如果输入狗，猫或鸟，我如何让我的程序显示动物发出的噪音

Question

name = input("What is your pet's name?")
species = input("What type of pet is it?")
age = input("How old is your pet?")

class Pet:
    def __init__(self, name, species, age, noise):
        self.name = name
        self.species = species
        self.age = age
        self.noise = noise

    def setNoise(self, noise):
            self.noise = "WOOF"
        elif species == cat:
            self.noise = "MEOW!"
        elif species == bird:
            self.noise = "CAWW!"
        else:
            self.noise = "Animal Noise"

    def get_type(self):
        print("Pet")

    def toString(self):
        return"{} is a {} and is {} years old".format(self.name,self.species,self.age,self.noise)

myPet = Pet(name,species,age,noise)
print(noise, myPet.toString())

i cannot figure out how to make my program display a noise when i type a certain animal in it, such as a dog, cat, or bird. any help would be amazing. I keep running into the error that noise is not defined. also when i try to use my species input to check if it equals dog it errors out.

Answer 1

I think this might be what you're trying to get. You used the cat , bird , etc. variables without defining them. I assume these should be strings. I also got rid of the setNoise function which didn't seem to have a purpose. Since the noise is based on the species, I set it at __init__ . Python also has a special method called __str__ . If you set this, then when I call print(myPet) it will print the return value of myPet.__str__() . This is better to use than defining your own string method because it gets called automatically when printing.

name = input("What is your pet's name?")
species = input("What type of pet is it?")
age = input("How old is your pet?")
# you might want to set age = int(age) if age is, e.g., an integer number of years

class Pet:
    def __init__(self, name, species, age):
        self.name = name
        self.species = species
        self.age = age

        if species == "dog":
            self.noise = "WOOF"
        elif species == "cat":
            self.noise = "MEOW!"
        elif species == "bird":
            self.noise = "CAWW!"
        else:
            self.noise = "Animal Noise"

    def get_type(self):
        print("Pet")

    def __str__(self):
        return"{} is a {} and is {} years old".format(self.name,self.species,self.age,self.noise)

myPet = Pet(name, species, age)
print(myPet.noise, myPet)