Use raw strings in some docstrings to avoid SyntaxWarning in Python 3.12 .

Author: rtb-zla-karma

cassandra/cqlengine/connection.py

@@ -315,7 +315,7 @@ def setup(
         lazy_connect=False,
         retry_connect=False,
         **kwargs):
-    """
+    r"""
     Setup a the driver connection used by the mapper
 
     :param list hosts: list of hosts, (``contact_points`` for :class:`cassandra.cluster.Cluster`)

cassandra/cqlengine/query.py

@@ -196,7 +196,7 @@ def _execute_callbacks(self):
             callback(*args, **kwargs)
 
     def add_callback(self, fn, *args, **kwargs):
-        """Add a function and arguments to be passed to it to be executed after the batch executes.
+        r"""Add a function and arguments to be passed to it to be executed after the batch executes.
 
         A batch can support multiple callbacks.
 
@@ -272,7 +272,7 @@ def __exit__(self, exc_type, exc_val, exc_tb):
 
 
 class ContextQuery(object):
-    """
+    r"""
     A Context manager to allow a Model to switch context easily. Presently, the context only
     specifies a keyspace for model IO.