Use typing_extensions for TypedDict

poezio/core/command_defs.py

+from typing import Callable, List
+
 from poezio.core.commands import CommandCore
 from poezio.core.completions import CompletionCore
 from poezio.plugin_manager import PluginManager
 
-from typing import TypedDict, Callable, List
+
+try:
+    from typing_extensions import TypedDict
+except ImportError:
+    from sys import version_info
+    if version_info < (3, 9):
+        raise
+    from typing import TypedDict
+
 
 CommandDict = TypedDict(
     "CommandDict",

requirements.txt

@@ -4,3 +4,4 @@ aiodns==1.1.1
 pycares==2.3.0
 pyasn1==0.4.2
 pyasn1-modules==0.2.1
+typing_extensions

setup.py

@@ -165,7 +165,7 @@ setup(
         + find_doc('share/doc/poezio/html', 'build/html')
         + sphinx_files_found
     ),
-    install_requires=['slixmpp>=1.6.0', 'aiodns', 'pyasn1_modules', 'pyasn1'],
+    install_requires=['slixmpp>=1.6.0', 'aiodns', 'pyasn1_modules', 'pyasn1', 'typing_extensions'],
     extras_require={'OTR plugin': 'python-potr>=1.0',
         'Screen autoaway plugin': 'pyinotify==0.9.4',
         'Avoiding cython': 'cffi'},