declaring classes from imported modules in python

Question

In python you have to use

import <module>

to import a file with classes.

Imagine the module contains multiple classes

And now I want to declare an object

x = module.object1Name(parameter1,parmeter2)

How can I declare that object without having to access it through module?
(So like this below)

x = object1Name(parameter1,parameter2)

Also I do not want to use the following because it would mean I would have to do that for every class.

from <module> import <objectName>

Asked By: Muffin

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Source

Answer 1

You can combine multiple from <module> import <objectName> statements with commas and parentheses.

For example:

from <module> import <objectNameA>, <objectNameB>

or

from <module> import (<objectNameA>, <objectNameB>)

The latter will work across multiple lines (ref).

Using import * from <module> (import everything from <module>) is bad because it risks overriding functions, classes, and variables from other modules, and it violates the Zen of Python "better to be explicit" value.

Answered By: tehCheat

Answer 2

You can use the following statement, that will import everything from the module:

from <module> import *

But it is not a good practice, for some reasons:

Your code must import only what you uses.
The zen of python says "explicit is better than implicit", so if you want to use something, you need to import it explicitly.
Improve the readability of your code.

I suggest to use the explicit imports in what you want to use.

from <module> import <object1>, <object2>

Or, like below:

from <module> import (
    <object1>,
    <object2>,
    <object3>,
    <object4>
)

Answered By: João Paulo Carvalho

declaring classes from imported modules in python

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