Let's say I want to create two classes Owner and Pet

class Owner(object):
    def __init__(first_name, last_name, address, phone):
        self.first_name = first_name
        self.last_name = last_name
        self.address = address
        self.phone = phone

class Pet(object):
    def __init__(name, owner)
        self.name = name
        self.owner = Owner.__init__(first_name, last_name, address, phone)

Did I pass the class Owner as a parameter to the class Pet correctly or not? If not, then how is it done properly? Thanks.

You didn't do it properly the way you set it up. You can do one of a few ways. I will show you the two I use

1) change line 11 to

self.owner = owner

Then when you are running it, create an Owner first, then pass that into the Pet.

x = Owner("Bob", "Marley", "Address", "111-111-1111"
y = Pet("Spot", x)

Or
2) Change the Pet class to this

class Pet(object):
    def __init__(self, name, first_name, last_name, address, phone):
        self.name = name
        self.owner = Owner(first_name, last_name, address, phone)

Also, your "__init__" needs to have "self" as the 1st parameter.
like this.

def __init__(self, other_parameters):

self name for the first parameter is just convention, but mostly it is sensible to use that name for that for clarity.

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