fix py37 syntax

Author: blink1073

docs/conf.py

@@ -14,7 +14,7 @@
 
 import os
 import shutil
-from typing import Dict, Any, List
+from typing import Any, Dict, List
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the

ipykernel/inprocess/channels.py

@@ -3,9 +3,10 @@
 # Copyright (c) IPython Development Team.
 # Distributed under the terms of the Modified BSD License.
 
-from jupyter_client.channelsabc import HBChannelABC
 from typing import List
 
+from jupyter_client.channelsabc import HBChannelABC
+
 # -----------------------------------------------------------------------------
 # Channel classes
 # -----------------------------------------------------------------------------

ipykernel/iostream.py

@@ -13,7 +13,7 @@
 from binascii import b2a_hex
 from collections import deque
 from io import StringIO, TextIOBase
-from typing import Any, Optional, Callable
+from typing import Any, Callable, Optional
 from weakref import WeakSet
 
 import zmq

ipykernel/kernelapp.py

@@ -465,7 +465,8 @@ def init_io(self):
 
                         handler.stream = TextIOWrapper(
                             FileIO(
-                                sys.stderr._original_stdstream_copy, "w"  # type:ignore[attr-defined]
+                                sys.stderr._original_stdstream_copy,
+                                "w",  # type:ignore[attr-defined]
                             )
                         )
         if self.displayhook_class: