Printing objects from one class with another class Python

Question

I wrote a simple object oriented code with python. In first class named A I used __str__ so that I can print my objects. In another class I put those objects in obj_list. My question is, why I can print my object with class A, but when I want to print as print(my_object.obj_list) I do not get string representation of my object?

class A:
    def __init__(self, name):

        self.name = name

    def __str__(self):

        info = "My name is: " + self.name
        return info

obj_1 = A("Mike")
obj_2 = A("Jon")
obj_3 = A("Steve")

print(obj_1, obj_2, obj_3)


class B:
    def __init__(self):
        self.obj_list = [obj_1, obj_2, obj_3]


my_object = B()

print(my_object.obj_list)

Because list.__str__ only uses the __repr__ method of any objects in the string. If you want a different string representation of a list, you need to build it yourself. — chepner
– chepner, Commented May 7, 2019 at 16:17

Olvin Roght · Accepted Answer · 2019-05-07 16:17:15Z

1

You're overriding __str()__ method, which called when something try to convert your class to string, i.g. print(). When you create a list of objects it put references of objects in the list and that's all. If you want them to be converted to string in any case, change:

def __str__(self):

to:

def __repr__(self):

answered May 7, 2019 at 16:17

Olvin Roght

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