create_component_from_func vs func_to_container_op

[thethiny]

I don't seem to understand the behavior behind these two functions.
I have been using create_component_from_func for all of my pipelines, however all tutorials and guides I'm seeing online use func_to_container_op and the docstrings don't explain them enough (They both say Converts a Python function to a component and returns a task).
Can anyone elaborate on this as the documentation doesn't include much info about this?

[wenboown]

What is the difference between create_component_from_func and func_to_container_op?
They are equivalent, but func_to_container_op is deprecated in v2 of the SDK. For more information on what has been deprecated see here:
#6133

Credit: Alexandre Brown in Community Slack

ref: https://journal.arrikto.com/kubeflow-tips-tricks-january-2022-238fde12f7d0

[zijianjoy]

We are moving away from func_to_container_op in KFPv1, we suggest to use create_component_from_func in KFPv1.

For KFPv2, we are moving away from both approaches above. We recommend using @component decorator in KFPv2.

Feel free to reopen this issue if you need more help.

[casassg]

@zijianjoy will create_component_from_func add extra_code? It's sometimes useful when defaults in a function are not a python primitive.

[zijianjoy]

cc @connor-mccarthy Do we support extra_code in create_component_from_func?

[connor-mccarthy]

create_component_from_func does not support extra_code, though for some use-cases you can work around this by using subprocess.call or os.system to execute a subprocess within the Python code itself

[casassg]

This won't work as we need to add extra code before the function is instantiated in order to avoid issues on default values from the parsed function.

[connor-mccarthy]

@casassg, I see. Yes, unfortunately that's one of the use-cases where this workaround will not work. The other approach is creating a containerized component that implements this.

I suspect this is a fairly common use-case. If you feel strongly about having extra_code functionality, please feel free to open a feature request issue requesting that this be included in v2, then the community can upvote it.