classes and objects task

Author: ebrahimbeiati

sprint-5/classes_and_objects.py

@@ -0,0 +1,32 @@
+# Exercise 1 — Save the above code to a file, and run it through mypy.
+#Read the error, and make sure you understand what it’s telling you.
+
+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) # mypy error: "Person" has no attribute "address"
+
+eliza = Person("Eliza", 34, "Arch Linux")
+print(eliza.name)
+print(eliza.address) # mypy error: "Person" has no attribute "address"
+
+# Exercise 2 — Add the is_adult code to the file you saved earlier.
+
+# 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.
+
+# Write a new function in the file that accepts a Person as a 
+# parameter and tries to access a property that doesn’t exist. Run it through mypy and check that it does report an error.
+def is_adult(person: Person) -> bool:
+    return person.age >= 18
+
+print(is_adult(imran)) # True
+
+def get_favorite_food(person: Person) -> str:
+    return person.favorite_food # mypy error: "Person" has no attribute "favorite_food"
+