class Person:
    def __init__(self, first_name, phone_number, birthday):
        self.first_name = first_name
        self.phone_number = phone_number
        self.birthday = birthday

    @property
    def csv_dict(self):
        return {
            "Name": self.first_name,
            "Phone": self.phone_number,
            "Birthday": self.birthday,
            }

    @property
    def csv_fieldnames(self):
        return self.csv_dict.keys()

bob = Person("Bob", "1234567890", "1-1-1990")
print(bob.csv_dict)
print(bob.csv_fieldnames)