Implement the newOutputMessage (just like java) in the python context

[szindel]

Currently the python Context object only has the publish method as option to publish messages to another topic. However this is quite problematic when using sinks in combination with python pulsar functions. Sinks (often) need a schema for every record.

Java already has the newOutputMessage method, that has record schema as function argument. it would be great if this can be added to the python context class.

[BewareMyPower]

Currently the Python function code base is maintained in https://github.com/apache/pulsar/tree/master/pulsar-functions/instance/src/main/python, so move the issue here.

[szindel]

how do you mean move the issue? your link is the same repo right..

[BewareMyPower]

This issue was opened at https://github.com/apache/pulsar-client-python/issues before and I moved it here