class-and-object

Author: delmorallopez

class-and-object.py

@@ -0,0 +1,48 @@
+#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)
+
+
+eliza = Person("Eliza", 34, "Arch Linux")
+print(eliza.name)
+
+def is_adult(person: Person) -> bool:
+    return person.age >= 18
+
+print(is_adult(imran))
+
+
+def address(person: Person) -> str:
+    return person.address
+
+
+#EXERCISE 1:
+#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.
+
+# SOLUTION:
+# After run class-and-object.py, I get the following mypy errors:
+# class-and-object.py:12: error: "Person" has no attribute "address"
+# It indicates that the Person class does not have an attribute named 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.
+# When running mypy, I get the following error:
+# Class-and-object.py:27: error: "Person" has no attribute "address"  [attr-defined]
+# Found 1 error in 1 file (checked 1 source file)
+# This error indicates that the Person class does not have an attribute named address.