python how to get instance variables of a class to another class?

Question

I have two classes. When I create an instance in the first one would like to work with its attributes in my second class.

class Dog(object):
    def __init__(self, number):
        self.number_of_tricks = number

class Statistics(object):
    def get_number_of_tricks(self):
        return Dog(Max.number_of_tricks)

Now I create a instance >>> Max = Dog(15) and want the class "Statistics" be able to gain its value "number_of_tricks". For example something like >>> stat = Statistics(), >>>stat.get_number_of_tricks()

Why did you change self to snelf in get_number_of_tricks? — Sede
– Sede, Commented Jul 9, 2016 at 16:43

Moses Koledoye · Accepted Answer · 2016-07-09 16:55:05Z

5

Initialize your Statistics with that instance of Dog, then the attributes of that Dog will be accessible from Statistics:

class Dog(object):
    def __init__(self, number):
        self.number_of_tricks = number

class Statistics(object):
    def __init__(self, dog_instance):
        self.dog = dog_instance

    def get_number_of_tricks(self):
        return self.dog.number_of_tricks

And you can do:

>>> from my_module import Dog, Statistics
>>> Max = Dog(15)
>>> stat = Statistics(Max)
>>> stat.get_number_of_tricks()
15

edited Jul 9, 2016 at 16:55

answered Jul 9, 2016 at 16:40

Moses Koledoye

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