diff --git a/kombu/transport/pypika.py b/kombu/transport/pypika.py
index 71ad54d4..d4fe1d1c 100644
--- a/kombu/transport/pypika.py
+++ b/kombu/transport/pypika.py
@@ -46,6 +46,7 @@ class Channel(channel.Channel):
 
     def basic_get(self, queue, no_ack):
         method = channel.Channel.basic_get(self, queue=queue, no_ack=no_ack)
+        # pika returns semi-predicates (GetEmpty/GetOk).
         if isinstance(method, Basic.GetEmpty):
             return
         return None, method, method._properties, method._body
@@ -66,11 +67,16 @@ class Channel(channel.Channel):
                                                  mandatory,
                                                  immediate)
         finally:
+            # Pika does not automatically flush the outbound buffer
+            # TODO async: Needs to support `nowait`.
             self.handler.connection.flush_outbound()
 
     def basic_consume(self, queue, no_ack=False, consumer_tag=None,
             callback=None, nowait=False):
 
+        # Kombu callbacks only take a single `message` argument,
+        # but pika applies with 4 arguments, so need to wrap
+        # these into a single tuple.
         def _callback_decode(channel, method, header, body):
             return callback((channel, method, header, body))
 
@@ -81,7 +87,6 @@ class Channel(channel.Channel):
     def prepare_message(self, message_data, priority=None,
             content_type=None, content_encoding=None, headers=None,
             properties=None):
-        """Encapsulate data into a AMQP message."""
         properties = BasicProperties(priority=priority,
                                      content_type=content_type,
                                      content_encoding=content_encoding,
@@ -90,7 +95,6 @@ class Channel(channel.Channel):
         return message_data, properties
 
     def message_to_python(self, raw_message):
-        """Convert encoded message body back to a Python value."""
         return self.Message(channel=self, amqp_message=raw_message)
 
     def basic_ack(self, delivery_tag):