added reference to JanusGraph-Python package

Signed-off-by: pm-osc <pm2.osc@gmail.com>

Author: pm-osc

docs/basics/connecting/python.md

@@ -47,8 +47,38 @@ print(f'Hercules is {hercules_age} years old.')
     `next()` is a terminal step that submits the traversal to the
     Gremlin Server and returns a single result.
 
-## JanusGraph Specific Types and Predicates
+## JanusGraph-Python for JanusGraph Specific Types and Predicates
 
 JanusGraph contains some types and [predicates](../search-predicates.md) that
 are not part of Apache TinkerPop and are therefore also not supported by
 Gremlin-Python.
+[JanusGraph-Python](https://github.com/JanusGraph/janusgraph-python) is a Python
+package that adds support for some of these types and predicates to Gremlin-Python.
+
+After installing the package, a message serializer needs to be configured for
+JanusGraph which can be done like this for GraphSON 3:
+
+```python
+from gremlin_python.driver.driver_remote_connection import DriverRemoteConnection
+from janusgraph_python.driver.serializer import JanusGraphSONSerializersV3d0
+
+connection = DriverRemoteConnection(
+  'ws://localhost:8182/gremlin', 'g',
+  message_serializer=JanusGraphSONSerializersV3d0())
+```
+
+or like this for GraphBinary:
+
+```python
+from gremlin_python.driver.driver_remote_connection import DriverRemoteConnection
+from janusgraph_python.driver.serializer import JanusGraphBinarySerializersV1
+
+connection = DriverRemoteConnection(
+  'ws://localhost:8182/gremlin', 'g',
+  message_serializer=JanusGraphBinarySerializersV1())
+```
+
+Refer to [the documentation of JanusGraph-Python](https://github.com/JanusGraph/janusgraph-python#janusgraph-python)
+for more information about the package, including its [compatibility with
+different JanusGraph versions](https://github.com/JanusGraph/janusgraph-python#version-compatibility)
+and differences in support between the different [serialization formats](https://github.com/JanusGraph/janusgraph-python#serialization-formats).