<filename>instablog/profiles/models.py
from django.db import models
from django.conf import settings

class Profile(models.Model):
	user = models.OneToOneField(settings.AUTH_USER_MODEL)
	_genders = (
		('M', 'Male'),
		('F', 'Female')
	)
	gender = models.CharField(max_length=1, choices=_genders)

<filename>instablog/profiles/models.py
from django.db import models
from django.conf import settings

class Profile(models.Model):
	user = models.OneToOneField(settings.AUTH_USER_MODEL)
	_genders = (
		('M', 'Male'),
		('F', 'Female')
	)
	gender = models.CharField(max_length=1, choices=_genders)
