'haystack.core.component' has no attribute 'output_types'

[gsouf]

Hi,

I copy pasted the example from the doc to create a custom component

from haystack.core import component

@component
class WelcomeTextGenerator:
    """
    A component generating personal welcome message and making it upper case
    """
    @component.output_types(welcome_text=str, note=str)
    def run(self, name:str):
        return {"welcome_text": ('Hello {name}, welcome to Haystack!'.format(name=name)).upper(), "note": "welcome message is ready"}

it fails with error AttributeError: module 'haystack.core.component' has no attribute 'output_types'

using haystack-ai version 2.4.0

Am I missing something?

[gsouf]

Found the answer, the doc has an error it's from haystack import component without core.

Sent an edit suggest from the website.