Hi, is there a

Serializer

that serializes

str

?

Hi @Luke Orland - I believe the

JSONSerializer

will do what you’re looking for

Thanks, Chris. My use case here is checkpointing the output of a

prefect.tasks.jupyter.ExecuteNotebook

task, which is a JSON string. To store that as an

.ipynb

file, I was converting that json to a dict so that the

JSONSerializer

would dump it back to JSON string. My approach that seems to be working is to subclass

Serializer

, with these implementations:

Oh I understand your use case - nice! Your serializer definitely makes sense; I see two ways we might include this back into the library: - include your

StringSerializer

implementation into the serializer library - change the return type of

ExecuteNotebook

to be an actual dictionary instead of a JSON string; this way the

JSONSerializer

works out-of-the-box I would prefer the latter although I’m not sure if there was a reason for the JSON string return type; whichever way we go, it would be interesting to allow for specifying serializers at the task level so that we could default to these serializers for this task so other users don’t have to worry about it.

Yeah, that's a nice idea!

I’ll open an issue for us: @Marvin open “Change return type of ExecuteNotebook and allow tasks to specify default result serializers”

For the ExecuteNotebook task, there are 2

output_format

options--JSON and HTML. The JSON output, if written to a

.ipynb

file, can be read as a notebook file by Jupyter. For HTML output, that

.html

file can be rendered by a web browser. Either way, the output is

str

and should be serialized by something like a

StringSerializer

.

dict

output from that task wouldn't really work if HTML is the selected

output_format

.