# What is __init__.py in Python?

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The __init__.py files are required to make Python treat the directories as containing packages; this is done to prevent directories with a common name, such as string, from unintentionally hiding valid modules that occur later on the module search path. In the simplest case, __init__.py can just be an empty file, but it can also execute initialization code for the package or set the __all__ variable. An example of the __init__.py file:

from math import sin
from my_package import my_func

The above code ensures that the imported functions are available in the package's modules when it is imported as it is defined in the __init__.py file. You can read more about __init__.py at http://mikegrouchy.com/blog/2012/05/be-pythonic-__init__py.html

Updated on 16-Dec-2019 06:14:02