Update type comments to type annotations (#568)

Author: terencehonles

.github/workflows/ci.yml

@@ -179,6 +179,6 @@ jobs:
         run: |
           if ! towncrier check; then
             echo ''
-            echo "Please add a description of your changes to 'changelog.d/{issue or PR number}.{feature,bugfix,removal}'"
+            echo "Please add a description of your changes to 'changelog.d/{issue or PR number}.{feature,bugfix,misc,doc,removal}'"
             exit 1
           fi

changelog.d/568.misc

@@ -0,0 +1 @@
+Update type comments to type annotations.

django_redis/client/default.py

@@ -42,7 +42,7 @@ def __init__(self, server, params: Dict[str, Any], backend: BaseCache) -> None:
         if not isinstance(self._server, (list, tuple, set)):
             self._server = self._server.split(",")
 
-        self._clients = [None] * len(self._server)  # type: List[Optional[Redis]]
+        self._clients: List[Optional[Redis]] = [None] * len(self._server)
         self._options = params.get("OPTIONS", {})
         self._replica_read_only = self._options.get("REPLICA_READ_ONLY", True)
 
@@ -146,7 +146,7 @@ def set(
             timeout = self._backend.default_timeout
 
         original_client = client
-        tried = []  # type: List[int]
+        tried: List[int] = []
         while True:
             try:
                 if client is None:

django_redis/hash_ring.py

@@ -4,7 +4,7 @@
 
 
 class HashRing:
-    nodes = []  # type: List[str]
+    nodes: List[str] = []
 
     def __init__(self, nodes: Iterable[str] = (), replicas: int = 128) -> None:
         self.replicas: int = replicas

django_redis/pool.py

@@ -17,7 +17,7 @@ class ConnectionFactory:
     # ConnectionFactory is instantiated, as Django creates new cache client
     # (DefaultClient) instance for every request.
 
-    _pools = {}  # type: Dict[str, Redis]
+    _pools: Dict[str, Redis] = {}
 
     def __init__(self, options):
         pool_cls_path = options.get(