I want to write an original program, and this happens

from peewee import *

db = SqliteDatabase('orders.db')

class PizzaOrder(Model):
    name = CharField(max_length=60)
    lunches = IntegerField()
    extra_slices = IntegerField()
    slices = IntegerField()
    pepperoni = IntegerField()
    cheese = IntegerField()
    price = IntegerField()

    class Meta:
        database = db

def create_pizza_order(name, lunches, extra_slices, pepperoni):
    slices = lunches + extra_slices
    cheese = slices - pepperoni
    price = (lunches * 2) + extra_slices

    PizzaOrder.create(name=name, lunches=lunches, extra_slices=extra_slices,
                      slices=slices, pepperoni=pepperoni, cheease=cheese, price=price)

if __name__ == "__main__":
    db.connect()
    db.create_tables([PizzaOrder], safe=True)