feat: Added .venv to gitignore file, and finished the exercise one.

Author: jamallaqdiem

.gitignore

@@ -1 +1,2 @@
 node_modules
+.venv

prep-exercises/classes_objects.py

@@ -0,0 +1,22 @@
+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) # Person class do not have address attribute.
+
+eliza = Person("Eliza", 34, "Arch Linux")
+print(eliza.name)
+#print(eliza.address) # again here Person class do not have address attribute.
+
+def is_adult(person: Person) -> bool:
+    return person.age >= 18
+
+print(is_adult(imran))
+
+# This method will crash the program as there is no occupation attribute in the Person class
+#def is_student(person: Person) -> bool:
+#    return person.occupation =="Software Engineer"