exercise 5 completed

Author: Alex-Jamshidi

Sprint 5 Prep Exercises/exercise_4.py

@@ -0,0 +1,35 @@
+class Person:
+    def __init__(self, name: str, age: int, preferred_operating_system: str):
+        self.name = name
+        self.age = age
+        self.preferred_operating_system = preferred_operating_system
+
+imran = Person("Imran", 22, "Ubuntu")
+print(imran.name)
+print(imran.address)
+
+eliza = Person("Eliza", 34, "Arch Linux")
+print(eliza.name)
+print(eliza.address)
+
+# exercise_4_and_5.py:9: error: "Person" has no attribute "address"  [attr-defined]
+# exercise_4_and_5.py:13: error: "Person" has no attribute "address"  [attr-defined]
+# Found 2 errors in 1 file (checked 1 source file)
+
+# There is no address attribute for a Person, only name, age and preferred operating system.
+
+# Add the is_adult code to the file you saved earlier.
+def is_adult(person: Person) -> bool:
+    return person.age >= 18
+
+print(is_adult(imran))
+
+# Run it through mypy - notice that no errors are reported - 
+# mypy understands that Person has a property named age so is happy with the function.
+
+def is_banana(person: Person) -> bool:
+    return person.banana
+
+print(is_banana(imran))
+
+# exercise_4_and_5.py:31: error: "Person" has no attribute "banana"  [attr-defined]