Dear all!

I'm trying to develop my first app in Sawtooth, but fail in the very first step in the guide (Python):
https://sawtooth.hyperledger.org/docs/core/nightly/1-2/_autogen/sdk_TP_tutorial_python.html

from sawtooth_sdk.processor.core import TransactionProcessor
from sawtooth_xo.processor.handler import XoTransactionHandler

def main():
    # In docker, the url would be the validator's container name with
    # port 4004
    processor = TransactionProcessor(url='tcp://127.0.0.1:4004')

    handler = XoTransactionHandler()

    processor.add_handler(handler)

    processor.start()

I can't even run this file. Getting the Error:

$ python3.5 EntryPoint.py 
Traceback (most recent call last):
  File "EntryPoint.py", line 10, in <module>
    from sawtooth_xo.processor.handler import XoTransactionHandler
ImportError: No module named 'sawtooth_xo'

The package sawtooth_sdk is installed and I can call its methods. For sawtooth_xo is in pip no installation candidate.

I'm not sure if this part is even for implementation - if not, would you tell me where the appropriate point for starting is?

Thank you
Mario