document the lifecycle of a flask application and request #4973
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Document the Flask application structure. Distinguish between setting up the application, running the server, and handling each request. Document that setup should not be done after starting the server, and that methods might show an error to help avoid this. Document the many, many hooks and signals that run as part of each request.
I actually gave a talk about this (that probably went way too fast and technical) at PyCon Canada 2018, then never really followed up to write this missing information down in Flask. Until now.