#__init__

[youjirec]

# ```import *``` と ```__init__.py``` の ```__all__``` の関係 「[Python チュートリアル](https://docs.python.jp/3/tutorial/index.h...

[get-python]

__init__.py

Reference: the book - Chapter 5 of Introducing Python

boxes -|-- weather.py |-- sources --|-- __init__.py |-- daily.py |-- weekly.py

If the folder contains __init__.py file, Python would treat it as a package.

For this example, sources is a pacakge and it contains the two modules: daily and weekly.

An example to use the package you created:

Main program: boxes/weather.py.

from sources import daily, weekly print("Daily forecast:", daily.forecast()) print("Weekly forecast:") for number, outlook in enumerate(weekly.forecast(), 1): print(number, outlook)

[st-hakky]

This is hopefully the first in a series of posts about writing Pythonic code and explaining some common Python idioms.

[st-hakky]

Files named __init__.py are used to mark directories on disk as a Python package directories.

[jacob-cs]

Use __new__ when you need to control the creation of a new instance. Use __init__ when you need to control initialization of a new instance. __new__ is the first step of instance creation. It's called first, and is responsible for returning a new instance of your class. In contrast, __init__ doesn't return anything; it's only responsible for initializing the instance after it's been created. In general, you shouldn't need to override __new__ unless you're subclassing an immutable type like str, int, unicode or tuple.