python / python/mypy

hook for missing imports

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feature topic-plugins
Dominant language
Python
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Description

I have an Apache Airflow project and in that framework there's a massive use of dynamic module loading e.g. by manually creating modules from plugins and adding them to sys.modules.

I would like mypy to analyze my plugins but It cannot find those dynamic modules. One possible solution is to enable mypy plugins to provide a hook to resolve those imports the same way that is implemented in pylint: http://pylint.pycqa.org/projects/astroid/en/latest/extending.html#failed-import-hooks

Is there an easier way to achieve this?

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reviewing mypy's plugin extension points and the failed-import hooks described in the linked astroid documentation. Determine whether an existing mechanism can support dynamically created modules; done would mean a decided, documented approach or an implemented plugin hook for resolving those imports.

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Assessment

Tech stack
python
Domain
devtools
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
25/100

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