; did you mean "preferred_operating_systems"?  [call-arg]
+
+# Fix all of the places that mypy tells you need changing. Make sure the program works as you’d expect.