Python SDK migration guide: v0.3 to v0.4

This guide will help you migrate your Inngest Python SDK from v0.3 to v0.4 by providing a summary of the breaking changes.

Middleware

Constructor

Added the raw_request arg to the constructor. This is the raw HTTP request received by the serve function. Its usecase is predominately for platforms that include critical information in the request, like environment variables in Cloudflare Workers.

transform_input

Added the steps arg, which was previous in ctx._steps. This is useful in encryption middleware.

Added the function arg, which is the inngest.Function object. This is useful for middleware that needs to know the function's metadata (like error reporting).

Its return type is now None since modifying data should happen by mutating args.

transform_output

Replaced the output arg with result arg. Its type is the new inngest.TransformOutputResult class:

class TransformOutputResult:
    # Mutations to these fields within middleware will be kept after running
    # middleware
    error: typing.Optional[Exception]
    output: object

    # Mutations to these fields within middleware will be discarded after
    # running middleware
    step: typing.Optional[TransformOutputStepInfo]

class TransformOutputStepInfo:
    id: str
    op: Opcode
    opts: typing.Optional[dict[str, object]]

Its return type is now None since modifying data should happen by mutating args.

Removed exports

• inngest.FunctionID -- No use case.
• inngest.Output -- Replaced by inngest.TransformOutputResult.

Removed async_mode arg in inngest.django.serve

This argument is no longer needed since async mode is inferred based on the Inngest functions you declare. If you have one or more async Inngest functions then async mode is enabled.

NonRetriableError

Removed the cause arg since it wasn't actually used. We'll eventually reintroduce it in a proper way.