How to write a code to get this kind of output in IDLE

[kavindu]

In IDLE I imported sympy.matrices module

for an example
I entered the following

>>> from sympy.matrices import Matrix
>>> a=Matrix([[1,2,3],[4,5,6],[7,8,9]])
>>> a
Matrix([
[1, 2, 3],
[4, 5, 6],
[7, 8, 9]])

and also I imported a custom library created by me.
this is a part of my module

class dog:
    def __init__(self,name,age,gender):
        self.name=name
        self.age=age
        self.gender=gender

In IDLE I entered following in the same as the previous

>>> from my_modules.dog import dog
>>> b=dog("sam",5,"male")
>>> b
<my_modules.dog.dog object at 0x00460950>

the problem is I entered codes in the same way. But the outputs are in the different forms

in first example it gave the following output instead of giving an output
just like <sympy.matrices.Matrix object at 0x00512950>

Output:
Matrix([
[1, 2, 3],
[4, 5, 6],
[7, 8, 9]])

I need to know how to code my custom module to return an output just like

>>>b
Dog('sam','5years','male')

instead of <my_modules.dog.dog object at 0x00460950>

can someone help Me please

[microphone_head]

Looks like your almost there.

I think you need to be more specific on your last line, try putting the following into the shell:

b.name + ", " + b.age + ", " + b.gender

[kavindu]

No Mister

I don't mean that.

after creating the "Dog" object "b", I entered this in IDLE

>>> b

It returns the object type of the object "b" and the ID of the object.

But in the first example I created the "Matrix" object "a".
By entering

>>> a

It returns the Matrix instead of it's type and ID

I'm asking for the method used in Matrix object

I'm not talking about the print function or something like that

[wavic]

Your class is missing __repr__ method.

[snippsat]

You need to implement a __repr__ as mention bye @wavic,can also trow in a __str__ method.

class Dog:
    def __init__(self, name, age, gender):
        self.name = name
        self.age = age
        self.gender = gender

    def __str__(self):
        return f'Name: {self.name} Age: {self.age}-year and Gender: {self.gender}'

    def __repr__(self):
        return f'Name: {self.name} Age: {self.age}-year and Gender: {self.gender}'

Output:
>>> from my_module import Dog
>>> 
>>> obj = Dog('Sam', 5, 'Male')
>>> obj # call __repr__
Name: Sam Age: 5-year and Gender: Male
>>> 
>>> print(obj) # call __str__
Name: Sam Age: 5-year and Gender: Male

Without the obj will look like this.

>>> from my_module import Dog
>>> 
>>> obj = Dog('Sam', 5, 'Male')
>>> obj
<my_module.Dog object at 0x055AD110>
>>> print(obj)
<my_module.Dog object at 0x055AD110>
>>> 
>>> obj.name # This will work in both examples
'Sam'
>>> obj.age
5
>>> obj.gender
'Male'

[wavic]

Usually the __repr__ method returns the what you run to create the instance of that class.

def __repr__(self):
    return f'Dog({self.name}, {self.age}, {self.gender})'