https://github.com/dequis/wild_hook

very useful python syntax extension
https://github.com/dequis/wild_hook

Last synced: 3 months ago
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very useful python syntax extension

• Host: GitHub
• URL: https://github.com/dequis/wild_hook
• Owner: dequis
• Created: 2020-04-26T17:41:00.000Z (about 5 years ago)
• Default Branch: master
• Last Pushed: 2020-04-26T18:07:51.000Z (about 5 years ago)
• Last Synced: 2025-03-07T03:30:57.016Z (3 months ago)
• Language: Python
• Size: 3.91 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Wild hook

A python import hook that rewrites source files to add one extra feature:

    import module*

That's all.

It only imports the first match. Might break zip imports. Likely also disables

`.pyc` caching. Doesn't work with `__main__` so use `python -m`.

## Installation

    $ cp wild_hook.py usercustomize.py $(python -m site --user-site)

## Demo

    $ cat example.py

    import test*

    $ cat testfoo.py

    print('foo')

    $ python -m example

    foo

Exciting, right?

## Why

A certain someone read the docs of openscad and thought that includes behaved

like this, allowing wildcards but only taking the first match. A couple of

hours later we realized it doesn't, but I already had 80% of this shitpost

written up.

## What name do I use to access that module in the code?

Does it look like I thought this through?

## References

These pages were useful while writing this:

* https://docs.python.org/3/library/importlib.html#setting-up-an-importer

    * A bare but useful example on how to set up an importer that just uses the

      same class as the default one.

* https://stackoverflow.com/questions/43571737/how-to-implement-an-import-hook-that-can-modify-the-source-code-on-the-fly-using

    * Has a concrete example of subclassing those classes, although not in the

      most convenient way.

* https://stackoverflow.com/questions/214881/can-you-add-new-statements-to-pythons-syntax

    * Several neat ideas, like rewriting the token stream with the tokenizer

      module (used in this project), or using sys.settrace (not used)

* https://github.com/ajalt/fuckitpy

    * Didn't use any ideas from here, but worth looking at for AST manipulation

      inspiration