I think there is a mistake in the documentation on the page
What to consider when writing an Operator in Python
It is still said that the package of the PyOperatorSpi is
org.esa.snap.python.gpf. But actually it should be
eu.esa.snap.snappy.gpf
Or org.esa.snap.snappy.gpf.PyOperator is used where it actually should be
eu.esa.snap.snappy.gpf.PyOperator
Even in the example it is wrong and org.esa.snap.snappy.gpf.PyOperatorSpi is used.
snap-examples/snap-engine-python-operator/src/main/resources/META-INF/services at master · senbox-org/snap-examples (github.com)
Can you confirm and fix it?
@dolaf @diana_harosa
Thanks