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authorJonathan de Jong <jonathan@automatia.nl>2021-04-05 15:10:18 +0200
committerGitHub <noreply@github.com>2021-04-05 09:10:18 -0400
commite2b8a90897e137fd118768a3bf35b70642916eb7 (patch)
tree60562fb54b2af8c61e940624f6821cbacf98a06c /synapse/util
parentFix version for bugbear (#9734) (diff)
downloadsynapse-e2b8a90897e137fd118768a3bf35b70642916eb7.tar.xz
Update mypy configuration: `no_implicit_optional = True` (#9742)
Diffstat (limited to 'synapse/util')
-rw-r--r--synapse/util/caches/deferred_cache.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/synapse/util/caches/deferred_cache.py b/synapse/util/caches/deferred_cache.py
index 1adc92eb90..dd392cf694 100644
--- a/synapse/util/caches/deferred_cache.py
+++ b/synapse/util/caches/deferred_cache.py
@@ -283,7 +283,9 @@ class DeferredCache(Generic[KT, VT]):
         # we return a new Deferred which will be called before any subsequent observers.
         return observable.observe()
 
-    def prefill(self, key: KT, value: VT, callback: Callable[[], None] = None):
+    def prefill(
+        self, key: KT, value: VT, callback: Optional[Callable[[], None]] = None
+    ):
         callbacks = [callback] if callback else []
         self.cache.set(key, value, callbacks=callbacks)