Functional analysis of the __init__.py file in the Python module package

This article example describes the __init__.py file function in Python module package. Shared for your reference, as follows:

django development has been more than a year, but basically did not pay attention to the significance of the existence of python modules in the __init__.py file, stumbled upon the introduction of its startled, this file is too important!

Module packages:

A package is usually a directory, and the first file in that directory is __init__.py. Then there are module files and subdirectories, and if there is a subdirectory with __init__.py in it, then it's a subpackage of the package.

It's almost like this:

Package1/ __init__.py          Package2  
Package1/Package2/ __init__.py             

We can import a package just like that:

import Package1 

Or tune into a sub-module and sub-package:

from Package1 import Module1 
from Package1 import Package2 
       ,import Packag1.Module1 
       ,import Packag1.Package2 

It is possible to go several layers deeper into the package structure:

from Package1.Package2 import Module1 
           ,import Package1.Package2.Module1 

That's about it, I think, the essence of the package should be in the __init__.py file.

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I hope that what I have said in this article will help you in Python programming.