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

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

ci/check_sdist.py

@@ -3,7 +3,6 @@
 
 import sys
 import tarfile
-from tarfile import TarFile
 
 expected_files = [
     "docs/requirements.txt",

docs/generate-metrics.py

@@ -1,5 +1,4 @@
 import os
-from os.path import join
 
 from pytablewriter import RstSimpleTableWriter
 from pytablewriter.style import Style

jupyterhub/alembic/versions/19c0846f6344_base_revision_for_0_5.py

@@ -11,8 +11,6 @@ down_revision = None
 branch_labels = None
 depends_on = None
 
-import sqlalchemy as sa
-from alembic import op
 
 def upgrade():
     pass

jupyterhub/apihandlers/hub.py

@@ -5,7 +5,6 @@ import json
 import sys
 
 from tornado import web
-from tornado.ioloop import IOLoop
 
 from .._version import __version__
 from ..scopes import needs_scope

jupyterhub/auth.py

@@ -776,8 +776,6 @@ def _deprecated_method(old_name, new_name, version):
     return deprecated
 
 
-import types
-
 # deprecate white/blacklist method names
 for _old_name, _new_name, _version in [
     ("check_whitelist", "check_allowed", "1.2"),

jupyterhub/oauth/provider.py

@@ -13,7 +13,6 @@ from ..scopes import (
     _check_scopes_exist,
     _resolve_requested_scopes,
     access_scopes,
-    expand_scopes,
     identify_scopes,
 )
 from ..utils import compare_token, hash_token

jupyterhub/orm.py

@@ -35,7 +35,6 @@ from sqlalchemy.orm import (
     sessionmaker,
 )
 from sqlalchemy.pool import StaticPool
-from sqlalchemy.sql.expression import bindparam
 from sqlalchemy.types import LargeBinary, Text, TypeDecorator
 from tornado.log import app_log
 
@@ -996,7 +995,6 @@ def check_db_revision(engine):
     ).first()[0]
     if alembic_revision == head:
         app_log.debug("database schema version found: %s", alembic_revision)
-        pass
     else:
         raise DatabaseSchemaMismatch(
             "Found database schema version {found} != {head}. "

jupyterhub/proxy.py

@@ -250,14 +250,12 @@ class Proxy(LoggingConfigurable):
         The proxy implementation should also have a way to associate the fact that a
         route came from JupyterHub.
         """
-        pass
 
     async def delete_route(self, routespec):
         """Delete a route with a given routespec if it exists.
 
         **Subclasses must define this method**
         """
-        pass
 
     async def get_all_routes(self):
         """Fetch and return all the routes associated by JupyterHub from the
@@ -274,7 +272,6 @@ class Proxy(LoggingConfigurable):
             'data': the attached data dict for this route (as specified in add_route)
           }
         """
-        pass
 
     async def get_route(self, routespec):
         """Return the route info for a given routespec.
@@ -683,7 +680,6 @@ class ConfigurableHTTPProxy(Proxy):
             os.remove(self.pid_file)
         except FileNotFoundError:
             self.log.debug("PID file %s already removed", self.pid_file)
-            pass
 
     def _get_ssl_options(self):
         """List of cmd proxy options to use internal SSL"""

jupyterhub/services/auth.py

@@ -35,7 +35,6 @@ import string
 import time
 import uuid
 import warnings
-from functools import partial
 from http import HTTPStatus
 from unittest import mock
 from urllib.parse import urlencode

jupyterhub/singleuser/mixins.py

@@ -14,7 +14,6 @@ import logging
 import os
 import random
 import secrets
-import ssl
 import sys
 import warnings
 from datetime import timezone

jupyterhub/spawner.py

@@ -896,7 +896,6 @@ class Spawner(LoggingConfigurable):
         Override in subclasses to restore any extra state that is needed to track
         the single-user server for that user. Subclasses should call super().
         """
-        pass
 
     def get_state(self):
         """Save state of spawner into database.
@@ -1341,7 +1340,6 @@ class Spawner(LoggingConfigurable):
 
         Stopping a server does *not* call this method.
         """
-        pass
 
     def add_poll_callback(self, callback, *args, **kwargs):
         """Add a callback to fire when the single-user server stops"""

jupyterhub/tests/conftest.py

@@ -27,7 +27,6 @@ Fixtures to add functionality or spawning behavior
 # Distributed under the terms of the Modified BSD License.
 import asyncio
 import copy
-import inspect
 import os
 import sys
 from functools import partial
@@ -36,7 +35,6 @@ from subprocess import TimeoutExpired
 from unittest import mock
 
 from pytest import fixture, raises
-from tornado import ioloop
 from tornado.httpclient import HTTPError
 from tornado.platform.asyncio import AsyncIOMainLoop
 

jupyterhub/tests/mocking.py

@@ -36,7 +36,6 @@ from unittest import mock
 from urllib.parse import urlparse
 
 from pamela import PAMError
-from tornado.ioloop import IOLoop
 from traitlets import Bool, Dict, default
 
 from .. import metrics, orm, roles

jupyterhub/tests/populate_db.py

@@ -4,7 +4,6 @@ Run with old versions of jupyterhub to test upgrade/downgrade
 
 used in test_db.py
 """
-import os
 from datetime import datetime
 from functools import partial
 

jupyterhub/tests/selenium/conftest.py

@@ -1,6 +1,5 @@
 import pytest
 from selenium import webdriver
-from selenium.webdriver.firefox.options import Options as FirefoxOptions
 
 
 @pytest.fixture()

jupyterhub/tests/selenium/test_browser.py

@@ -1,21 +1,14 @@
 import asyncio
-import time
 from functools import partial
 
 import pytest
-from selenium import webdriver
-from selenium.common.exceptions import NoSuchElementException, TimeoutException
-from selenium.webdriver.common.by import By
+from selenium.common.exceptions import NoSuchElementException
 from selenium.webdriver.support import expected_conditions as EC
 from selenium.webdriver.support.ui import WebDriverWait
 from tornado.escape import url_escape
 from tornado.httputil import url_concat
 
-from jupyterhub.tests.selenium.locators import (
-    HomePageLocators,
-    LoginPageLocators,
-    TokenPageLocators,
-)
+from jupyterhub.tests.selenium.locators import LoginPageLocators
 from jupyterhub.utils import exponential_backoff
 
 from ...utils import url_path_join

jupyterhub/tests/test_auth_expiry.py

@@ -7,7 +7,6 @@ authentication can expire in a number of ways:
 - doesn't need refresh
 - needs refresh and cannot be refreshed without new login
 """
-from contextlib import contextmanager
 from unittest import mock
 from urllib.parse import parse_qs, urlparse
 

jupyterhub/tests/test_eventlog.py

@@ -14,8 +14,6 @@ import jsonschema
 import pytest
 from traitlets.config import Config
 
-from .mocking import MockHub
-
 # To test new schemas, add them to the `valid_events`
 # and `invalid_events` dictionary below.
 

jupyterhub/tests/test_orm.py

@@ -7,7 +7,6 @@ from datetime import datetime, timedelta
 from unittest import mock
 
 import pytest
-from tornado import gen
 
 from .. import crypto, objects, orm, roles
 from ..emptyclass import EmptyClass

jupyterhub/tests/test_services.py

@@ -6,8 +6,6 @@ from subprocess import Popen
 
 from async_generator import asynccontextmanager
 
-from .. import orm
-from ..roles import roles_to_scopes
 from ..utils import (
     exponential_backoff,
     maybe_future,

jupyterhub/tests/test_singleuser.py

@@ -1,7 +1,7 @@
 """Tests for jupyterhub.singleuser"""
 import os
 import sys
-from contextlib import contextmanager, nullcontext
+from contextlib import nullcontext
 from subprocess import CalledProcessError, check_output
 from unittest import mock
 from urllib.parse import urlencode, urlparse

jupyterhub/utils.py

@@ -527,7 +527,6 @@ def print_stacks(file=sys.stderr):
     """
     # local imports because these will not be used often,
     # no need to add them to startup
-    import asyncio
     import traceback
 
     from .log import coroutine_frames