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Secret Recipes of the Python Ninja
book

Secret Recipes of the Python Ninja

by Cody Jackson
May 2018
Intermediate to advanced content levelIntermediate to advanced
380 pages
9h 37m
English
Packt Publishing
Content preview from Secret Recipes of the Python Ninja

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If __all__ is not defined in __init__.py, then import * only imports the modules within the specified package, not all sub-packages or their modules. For example, from video.formats import * only imports the video formats; the modules in the effects/ directory will not be included.

This is a best practice for Python programmers: as the Zen of Python (https://www.python.org/dev/peps/pep-0020/) states, explicit is better than implicit. Thus, importing a specific sub-module from a package is a good thing, whereas import * is frowned upon because of the possibility of variable name conflicts.

Packages have the __path__ attribute, which is rarely used. This attribute is a list that has the name of the directory where the package's ...

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Publisher Resources

ISBN: 9781788294874Supplemental Content