Place default profile image based on gender in django

I need help on selecting a default profile picture depending on the gender of the user.. I have three default images in my media folder that i want to use as defaults, namely "00.png, 01.png, and 02.png".

models.py

GenderChoice = (
    ('others', 'Others'),
    ('male', 'Male'),
    ('female' :'Female')
) 

class User(AbstractBaseUser):
    gender = models.CharField(choice=GenderChoice)
    pro_pic = models.ImageField(upload_to ="", default ="00.png")

what I want is if a user selects gender="others" then 00.png should be saved as default and if they select male the 01.png should be selected as default..

Please help🙏🙏🙏