How deeply does Python Workout: 50 ten-minute exercises cover __init__.py?

Defines initialization through executing __init__.py, but does not detail its contents beyond importing internal modules.

init.py

As explained in Python Workout: 50 ten-minute exercises

__init__.py is the conventional initialization file whose execution initializes a Python package when the package is imported.

__init__.py is the file that makes importing a package meaningful: importing mypackage loads and executes mypackage/__init__.py. That file can import modules such as first.py, allowing package-level initialization and access. section 8.10

A package with modules

Given mypackage/first.py, mypackage/second.py, and mypackage/third.py, import mypackage loads __init__.py. A package can then be imported directly, or a module can be imported with from mypackage import first or import mypackage.first. section 8.10

from mypackage import first

Inspect the concise package-level form for importing a module from mypackage. section 8.10

How Python Workout: 50 ten-minute exercises covers it

Cover of Python Workout: 50 ten-minute exercises

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Also explained in

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The Well-Grounded Python Developer: How the pros use Python and FlaskAn __init__.py file is a Python package file that marks a directory as a package and may contain package initialization code.
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The Quick Python Book, Fourth EditionAn __init__.py file is a Python package file that can contain initialization code executed when the package is imported.
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Python Workout, Second Edition__init__.py is a conventional Python package file whose code is executed when the containing package is imported.

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Related concepts

packageconfigures · A software package is a named grouping of modules or components, often with related resources and metadata, organized for import, reuse, distribution, or management.
packageconfigures · A package is a programming-language namespace and organizational unit that groups related code and may define import, compilation, or access boundaries.
side effectproduces · A software side effect is an observable change or interaction caused by an operation beyond producing its direct result, such as modifying state or performing input or output.
file objectkind of · A file object is a program-accessible representation of an open file or stream, including its access state and input/output operations.

This explainer was generated by Manning's knowledge graph from the text of Python Workout: 50 ten-minute exercises. The section links point to the parts of the book it draws on.