Change the Person class to take a date of birth

Author: shreefAhmedM

sprint5-prep-exercises/accessNotExiProp.py

@@ -0,0 +1,11 @@
+class Person:
+    def __init__(self, name: str):
+        self.name = name
+
+def get_name(person: Person) -> str:
+    return person.name
+
+def get_age(person: Person) -> int:
+    return person.age
+# As I expected, mypy prints an error saying that Person has no attribute name,
+#  because the age property does not exist in the Person class.

sprint5-prep-exercises/classesAndObjects.py

@@ -10,4 +10,8 @@ def __init__(self, name: str, age: int, preferred_operating_system: str):
 
 eliza = Person("Eliza", 34, "Arch Linux")
 print(eliza.name)
-print(eliza.address)
+print(eliza.address)
+
+
+# The error means that address doesn't exist in the Person class. We can only 
+# access attributes that were defined in the class, such as name, age, and preferred_operating_system.

sprint5-prep-exercises/methods.py

@@ -0,0 +1,23 @@
+import datetime as dt
+from dataclasses import dataclass
+
+
+@dataclass
+class Person:
+    name: str
+    birthdate: dt.date
+    preferred_operating_system: str
+
+    def is_adult(self) -> bool:
+        today = dt.date.today()
+        age = today.year - self.birthdate.year
+
+        if (today.month, today.day) < (self.birthdate.month, self.birthdate.day):
+            age -= 1
+
+        return age >= 18
+
+
+imran = Person("Imran", dt.date(2000, 8, 6), "Ubuntu")
+
+print(imran.is_adult())

sprint5-prep-exercises/typeAnnotations.py

@@ -32,4 +32,8 @@ def format_pence_as_string(total_pence: int) -> str:
 total_pence = sum_balances(balances)
 total_string = format_pence_as_string(total_pence)
 
-print(f"The bank accounts total {total_string}")
+print(f"The bank accounts total {total_string}")
+def is_adult(person: Person) -> bool:
+    return person.age >= 18
+
+print(is_adult(imran))