I'm working on a Flask application with a route that performs extensive processing of data before a response is returned to the user. Each step of this data processing has its own function, and each function is a potential point of failure. Each function returns some piece of data that is used to either build the response, or is used in the next function. In the event of a failure, the route should return a proper error message and status code based on where the failure occurred.
My first, naive approach was to individually wrap each function call in a try-except block, then return an error message and status code if an error was raised. This resulted in a wall of try-except blocks that worked, but looked poorly developed.
Is there a widely accepted structure or best practice for routes that have many potential points of failure?
Hope this help you: sample structure.
In app, you can use register_error_handler to apply a handle exception before responding to user without use try-except.
See this file, It help you to format error response