[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

ipykernel/eventloops.py

@@ -6,10 +6,10 @@
 import os
 import platform
 import sys
-from pkg_resources import parse_version as V
 from functools import partial
 
 import zmq
+from pkg_resources import parse_version as V
 from traitlets.config.application import Application
 
 

ipykernel/tests/conftest.py

@@ -1,4 +1,3 @@
-
 try:
     import resource
 except ImportError:

ipykernel/tests/test_embed_kernel.py

@@ -77,7 +77,7 @@ def connection_file_ready(connection_file):
         kernel.terminate()
         kernel.wait()
         # Make sure all the fds get closed.
-        for attr in ['stdout', 'stderr', 'stdin']:
+        for attr in ["stdout", "stderr", "stdin"]:
             fid = getattr(kernel, attr)
             if fid:
                 fid.close()

ipykernel/tests/test_message_spec.py

@@ -5,12 +5,22 @@
 
 import re
 import sys
-from pkg_resources import parse_version as V
 from queue import Empty
 
 import jupyter_client
 import pytest
-from traitlets import Bool, Dict, Enum, HasTraits, Integer, List, TraitError, Unicode, observe
+from pkg_resources import parse_version as V
+from traitlets import (
+    Bool,
+    Dict,
+    Enum,
+    HasTraits,
+    Integer,
+    List,
+    TraitError,
+    Unicode,
+    observe,
+)
 
 from .utils import TIMEOUT, execute, flush_channels, get_reply, start_global_kernel
 
@@ -98,9 +108,9 @@ class MimeBundle(Reference):
     metadata = Dict()
     data = Dict()
 
-    @observe('data')
+    @observe("data")
     def _on_data_changed(self, change):
-        for k, v in change['new'].items():
+        for k, v in change["new"].items():
             assert mime_pat.match(k)
             assert isinstance(v, str)
 

ipykernel/tests/test_pickleutil.py

@@ -1,7 +1,6 @@
 import pickle
 import warnings
 
-
 with warnings.catch_warnings():
     warnings.simplefilter("ignore")
     from ipykernel.pickleutil import can, uncan

setup.py

@@ -71,7 +71,7 @@ def run(self):
         'appnope;platform_system=="Darwin"',
         "psutil",
         "nest_asyncio",
-        "setuptools>=60"  # for pkg_resources
+        "setuptools>=60",  # for pkg_resources
     ],
     extras_require={
         "test": [