dish.py

def Dish(object):
    def __init__(self, name, price, calories):
        self.name = name
        self.price = price
        self.calories = calories
    
    @classmethod
    def _get_info(cls):
        name = input("Please enter the dish's name: ")
        price = float(input("Please enter the dish's price: "))
        calories = int("Please enter the dish's calories: ")
        return cls(name, price, calories)
        
    def __str__(self):
        return "\n".join([ self.name,
                          "Price: ${:.2f}".format(self.price),
                          "Calories: {}".format(self.calories)])

get_info = Dish._get_info

main.py

import dish

def menu_enter():
    menu = []
    while True:
        n = input("Do you want to add a dish? ")
        if n.lower() == 'yes':
            d = dish.get_info()
            menu.append(d)  # or str(d) maybe? I'd want to keep the dish object!
        else:
            for dish in menu:
                print(dish)
                print()  # empty line between dishes
            break