add dataclasses exercise

Author: ebrahimbeiati

sprint-5/dataclasses_exercise.py

@@ -0,0 +1,25 @@
+from dataclasses import dataclass
+from datetime import date
+# exercise
+# Write a Person class using @datatype which uses a datetime.date for date of birth, rather than an int for age.
+# Re-add the is_adult method to it.
+
+
+@dataclass(frozen=True)
+class Person:
+    name: str
+    date_of_birth: date
+    preferred_operating_system: str
+
+    def is_adult(self) -> bool:
+        today = date.today()
+        age = today.year - self.date_of_birth.year
+
+        if(today.month, today.day) < (self.date_of_birth.month, self.date_of_birth.day):
+            age -= 1    
+        return age >= 18
+
+imran = Person("Imran", date(2000, 1, 1), "Ubuntu")
+imran2 = Person("Imran", date(2000, 1, 1), "Ubuntu")
+print(imran.is_adult())
+print(imran == imran2) # True, because dataclasses automatically generate an __eq__ method that compares the fields of the dataclass.