How to import object of a class in python

Question

I had a class in as below in module practice. practice/example.py

class Example :

    #some code#

e1= Example();
e2= Example();

and I had practice/__init__.py

from example import Example

and i had main.py

import sys , python_practice


e3 = python_practice.Example();


from python_practice import *

e1.sum(1,2);

but i am getting error as

Traceback (most recent call last):
File "practice.py", line 11, in <module>
e1.sum(1,2);
NameError: name 'e1' is not defined

Where I went wrong....

Is it possible to import the object of the class to another module ?

BrenBarn · Accepted Answer · 2013-09-27 06:38:38Z

4

Yes, you just have to import it.

When you do from python_practice import *, you get everything defined in practice/__init__.py. In that __init__.py, you don't import e1, so you don't import it with from python_practice import * either.

If you want e1 to be available at the top level python_practice, you need to import it in __init__.py. Change your code there to from example import Example, e1, e2.

answered Sep 27, 2013 at 6:38

BrenBarn

253k39 gold badges421 silver badges392 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

mkreddy Over a year ago

If suppose i didn't had init.py in the python_practice module how can i import the object ? Is there any other way of doing it.

BrenBarn Over a year ago

If you don't have __init__.py you don't have a package at all, so you can't import it at all. If you had the practice directory directly on the path, you could import it with from example import Example, e1, e2, but it probably would not be a good idea to create a top-level package named example.

mkreddy Over a year ago

Hello BrenBarn..... Thank you for the help. Now i had a different issue. I wnat some help. In the above exaple i know the instance of the class as e1 or e2. But in my application i am managed to get the object name as string. with that string how can i will be able to access the object.

BrenBarn Over a year ago

@mkreddy: You should ask that as a separate question.

mgilson · Accepted Answer · 2013-09-27 06:38:34Z

2

__init__ sets up the namespace for your package. Since __init__ imports Example, then Example is available in the package namespace (e.g. python_practice.Example). e1 is not available there because nothing you did in __init__ makes e1 available there.

Of course, you can pretty much always get there ...

from python_practice.example import e1

should work.

answered Sep 27, 2013 at 6:38

mgilson

312k70 gold badges656 silver badges722 bronze badges

Collectives™ on Stack Overflow

How to import object of a class in python

2 Answers 2

4 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

4 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related