In Directory

Any folder that contains __init___ becomes a Python package.

__init___ serves to:

• Initialize package-level variables
• Import submodules or contents
• Avoid circular imports

Allow from myapp.routes import users:

# myapp/__init__.py
from .routes import users
from .routes import products
from .routes import orders

In Class

__init__ is a constructor in a python class:

class MyClass:
    def __init__(self, name):
        self.name = name