Remove use of OrderedDict in various places (#1483)

* Remove use of OrderedDict in Connection.info.

* Remove remnant use of collections.OrderedDict

* Undo QoS._delivered move to Python standard dictionary.

This requires more work to convert, due to a hack in how the dictionary
is used.

* Undo LRUCache.data to dict conversion.

It's also problematic, and caused tests to fail.

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Revert QoS._delivered comment chagne.

* Update comment

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

kombu/connection.py

@@ -2,7 +2,6 @@
 
 import os
 import socket
-from collections import OrderedDict
 from contextlib import contextmanager
 from itertools import count, cycle
 from operator import itemgetter
@@ -658,7 +657,7 @@ class Connection:
 
     def info(self):
         """Get connection info."""
-        return OrderedDict(self._info())
+        return dict(self._info())
 
     def __eqhash__(self):
         return HashedSeq(self.transport_cls, self.hostname, self.userid,

kombu/transport/qpid.py

@@ -92,7 +92,6 @@ import socket
 import ssl
 import sys
 import uuid
-from collections import OrderedDict
 from gettext import gettext as _
 from queue import Empty
 from time import monotonic
@@ -189,7 +188,7 @@ class QoS:
     def __init__(self, session, prefetch_count=1):
         self.session = session
         self.prefetch_count = 1
-        self._not_yet_acked = OrderedDict()
+        self._not_yet_acked = {}
 
     def can_consume(self):
         """Return True if the :class:`Channel` can consume more messages.
@@ -229,8 +228,8 @@ class QoS:
         """Append message to the list of un-ACKed messages.
 
         Add a message, referenced by the delivery_tag, for ACKing,
-        rejecting, or getting later. Messages are saved into an
-        :class:`collections.OrderedDict` by delivery_tag.
+        rejecting, or getting later. Messages are saved into a
+        dict by delivery_tag.
 
         :param message: A received message that has not yet been ACKed.
         :type message: qpid.messaging.Message

kombu/transport/virtual/base.py

@@ -177,6 +177,8 @@ class QoS:
         self.channel = channel
         self.prefetch_count = prefetch_count or 0
 
+        # Standard Python dictionaries do not support setting attributes
+        # on the object, hence the use of OrderedDict
         self._delivered = OrderedDict()
         self._delivered.restored = False
         self._dirty = set()

t/unit/transport/test_qpid.py

@@ -4,7 +4,6 @@ import ssl
 import sys
 import time
 import uuid
-from collections import OrderedDict
 from collections.abc import Callable
 from itertools import count
 from queue import Empty
@@ -57,7 +56,7 @@ class test_QoS__init__:
         assert qos_limit_two.prefetch_count == 1
 
     def test__init___not_yet_acked_is_initialized(self):
-        assert isinstance(self.qos._not_yet_acked, OrderedDict)
+        assert isinstance(self.qos._not_yet_acked, dict)
 
 
 @pytest.mark.skip(reason='Not supported in Python3')