Why isn't printing?

[SpookyStuff]

class Dog:
    def __init__(self, breed, age, color, is_mixed):
        self.breed = breed
        self.age = age
        self.color = color
        self.is_mixed = is_mixed

dog1 = Dog("Border Collie", 3, "white", True)
dog2 = Dog("Golden Retriever", 0.5, "brown", False)
dog3 = Dog("Poodle", 5, "black", True)

print(dog2.breed)
#iisn't printing 

[deanhystad]

What makes you think it doesn't print? How do you run the program? Where are you looking for output? There are no errors in the program. It works fine for me.

You should add a __str__() method to your class so you can print a description of the dog. Like this:

class Dog:
    def __init__(self, breed, age, color, is_mixed):
        self.breed = breed
        self.age = age
        self.color = color
        self.is_mixed = is_mixed

    def __str__(self):
        if self.is_mixed:
            return f"Dog: {breed} mix, color={self.color}, age={self.age}"
        return f"Dog: {breed}, color={self.color}, age={self.age}"


dogs = (
    Dog("Border Collie", 3, "white", True),
    Dog("Golden Retriever", 0.5, "brown", False),
    Dog("Poodle", 5, "black", True),
)

print(*dogs, sep="\n")

Output:
Dog: Border Collie mix, color=white, age=3
Dog: Golden Retriever, color=brown, age=0.5
Dog: Poodle mix, color=black, age=5

Or you could make this a dataclass. Using the dataclass decorator adds several features to your class. It writes the __init__() method for you. It provides a good __str__() method (actually it is a __repr__() method that is a lot like __str__(), It provides comparison operators. Not terribly important for a Dog class, but you could use it to srot the dogs by breed (fields are used when making comparisons). It also does type checking. It will not let you make a Dog that is "brown" years old and has 3.5 hair (mix up order of arguments when creating object).

from dataclasses import dataclass.
@dataclass
class Dog:
    breed: str
    age: float
    color: str
    is_mixed: bool = False  # Assume False unless otherwise specified


dogs = (
    Dog("Border Collie", 3, "white", True),
    Dog("Golden Retriever", 0.5, "brown"),
    Dog("Poodle", 5, "black", True),
)

print(*dogs, sep="\n")

Output:
Dog(breed='Border Collie', age=3, color='white', is_mixed=True)
Dog(breed='Golden Retriever', age=0.5, color='brown', is_mixed=False)
Dog(breed='Poodle', age=5, color='black', is_mixed=True)

You can read about dataclasses here: https://docs.python.org/3/library/dataclasses.html

[buran]

#iisn't printing

the code works just fine. it prints Golden Retriever