use PEP 589 syntax for TypeDict (#1253)

Use PEP 589 syntax for TypeDict annotation.

Also fixes previously broken typing MetaSchema typing implementation.

1 files changed, 12 insertions, 14 deletions

diff --git a/cloudinit/importer.py b/cloudinit/importer.py
index f84ff4da..2bc210dd 100644
--- a/cloudinit/importer.py
+++ b/cloudinit/importer.py
@@ -12,21 +12,19 @@ import sys
 import typing
 
 # annotations add value for development, but don't break old versions
-# pyver: 3.5 -> 3.8
+# pyver: 3.6 -> 3.8
 # pylint: disable=E1101
-if sys.version_info >= (3, 8) and hasattr(typing, "TypeDict"):
-    MetaSchema = typing.TypedDict(
-        "MetaSchema",
-        {
-            "name": str,
-            "id": str,
-            "title": str,
-            "description": str,
-            "distros": typing.List[str],
-            "examples": typing.List[str],
-            "frequency": str,
-        },
-    )
+if sys.version_info >= (3, 8):
+
+    class MetaSchema(typing.TypedDict):
+        name: str
+        id: str
+        title: str
+        description: str
+        distros: typing.List[str]
+        examples: typing.List[str]
+        frequency: str
+
 else:
     MetaSchema = dict
 # pylint: enable=E1101