diff --git a/synapse/util/caches/__init__.py b/synapse/util/caches/__init__.py
index dd356bf156..237f588658 100644
--- a/synapse/util/caches/__init__.py
+++ b/synapse/util/caches/__init__.py
@@ -43,7 +43,7 @@ response_cache_total = Gauge("synapse_util_caches_response_cache:total", "", ["n
@attr.s
-class CacheMetric(object):
+class CacheMetric:
_cache = attr.ib()
_cache_type = attr.ib(type=str)
diff --git a/synapse/util/caches/descriptors.py b/synapse/util/caches/descriptors.py
index 825810eb16..98b34f2223 100644
--- a/synapse/util/caches/descriptors.py
+++ b/synapse/util/caches/descriptors.py
@@ -64,7 +64,7 @@ cache_pending_metric = Gauge(
_CacheSentinel = object()
-class CacheEntry(object):
+class CacheEntry:
__slots__ = ["deferred", "callbacks", "invalidated"]
def __init__(self, deferred, callbacks):
@@ -80,7 +80,7 @@ class CacheEntry(object):
self.callbacks.clear()
-class Cache(object):
+class Cache:
__slots__ = (
"cache",
"name",
@@ -288,7 +288,7 @@ class Cache(object):
self._pending_deferred_cache.clear()
-class _CacheDescriptorBase(object):
+class _CacheDescriptorBase:
def __init__(self, orig: _CachedFunction, num_args, cache_context=False):
self.orig = orig
@@ -705,7 +705,7 @@ def cachedList(
Example:
- class Example(object):
+ class Example:
@cached(num_args=2)
def do_something(self, first_arg):
...
diff --git a/synapse/util/caches/dictionary_cache.py b/synapse/util/caches/dictionary_cache.py
index 6834e6f3ae..8592b93689 100644
--- a/synapse/util/caches/dictionary_cache.py
+++ b/synapse/util/caches/dictionary_cache.py
@@ -40,7 +40,7 @@ class DictionaryEntry(namedtuple("DictionaryEntry", ("full", "known_absent", "va
return len(self.value)
-class DictionaryCache(object):
+class DictionaryCache:
"""Caches key -> dictionary lookups, supporting caching partial dicts, i.e.
fetching a subset of dictionary keys for a particular key.
"""
@@ -53,7 +53,7 @@ class DictionaryCache(object):
self.thread = None
# caches_by_name[name] = self.cache
- class Sentinel(object):
+ class Sentinel:
__slots__ = []
self.sentinel = Sentinel()
diff --git a/synapse/util/caches/expiringcache.py b/synapse/util/caches/expiringcache.py
index 89a3420f92..e15f7ee698 100644
--- a/synapse/util/caches/expiringcache.py
+++ b/synapse/util/caches/expiringcache.py
@@ -26,7 +26,7 @@ logger = logging.getLogger(__name__)
SENTINEL = object()
-class ExpiringCache(object):
+class ExpiringCache:
def __init__(
self,
cache_name,
@@ -190,7 +190,7 @@ class ExpiringCache(object):
return False
-class _CacheEntry(object):
+class _CacheEntry:
__slots__ = ["time", "value"]
def __init__(self, time, value):
diff --git a/synapse/util/caches/lrucache.py b/synapse/util/caches/lrucache.py
index df4ea5901d..4bc1a67b58 100644
--- a/synapse/util/caches/lrucache.py
+++ b/synapse/util/caches/lrucache.py
@@ -30,7 +30,7 @@ def enumerate_leaves(node, depth):
yield m
-class _Node(object):
+class _Node:
__slots__ = ["prev_node", "next_node", "key", "value", "callbacks"]
def __init__(self, prev_node, next_node, key, value, callbacks=set()):
@@ -41,7 +41,7 @@ class _Node(object):
self.callbacks = callbacks
-class LruCache(object):
+class LruCache:
"""
Least-recently-used cache.
Supports del_multi only if cache_type=TreeCache
diff --git a/synapse/util/caches/response_cache.py b/synapse/util/caches/response_cache.py
index a6c60888e5..df1a721add 100644
--- a/synapse/util/caches/response_cache.py
+++ b/synapse/util/caches/response_cache.py
@@ -23,7 +23,7 @@ from synapse.util.caches import register_cache
logger = logging.getLogger(__name__)
-class ResponseCache(object):
+class ResponseCache:
"""
This caches a deferred response. Until the deferred completes it will be
returned from the cache. This means that if the client retries the request
diff --git a/synapse/util/caches/treecache.py b/synapse/util/caches/treecache.py
index ecd9948e79..eb4d98f683 100644
--- a/synapse/util/caches/treecache.py
+++ b/synapse/util/caches/treecache.py
@@ -3,7 +3,7 @@ from typing import Dict
SENTINEL = object()
-class TreeCache(object):
+class TreeCache:
"""
Tree-based backing store for LruCache. Allows subtrees of data to be deleted
efficiently.
@@ -89,7 +89,7 @@ def iterate_tree_cache_entry(d):
yield d
-class _Entry(object):
+class _Entry:
__slots__ = ["value"]
def __init__(self, value):
diff --git a/synapse/util/caches/ttlcache.py b/synapse/util/caches/ttlcache.py
index 6437aa907e..3e180cafd3 100644
--- a/synapse/util/caches/ttlcache.py
+++ b/synapse/util/caches/ttlcache.py
@@ -26,7 +26,7 @@ logger = logging.getLogger(__name__)
SENTINEL = object()
-class TTLCache(object):
+class TTLCache:
"""A key/value cache implementation where each entry has its own TTL"""
def __init__(self, cache_name, timer=time.time):
@@ -154,7 +154,7 @@ class TTLCache(object):
@attr.s(frozen=True, slots=True)
-class _CacheEntry(object):
+class _CacheEntry:
"""TTLCache entry"""
# expiry_time is the first attribute, so that entries are sorted by expiry.
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