Calculate AGE in years

[DeaD_EyE]

You still need to import the classes datetime and date.
Also calendar.isleap.

from calendar import isleap
from datetime import datetime, date


class Persoon:
    def __init__(self, naam, sekse, geboortedatum):
        self._naam = naam
        self._sekse = sekse
        self._geboortedatum = datetime.strptime(geboortedatum, "%d-%m-%Y").date()
 
    @property
    def naam(self):
        return self._naam
 
    @property
    def geb_datum(self):
        return self._geboortedatum
 
    @property
    def vrouw(self):
        return self._sekse == "V"
 
    @property
    def man(self):
        return self._sekse == "M"
 
    def leeftijd(self, today=None):
        today = today or date.today()
        years = today.year - self.geb_datum.year
        geboortedatum = self.geb_datum
 
        # leap fix 29 feb.
        if (
            geboortedatum.month == 2
            and geboortedatum.day == 29
            and not isleap(today.year)
        ):
            geboortedatum = date(geboortedatum.year, 3, 1)
 
        if (today.month, today.day) < (self.geb_datum.month, self.geb_datum.day):
            years -= 1
 
        return years
 
 
p1 = Persoon("John", "M", "29-2-1980")
# 2023 is not a leap year
print(p1.naam, p1.leeftijd(date(2023, 3, 1)))