zerver core: Remove unused imports.

Signed-off-by: Anders Kaseorg <andersk@mit.edu>

zerver/context_processors.py

@@ -1,5 +1,5 @@
 
-from typing import Any, Dict, List, Optional
+from typing import Any, Dict, Optional
 from django.http import HttpRequest
 from django.conf import settings
 

zerver/decorator.py

@@ -2,7 +2,6 @@
 import django_otp
 from two_factor.utils import default_device
 from django_otp import user_has_device, _user_is_authenticated
-from django_otp.conf import settings as otp_settings
 
 from django.contrib.auth.decorators import user_passes_test as django_user_passes_test
 from django.contrib.auth.models import AnonymousUser
@@ -29,8 +28,7 @@ from zerver.lib.types import ViewFuncT
 
 from zerver.lib.rate_limiter import incr_ratelimit, is_ratelimited, \
     api_calls_left, RateLimitedUser, RateLimiterLockingException
-from zerver.lib.request import REQ, has_request_variables, JsonableError, RequestVariableMissingError
-from django.core.handlers import base
+from zerver.lib.request import REQ, has_request_variables, RequestVariableMissingError
 
 from functools import wraps
 import base64
@@ -40,7 +38,7 @@ import logging
 from io import BytesIO
 import urllib
 
-from typing import Union, Any, Callable, Sequence, Dict, Optional, TypeVar, Tuple, cast
+from typing import Union, Any, Callable, Dict, Optional, TypeVar, Tuple
 from zerver.lib.logging_util import log_to_file
 
 # This is a hack to ensure that RemoteZulipServer always exists even

zerver/forms.py

@@ -7,10 +7,8 @@ from django.contrib.auth.forms import SetPasswordForm, AuthenticationForm, \
 from django.core.exceptions import ValidationError
 from django.urls import reverse
 from django.core.validators import validate_email
-from django.db.models.query import QuerySet
 from django.utils.translation import ugettext as _
 from django.contrib.auth.tokens import default_token_generator
-from django.contrib.sites.shortcuts import get_current_site
 from django.utils.http import urlsafe_base64_encode
 from django.utils.encoding import force_bytes
 from django.contrib.auth.tokens import PasswordResetTokenGenerator
@@ -22,7 +20,7 @@ from zerver.lib.actions import do_change_password, email_not_system_bot, \
 from zerver.lib.name_restrictions import is_reserved_subdomain, is_disposable_domain
 from zerver.lib.request import JsonableError
 from zerver.lib.send_email import send_email, FromAddress
-from zerver.lib.subdomains import get_subdomain, user_matches_subdomain, is_root_domain_available
+from zerver.lib.subdomains import get_subdomain, is_root_domain_available
 from zerver.lib.users import check_full_name
 from zerver.models import Realm, get_user_by_delivery_email, UserProfile, get_realm, \
     email_to_domain, \
@@ -34,7 +32,7 @@ import logging
 import re
 import DNS
 
-from typing import Any, Callable, List, Optional, Dict
+from typing import Any, List, Optional, Dict
 from two_factor.forms import AuthenticationTokenForm as TwoFactorAuthenticationTokenForm
 from two_factor.utils import totp_digits
 

zerver/lib/actions.py

@@ -1,6 +1,6 @@
 from typing import (
-    AbstractSet, Any, AnyStr, Callable, Dict, Iterable, List, Mapping, MutableMapping,
-    Optional, Sequence, Set, Tuple, TypeVar, Union, cast
+    AbstractSet, Any, Callable, Dict, Iterable, List, Mapping, MutableMapping,
+    Optional, Sequence, Set, Tuple, Union, cast
 )
 from mypy_extensions import TypedDict
 
@@ -77,7 +77,6 @@ from zerver.lib.users import (
     check_bot_name_available,
     check_full_name,
     get_api_key,
-    user_ids_to_users
 )
 from zerver.lib.user_status import (
     update_user_status,
@@ -88,10 +87,10 @@ from zerver.models import Realm, RealmEmoji, Stream, UserProfile, UserActivity,
     RealmDomain, Service, SubMessage, \
     Subscription, Recipient, Message, Attachment, UserMessage, RealmAuditLog, \
     UserHotspot, MultiuseInvite, ScheduledMessage, UserStatus, \
-    Client, DefaultStream, DefaultStreamGroup, UserPresence, PushDeviceToken, \
+    Client, DefaultStream, DefaultStreamGroup, UserPresence, \
     ScheduledEmail, MAX_TOPIC_NAME_LENGTH, \
-    MAX_MESSAGE_LENGTH, get_client, get_stream, get_personal_recipient, get_huddle, \
-    get_user_profile_by_id, PreregistrationUser, get_display_recipient, \
+    MAX_MESSAGE_LENGTH, get_client, get_stream, get_personal_recipient, \
+    get_user_profile_by_id, PreregistrationUser, \
     get_realm, bulk_get_recipients, get_stream_recipient, get_stream_recipients, \
     email_allowed_for_realm, email_to_username, display_recipient_cache_key, \
     get_user_by_delivery_email, get_stream_cache_key, active_non_guest_user_ids, \
@@ -101,7 +100,7 @@ from zerver.models import Realm, RealmEmoji, Stream, UserProfile, UserActivity,
     Reaction, EmailChangeStatus, CustomProfileField, \
     custom_profile_fields_for_realm, get_huddle_user_ids, \
     CustomProfileFieldValue, validate_attachment_request, get_system_bot, \
-    get_display_recipient_by_id, query_for_ids, get_huddle_recipient, \
+    query_for_ids, get_huddle_recipient, \
     UserGroup, UserGroupMembership, get_default_stream_groups, \
     get_bot_services, get_bot_dicts_in_realm, DomainNotAllowedForRealmError, \
     DisposableEmailError, EmailContainsPlusError, \
@@ -130,23 +129,21 @@ from zerver.lib.utils import generate_api_key
 from zerver.lib.create_user import create_user
 from zerver.lib import bugdown
 from zerver.lib.cache import cache_with_key, cache_set, \
-    user_profile_by_email_cache_key, user_profile_cache_key, \
+    user_profile_by_email_cache_key, \
     cache_set_many, cache_delete, cache_delete_many
 from zerver.decorator import statsd_increment
 from zerver.lib.utils import log_statsd_event, statsd
-from zerver.lib.html_diff import highlight_html_differences
 from zerver.lib.i18n import get_language_name
-from zerver.lib.alert_words import user_alert_words, add_user_alert_words, \
+from zerver.lib.alert_words import add_user_alert_words, \
     remove_user_alert_words, set_user_alert_words
 from zerver.lib.notifications import clear_scheduled_emails, \
     clear_scheduled_invitation_emails, enqueue_welcome_emails
-from zerver.lib.narrow import check_supported_events_narrow_filter
 from zerver.lib.exceptions import JsonableError, ErrorCode, BugdownRenderingException
 from zerver.lib.sessions import delete_user_sessions
 from zerver.lib.upload import attachment_url_re, attachment_url_to_path_id, \
     claim_attachment, delete_message_image, upload_emoji_image, delete_avatar_image
 from zerver.lib.video_calls import request_zoom_video_call_url
-from zerver.tornado.event_queue import request_event_queue, send_event
+from zerver.tornado.event_queue import send_event
 from zerver.lib.types import ProfileFieldData
 
 from analytics.models import StreamCount

zerver/lib/addressee.py

@@ -1,10 +1,8 @@
 
 from typing import Iterable, List, Optional, Sequence, Union, cast
 
-from django.core.exceptions import ValidationError
 from django.utils.translation import ugettext as _
 from zerver.lib.exceptions import JsonableError
-from zerver.lib.request import JsonableError
 from zerver.models import (
     Realm,
     UserProfile,

zerver/lib/api_test_helpers.py

@@ -1,5 +1,4 @@
 from typing import Dict, Any, Optional, Iterable
-from io import StringIO
 
 import json
 import os

zerver/lib/bot_lib.py

@@ -1,27 +1,18 @@
 import json
-import logging
 import os
-import signal
-import sys
-import time
-import re
 import importlib
 from zerver.lib.actions import internal_send_private_message, \
     internal_send_stream_message, internal_send_huddle_message
 from zerver.models import UserProfile, get_active_user
 from zerver.lib.bot_storage import get_bot_storage, set_bot_storage, \
-    is_key_in_bot_storage, get_bot_storage_size, remove_bot_storage
+    is_key_in_bot_storage, remove_bot_storage
 from zerver.lib.bot_config import get_bot_config, ConfigError
 from zerver.lib.integrations import EMBEDDED_BOTS
 from zerver.lib.topic import get_topic_from_message_info
 
 from django.utils.translation import ugettext as _
 
-import configparser
-
-from mypy_extensions import NoReturn
-from typing import Any, Optional, List, Dict
-from types import ModuleType
+from typing import Any, Dict
 
 our_dir = os.path.dirname(os.path.abspath(__file__))
 

zerver/lib/bulk_create.py

@@ -1,8 +1,8 @@
-from typing import Any, Dict, Iterable, List, Mapping, Optional, Set, Tuple
+from typing import Any, Dict, List, Optional, Set, Tuple
 
 from zerver.lib.initial_password import initial_password
-from zerver.models import Realm, Stream, UserProfile, Huddle, \
-    Subscription, Recipient, Client, RealmAuditLog, get_huddle_hash
+from zerver.models import Realm, Stream, UserProfile, \
+    Subscription, Recipient, RealmAuditLog
 from zerver.lib.create_user import create_user_profile
 from zerver.lib.bugdown import convert as bugdown_convert
 

zerver/lib/cache.py

@@ -8,9 +8,8 @@ from django.conf import settings
 from django.db.models import Q
 from django.core.cache.backends.base import BaseCache
 from django.http import HttpRequest
-from django import template
 
-from typing import cast, Any, Callable, Dict, Iterable, List, Optional, Union, Set, TypeVar, Tuple
+from typing import Any, Callable, Dict, Iterable, List, Optional, TypeVar, Tuple
 
 from zerver.lib.utils import statsd, statsd_key, make_safe_digest
 import time

zerver/lib/cache_helpers.py

@@ -13,7 +13,7 @@ from django.conf import settings
 from zerver.models import Message, UserProfile, Stream, get_stream_cache_key, \
     Recipient, get_recipient_cache_key, Client, get_client_cache_key, \
     Huddle, huddle_hash_cache_key
-from zerver.lib.cache import cache_with_key, cache_set, \
+from zerver.lib.cache import \
     user_profile_by_api_key_cache_key, \
     user_profile_cache_key, get_remote_cache_time, get_remote_cache_requests, \
     cache_set_many, to_dict_cache_key_id

zerver/lib/create_user.py

@@ -6,10 +6,7 @@ from zerver.lib.upload import copy_avatar
 from zerver.lib.hotspots import copy_hotpots
 from zerver.lib.utils import generate_api_key
 
-import base64
 import ujson
-import os
-import string
 
 from typing import Optional
 

zerver/lib/digest.py

@@ -1,4 +1,4 @@
-from typing import Any, Callable, Dict, Iterable, List, Set, Tuple, Union
+from typing import Any, Dict, List, Set, Tuple, Union
 
 from collections import defaultdict
 import datetime
@@ -6,7 +6,6 @@ import logging
 import pytz
 
 from django.db.models import Q, QuerySet
-from django.template import loader
 from django.conf import settings
 from django.utils.timezone import now as timezone_now
 
@@ -14,7 +13,7 @@ from confirmation.models import one_click_unsubscribe_link
 from zerver.lib.notifications import build_message_list
 from zerver.lib.send_email import send_future_email, FromAddress
 from zerver.lib.url_encoding import encode_stream
-from zerver.models import UserProfile, UserMessage, Recipient, Stream, \
+from zerver.models import UserProfile, UserMessage, Recipient, \
     Subscription, UserActivity, get_active_streams, get_user_profile_by_id, \
     Realm, Message
 from zerver.context_processors import common_context

zerver/lib/email_mirror.py

@@ -1,4 +1,4 @@
-from typing import Any, Dict, List, Optional, Union, cast
+from typing import Any, Dict, Optional
 
 import logging
 import re
@@ -21,8 +21,7 @@ from zerver.lib.utils import generate_random_token
 from zerver.lib.send_email import FromAddress
 from zerver.models import Stream, Recipient, \
     get_user_profile_by_id, get_display_recipient, get_personal_recipient, \
-    Message, Realm, UserProfile, get_system_bot, get_user, MAX_TOPIC_NAME_LENGTH, \
-    MAX_MESSAGE_LENGTH
+    Message, Realm, UserProfile, get_system_bot, get_user
 
 logger = logging.getLogger(__name__)
 

zerver/lib/error_notify.py

@@ -1,13 +1,11 @@
 # System documented in https://zulip.readthedocs.io/en/latest/subsystems/logging.html
 
-import logging
-
 from collections import defaultdict
 from django.conf import settings
 from django.core.mail import mail_admins
 from django.http import HttpResponse
 from django.utils.translation import ugettext as _
-from typing import cast, Any, Dict, Optional
+from typing import Any, Dict, Optional
 
 from zerver.filters import clean_data_from_query_parameters
 from zerver.models import get_system_bot

zerver/lib/events.py

@@ -2,20 +2,18 @@
 # high-level documentation on how this system works.
 
 import copy
-import ujson
 
 from collections import defaultdict
 from django.utils.translation import ugettext as _
 from django.conf import settings
 from importlib import import_module
 from typing import (
-    cast, Any, Callable, Dict, Iterable, List, Optional, Sequence, Set, Tuple, Union
+    Any, Callable, Dict, Iterable, Optional, Sequence, Set
 )
 
 session_engine = import_module(settings.SESSION_ENGINE)
 
 from zerver.lib.alert_words import user_alert_words
-from zerver.lib.attachments import user_attachments
 from zerver.lib.avatar import avatar_url, get_avatar_field
 from zerver.lib.bot_config import load_bot_config_template
 from zerver.lib.hotspots import get_next_hotspots
@@ -35,7 +33,6 @@ from zerver.lib.request import JsonableError
 from zerver.lib.topic import TOPIC_NAME
 from zerver.lib.topic_mutes import get_topic_mutes
 from zerver.lib.actions import (
-    validate_user_access_to_subscribers_helper,
     do_get_streams, get_default_streams_for_realm,
     gather_subscriptions_helper, get_cross_realm_dicts,
     get_status_dict, streams_to_dicts_sorted,

zerver/lib/exceptions.py

@@ -1,5 +1,5 @@
 from enum import Enum
-from typing import Any, Dict, List, Optional, Type
+from typing import Any, Dict, List, Type
 from mypy_extensions import NoReturn
 
 from django.core.exceptions import PermissionDenied

zerver/lib/feedback.py

@@ -6,8 +6,7 @@ from typing import Any, Mapping, Optional
 from zerver.lib.actions import internal_send_message
 from zerver.lib.send_email import FromAddress
 from zerver.lib.redis_utils import get_redis_client
-from zerver.models import get_realm, get_system_bot, \
-    UserProfile, Realm
+from zerver.models import get_system_bot
 
 import time
 

zerver/lib/generate_test_data.py

@@ -1,7 +1,7 @@
 import itertools
 import ujson
 import random
-from typing import List, Dict, Any, Optional
+from typing import List, Dict, Any
 
 def load_config() -> Dict[str, Any]:
     with open("zerver/tests/fixtures/config.generate_data.json", "r") as infile:

zerver/lib/integrations.py

@@ -1,16 +1,12 @@
 import os
 import pathlib
 
-from typing import Dict, List, Optional, TypeVar, Any
+from typing import Dict, List, Optional, Any
 from django.conf import settings
 from django.conf.urls import url
 from django.urls.resolvers import LocaleRegexProvider
 from django.utils.module_loading import import_string
-from django.utils.safestring import mark_safe
 from django.utils.translation import ugettext as _
-from django.template import loader
-
-from zerver.templatetags.app_filters import render_markdown_path
 
 
 """This module declares all of the (documented) integrations available

zerver/lib/json_encoder_for_html.py

@@ -1,5 +1,5 @@
 import json
-from typing import Any, Dict, Iterator, Optional
+from typing import Any, Iterator
 
 # Taken from
 # https://github.com/simplejson/simplejson/blob/8edc82afcf6f7512b05fba32baa536fe756bd273/simplejson/encoder.py#L378-L402

zerver/lib/management.py

@@ -1,6 +1,5 @@
 # Library code for use in management commands
 
-import sys
 import time
 
 from argparse import ArgumentParser, RawTextHelpFormatter

zerver/lib/mdiff.py

@@ -1,7 +1,6 @@
 import os
 import subprocess
 import logging
-import difflib
 
 class DiffException(Exception):
     pass

zerver/lib/message.py

@@ -16,7 +16,6 @@ from zerver.lib.cache import (
     generic_bulk_cached_fetch,
     to_dict_cache_key,
     to_dict_cache_key_id,
-    cache_set,
 )
 from zerver.lib.request import JsonableError
 from zerver.lib.stream_subscription import (

zerver/lib/migrate.py

@@ -1,8 +1,6 @@
-from django.db.models.query import QuerySet
 from psycopg2.extensions import cursor
-from typing import Any, Callable, Dict, List, Tuple, TypeVar
+from typing import List, TypeVar
 
-import re
 import time
 
 CursorObj = TypeVar('CursorObj', bound=cursor)

zerver/lib/notifications.py

@@ -1,11 +1,9 @@
 
-from typing import cast, Any, Dict, Iterable, List, Mapping, Optional, Sequence, Tuple
+from typing import Any, Dict, Iterable, List, Optional, Tuple
 
-from confirmation.models import Confirmation, one_click_unsubscribe_link
+from confirmation.models import one_click_unsubscribe_link
 from django.conf import settings
-from django.template import loader
 from django.utils.timezone import now as timezone_now
-from django.utils.translation import ugettext as _
 from django.contrib.auth import get_backends
 from django_auth_ldap.backend import LDAPBackend
 
@@ -22,21 +20,18 @@ from zerver.models import (
     Stream,
     get_display_recipient,
     UserProfile,
-    get_user,
     get_user_profile_by_id,
     receives_offline_email_notifications,
     get_context_for_message,
     Message,
-    Realm,
 )
 
-from datetime import timedelta, datetime
+from datetime import timedelta
 from email.utils import formataddr
 from lxml.cssselect import CSSSelector
 import lxml.html
 import re
 import subprocess
-import ujson
 from collections import defaultdict
 import pytz
 
@@ -529,7 +524,7 @@ def enqueue_welcome_emails(user: UserProfile, realm_creation: bool=False) -> Non
     else:
         context['getting_started_link'] = "https://zulipchat.com"
 
-    from zproject.backends import email_belongs_to_ldap, require_email_format_usernames
+    from zproject.backends import email_belongs_to_ldap
 
     if email_belongs_to_ldap(user.realm, user.email):
         context["ldap"] = True

zerver/lib/onboarding.py

@@ -1,12 +1,12 @@
 
 from django.conf import settings
 
-from zerver.lib.actions import set_default_streams, bulk_add_subscriptions, \
+from zerver.lib.actions import set_default_streams, \
     internal_prep_stream_message, internal_send_private_message, \
-    create_stream_if_needed, create_streams_if_needed, do_send_messages, \
+    create_streams_if_needed, do_send_messages, \
     do_add_reaction_legacy, create_users, missing_any_realm_internal_bots
 from zerver.lib.topic import get_turtle_message
-from zerver.models import Realm, UserProfile, Message, Reaction, get_system_bot
+from zerver.models import Realm, UserProfile, get_system_bot
 
 from typing import Any, Dict, List, Mapping
 

zerver/lib/outgoing_webhook.py

@@ -1,24 +1,18 @@
-from typing import Any, AnyStr, Iterable, Dict, Tuple, Callable, Mapping, Optional
+from typing import Any, AnyStr, Dict, Optional
 
 import requests
 import json
-import sys
-import inspect
 import logging
-import re
-import urllib
-from functools import reduce
 from requests import Response
 
 from django.utils.translation import ugettext as _
 
-from zerver.models import Realm, UserProfile, get_user_profile_by_id, get_client, \
+from zerver.models import UserProfile, get_user_profile_by_id, get_client, \
     GENERIC_INTERFACE, Service, SLACK_INTERFACE, email_to_domain
 from zerver.lib.actions import check_send_message
 from zerver.lib.queue import retry_event
 from zerver.lib.topic import get_topic_from_message_info
 from zerver.lib.url_encoding import near_message_url
-from zerver.lib.validator import check_dict, check_string
 from zerver.decorator import JsonableError
 
 from version import ZULIP_VERSION

zerver/lib/push_notifications.py

@@ -2,15 +2,12 @@
 
 import base64
 import binascii
-from functools import partial
 import logging
 import lxml.html
-import os
 import re
 import time
-import random
 
-from typing import Any, Dict, List, Optional, SupportsInt, Tuple, Type, Union, cast
+from typing import Any, Dict, List, Optional, Tuple, Union, cast
 
 from django.conf import settings
 from django.db import IntegrityError, transaction
@@ -18,21 +15,17 @@ from django.utils.timezone import now as timezone_now
 from django.utils.translation import ugettext as _
 from gcm import GCM
 import requests
-import urllib
-import ujson
 
 from zerver.decorator import statsd_increment
 from zerver.lib.avatar import absolute_avatar_url
-from zerver.lib.exceptions import ErrorCode, JsonableError
+from zerver.lib.exceptions import JsonableError
 from zerver.lib.message import access_message, huddle_users
 from zerver.lib.queue import retry_event
-from zerver.lib.remote_server import send_to_push_bouncer, send_json_to_push_bouncer, \
-    PushNotificationBouncerException
-from zerver.lib.timestamp import datetime_to_timestamp, timestamp_to_datetime
-from zerver.lib.utils import generate_random_token
+from zerver.lib.remote_server import send_to_push_bouncer, send_json_to_push_bouncer
+from zerver.lib.timestamp import datetime_to_timestamp
 from zerver.models import PushDeviceToken, Message, Recipient, UserProfile, \
-    UserMessage, get_display_recipient, receives_offline_push_notifications, \
-    receives_online_notifications, receives_stream_notifications, get_user_profile_by_id, \
+    get_display_recipient, receives_offline_push_notifications, \
+    receives_online_notifications, get_user_profile_by_id, \
     ArchivedMessage
 
 logger = logging.getLogger(__name__)

zerver/lib/rate_limiter.py

@@ -1,7 +1,7 @@
 
 import os
 
-from typing import Any, Iterator, List, Optional, Tuple
+from typing import List, Optional, Tuple
 
 from django.conf import settings
 from zerver.lib.redis_utils import get_redis_client
@@ -10,7 +10,6 @@ from zerver.models import UserProfile
 
 import redis
 import time
-import logging
 
 # Implement a rate-limiting scheme inspired by the one described here, but heavily modified
 # http://blog.domaintools.com/2013/04/rate-limiting-with-redis/

zerver/lib/realm_icon.py

@@ -1,6 +1,6 @@
 from django.conf import settings
 
-from zerver.lib.avatar_hash import gravatar_hash, user_avatar_hash
+from zerver.lib.avatar_hash import gravatar_hash
 from zerver.lib.upload import upload_backend
 from zerver.models import Realm
 

zerver/lib/retention.py

@@ -2,7 +2,6 @@
 from datetime import timedelta
 
 from django.db import connection, transaction
-from django.forms.models import model_to_dict
 from django.utils.timezone import now as timezone_now
 from zerver.models import Realm, Message, UserMessage, ArchivedMessage, ArchivedUserMessage, \
     Attachment, ArchivedAttachment

zerver/lib/send_email.py

@@ -13,7 +13,7 @@ import logging
 import ujson
 
 import os
-from typing import Any, Dict, Iterable, List, Mapping, Optional, Tuple
+from typing import Any, Dict, List, Mapping, Optional, Tuple
 
 from zerver.lib.logging_util import log_to_file
 from confirmation.models import generate_key

zerver/lib/soft_deactivation.py

@@ -9,7 +9,7 @@ from django.utils.timezone import now as timezone_now
 from typing import DefaultDict, List, Union, Any
 
 from zerver.models import UserProfile, UserMessage, RealmAuditLog, \
-    Subscription, Message, Recipient, UserActivity, Realm
+    Subscription, Message, Recipient, UserActivity
 
 logger = logging.getLogger("zulip.soft_deactivation")
 log_to_file(logger, settings.SOFT_DEACTIVATION_LOG_PATH)

zerver/lib/statistics.py

@@ -1,9 +1,6 @@
 # -*- coding: utf-8 -*-
 
-from zerver.models import UserProfile, UserActivity, UserActivityInterval, Message
-
-from django.utils.timezone import utc
-from typing import Any, Dict, List, Sequence, Set
+from zerver.models import UserProfile, UserActivityInterval
 
 from datetime import datetime, timedelta
 

zerver/lib/stream_topic.py

@@ -1,4 +1,4 @@
-from typing import (Dict, List, Set)
+from typing import Set
 from django.db.models.query import QuerySet
 
 from zerver.lib.stream_subscription import (

zerver/lib/streams.py

@@ -1,7 +1,6 @@
 
 from typing import Any, Iterable, List, Mapping, Set, Tuple, Optional
 
-from django.http import HttpRequest, HttpResponse
 from django.utils.translation import ugettext as _
 
 from zerver.lib.actions import check_stream_name, create_streams_if_needed

zerver/lib/test_classes.py

@@ -1,6 +1,6 @@
 from contextlib import contextmanager
-from typing import (cast, Any, Callable, Dict, Iterable, Iterator, List, Mapping, Optional,
-                    Sized, Tuple, Union)
+from typing import (cast, Any, Dict, Iterable, Iterator, List, Optional,
+                    Tuple, Union)
 
 from django.apps import apps
 from django.db.migrations.state import StateApps
@@ -24,7 +24,7 @@ from zerver.lib.users import get_api_key
 
 from zerver.lib.actions import (
     check_send_message, create_stream_if_needed, bulk_add_subscriptions,
-    get_display_recipient, bulk_remove_subscriptions, do_create_user,
+    bulk_remove_subscriptions,
     check_send_stream_message, gather_subscriptions,
     get_default_value_for_history_public_to_subscribers,
 )
@@ -40,13 +40,13 @@ from zerver.lib.test_helpers import (
 from zerver.models import (
     get_stream,
     get_client,
+    get_display_recipient,
     get_user,
     get_realm,
     Client,
     Message,
     Realm,
     Recipient,
-    Service,
     Stream,
     Subscription,
     UserProfile,

zerver/lib/test_helpers.py

@@ -1,28 +1,23 @@
 from contextlib import contextmanager
 from typing import (
-    cast, Any, Callable, Dict, Generator, Iterable, Iterator, List, Mapping,
-    Optional, Set, Sized, Tuple, Union, IO, TypeVar
+    Any, Callable, Dict, Generator, Iterable, Iterator, List, Mapping,
+    Optional, Tuple, Union, IO, TypeVar
 )
 
 from django.core import signing
 from django.urls.resolvers import LocaleRegexURLResolver
 from django.conf import settings
-from django.test import TestCase, override_settings
-from django.test.client import (
-    BOUNDARY, MULTIPART_CONTENT, encode_multipart,
-)
+from django.test import override_settings
 from django.template import loader
 from django.http import HttpResponse, HttpResponseRedirect
-from django.db.utils import IntegrityError
 from django.db.migrations.state import StateApps
-from boto.s3.connection import Location, S3Connection
+from boto.s3.connection import S3Connection
 from boto.s3.bucket import Bucket
 
 import zerver.lib.upload
 from zerver.lib.upload import S3UploadBackend, LocalUploadBackend
 from zerver.lib.avatar import avatar_url
 from zerver.lib.cache import get_cache_backend
-from zerver.lib.initial_password import initial_password
 from zerver.lib.db import TimeTrackingCursor
 from zerver.lib import cache
 from zerver.tornado import event_queue
@@ -30,40 +25,29 @@ from zerver.tornado.handlers import allocate_handler_id
 from zerver.worker import queue_processors
 
 from zerver.lib.actions import (
-    check_send_message, create_stream_if_needed, bulk_add_subscriptions,
     get_stream_recipient,
 )
 
 from zerver.models import (
-    get_recipient,
     get_stream,
-    get_user,
     Client,
     Message,
-    Realm,
-    Recipient,
-    Stream,
     Subscription,
     UserMessage,
     UserProfile,
 )
 
-from zerver.lib.request import JsonableError
-
 if False:
     # Avoid an import cycle; we only need these for type annotations.
     from zerver.lib.test_classes import ZulipTestCase, MigrationsTestCase
 
 import collections
-import base64
 import mock
 import os
 import re
 import sys
 import time
 import ujson
-import unittest
-import urllib
 from moto import mock_s3_deprecated
 
 import fakeldap
@@ -581,9 +565,6 @@ def use_db_models(method: Callable[..., None]) -> Callable[..., None]:
             'zerver.lib.test_helpers',
             Client=Client,
             Message=Message,
-            Realm=Realm,
-            Recipient=Recipient,
-            Stream=Stream,
             Subscription=Subscription,
             UserMessage=UserMessage,
             UserProfile=UserProfile,
@@ -595,7 +576,6 @@ def use_db_models(method: Callable[..., None]) -> Callable[..., None]:
             Message=Message,
             Realm=Realm,
             Recipient=Recipient,
-            Service=Service,
             Stream=Stream,
             Subscription=Subscription,
             UserProfile=UserProfile,

zerver/lib/test_runner.py

@@ -2,8 +2,8 @@
 from functools import partial
 import random
 
-from typing import Any, Callable, Dict, Iterable, List, Optional, Set, Tuple, \
-    Type, cast, Union, TypeVar
+from typing import Any, Callable, Dict, List, Optional, Set, Tuple, \
+    Type, cast, TypeVar
 from unittest import loader, runner  # type: ignore  # Mypy cannot pick these up.
 from unittest.result import TestResult
 
@@ -21,15 +21,12 @@ from zerver.lib.rate_limiter import bounce_redis_key_prefix_for_testing
 from zerver.lib.test_classes import flush_caches_for_testing
 from zerver.lib.sqlalchemy_utils import get_sqlalchemy_connection
 from zerver.lib.test_helpers import (
-    get_all_templates, write_instrumentation_reports,
+    write_instrumentation_reports,
     append_instrumentation_data
 )
 
 import os
-import subprocess
-import sys
 import time
-import traceback
 import unittest
 
 from multiprocessing.sharedctypes import Synchronized

zerver/lib/upload.py

@@ -1,8 +1,7 @@
-from typing import Any, Dict, Mapping, Optional, Tuple
+from typing import Dict, Optional, Tuple
 
 from django.utils.translation import ugettext as _
 from django.conf import settings
-from django.template.defaultfilters import slugify
 from django.core.files import File
 from django.http import HttpRequest
 from django.db.models import Sum
@@ -17,7 +16,7 @@ from boto.s3.key import Key
 from boto.s3.connection import S3Connection
 from mimetypes import guess_type, guess_extension
 
-from zerver.models import get_user_profile_by_id, RealmEmoji
+from zerver.models import get_user_profile_by_id
 from zerver.models import Attachment
 from zerver.models import Realm, RealmEmoji, UserProfile, Message
 

zerver/lib/user_groups.py

@@ -1,11 +1,10 @@
 from __future__ import absolute_import
 
-from collections import defaultdict
 from django.db import transaction
 from django.utils.translation import ugettext as _
 from zerver.lib.exceptions import JsonableError
 from zerver.models import UserProfile, Realm, UserGroupMembership, UserGroup
-from typing import Dict, Iterable, List, Tuple, Any
+from typing import Dict, List, Any
 
 def access_user_group_by_id(user_group_id: int, user_profile: UserProfile) -> UserGroup:
     try:

zerver/lib/users.py

@@ -2,14 +2,13 @@ from typing import Dict, List, Optional, Union, cast
 
 from django.db.models.query import QuerySet
 from django.utils.translation import ugettext as _
-from django.conf import settings
 
 from zerver.lib.cache import generic_bulk_cached_fetch, user_profile_cache_key_id, \
     user_profile_by_id_cache_key
 from zerver.lib.request import JsonableError
 from zerver.lib.avatar import avatar_url
 from zerver.models import UserProfile, Service, Realm, \
-    get_user_profile_by_id, query_for_ids, get_user_profile_by_id_in_realm, \
+    get_user_profile_by_id_in_realm, \
     CustomProfileField
 
 from zulip_bots.custom_exceptions import ConfigValidationError

zerver/lib/utils.py

@@ -2,13 +2,11 @@
 
 from typing import Any, Callable, List, Optional, Sequence, TypeVar, Iterable, Set, Tuple
 import base64
-import errno
 import hashlib
 import heapq
 import itertools
 import os
 import string
-import sys
 from time import sleep
 from itertools import zip_longest
 

zerver/lib/validator.py

@@ -30,8 +30,7 @@ import ujson
 from django.utils.translation import ugettext as _
 from django.core.exceptions import ValidationError
 from django.core.validators import validate_email, URLValidator
-from typing import Callable, Iterable, Optional, Tuple, TypeVar, cast, \
-    Dict
+from typing import Iterable, Optional, Tuple, cast
 
 from datetime import datetime
 from zerver.lib.request import JsonableError

zerver/lib/webhooks/common.py

@@ -1,6 +1,5 @@
 from urllib.parse import unquote
 
-from django.conf import settings
 from django.http import HttpRequest
 from django.utils.translation import ugettext as _
 from typing import Optional
@@ -11,7 +10,7 @@ from zerver.lib.exceptions import StreamDoesNotExistError, JsonableError, \
     ErrorCode
 from zerver.lib.request import REQ, has_request_variables
 from zerver.lib.send_email import FromAddress
-from zerver.models import UserProfile, get_system_bot
+from zerver.models import UserProfile
 
 
 MISSING_EVENT_HEADER_MESSAGE = """

zerver/lib/widget.py

@@ -1,5 +1,4 @@
-from typing import MutableMapping, Any, Optional, List, Tuple
-from django.conf import settings
+from typing import MutableMapping, Any, Optional, Tuple
 
 import re
 import json

zerver/logging_handlers.py

@@ -8,10 +8,8 @@ import traceback
 from typing import Any, Dict, Optional
 
 from django.conf import settings
-from django.core import mail
 from django.http import HttpRequest
-from django.utils.log import AdminEmailHandler
-from django.views.debug import ExceptionReporter, get_exception_reporter_filter
+from django.views.debug import get_exception_reporter_filter
 
 from zerver.lib.logging_util import find_log_caller_module
 from zerver.lib.queue import queue_json_publish
@@ -113,7 +111,6 @@ class AdminNotifyHandler(logging.Handler):
             if record.exc_info:
                 stack_trace = ''.join(traceback.format_exception(*record.exc_info))
                 message = str(record.exc_info[1])
-                from zerver.lib.exceptions import BugdownRenderingException
                 is_bugdown_rendering_exception = record.msg.startswith('Exception in Markdown parser')
             else:
                 stack_trace = 'No stack trace available'

zerver/middleware.py

@@ -3,7 +3,7 @@ import cProfile
 import logging
 import time
 import traceback
-from typing import Any, AnyStr, Callable, Dict, \
+from typing import Any, AnyStr, Dict, \
     Iterable, List, MutableMapping, Optional
 
 from bs4 import BeautifulSoup
@@ -13,7 +13,7 @@ from django.contrib.sessions.middleware import SessionMiddleware
 from django.core.exceptions import DisallowedHost, SuspiciousOperation
 from django.db import connection
 from django.http import HttpRequest, HttpResponse, StreamingHttpResponse
-from django.shortcuts import redirect, render
+from django.shortcuts import render
 from django.utils.cache import patch_vary_headers
 from django.utils.deprecation import MiddlewareMixin
 from django.utils.http import cookie_date

zerver/models.py

@@ -1,11 +1,10 @@
 from typing import Any, DefaultDict, Dict, List, Set, Tuple, TypeVar, \
-    Union, Optional, Sequence, AbstractSet, Pattern, AnyStr, Callable, Iterable
+    Union, Optional, Sequence, AbstractSet, Callable, Iterable
 from typing.re import Match
 
 from django.db import models
-from django.db.models.query import QuerySet, F
-from django.db.models import Manager, CASCADE, Sum
-from django.db.models.functions import Length
+from django.db.models.query import QuerySet
+from django.db.models import Manager, CASCADE
 from django.conf import settings
 from django.contrib.auth.models import AbstractBaseUser, UserManager, \
     PermissionsMixin
@@ -30,27 +29,23 @@ from zerver.lib.timestamp import datetime_to_timestamp
 from django.db.models.signals import pre_save, post_save, post_delete
 from django.utils.translation import ugettext_lazy as _
 from zerver.lib import cache
-from zerver.lib.validator import check_int, check_float, \
+from zerver.lib.validator import check_int, \
     check_short_string, check_long_string, validate_choice_field, check_date, \
     check_url, check_list
 from zerver.lib.name_restrictions import is_disposable_domain
 from zerver.lib.types import Validator, ExtendedValidator, \
-    ProfileDataElement, ProfileData, FieldTypeData, FieldElement, \
+    ProfileDataElement, ProfileData, FieldTypeData, \
     RealmUserValidator
 
-from django.utils.encoding import force_text
-
 from bitfield import BitField
 from bitfield.types import BitHandler
 from collections import defaultdict, OrderedDict
 from datetime import timedelta
 import pylibmc
 import re
-import logging
 import sre_constants
 import time
 import datetime
-import sys
 
 MAX_TOPIC_NAME_LENGTH = 60
 MAX_MESSAGE_LENGTH = 10000

zerver/signals.py

@@ -1,10 +1,8 @@
-
-from typing import Any, Dict, Optional
+from typing import Any, Optional
 
 from django.conf import settings
 from django.contrib.auth.signals import user_logged_in
 from django.dispatch import receiver
-from django.template import loader
 from django.utils.timezone import \
     get_current_timezone_name as timezone_get_current_timezone_name
 from django.utils.timezone import now as timezone_now

zerver/templatetags/app_filters.py

@@ -1,4 +1,3 @@
-import os
 from html import unescape
 from typing import Any, Dict, List, Optional
 
@@ -7,8 +6,7 @@ import markdown.extensions.admonition
 import markdown.extensions.codehilite
 import markdown.extensions.extra
 import markdown.extensions.toc
-from django.conf import settings
-from django.template import Library, engines, loader
+from django.template import Library, engines
 from django.utils.safestring import mark_safe
 from jinja2.exceptions import TemplateNotFound
 
@@ -21,7 +19,6 @@ import zerver.lib.bugdown.help_settings_links
 import zerver.lib.bugdown.help_relative_links
 import zerver.lib.bugdown.help_emoticon_translations_table
 import zerver.lib.bugdown.include
-from zerver.context_processors import zulip_default_context
 from zerver.lib.cache import ignore_unhashable_lru_cache
 
 register = Library()

zerver/worker/queue_processors.py

@@ -14,8 +14,8 @@ from django.db import connection
 from django.core.handlers.wsgi import WSGIRequest
 from django.core.handlers.base import BaseHandler
 from zerver.models import \
-    get_client, get_system_bot, ScheduledEmail, PreregistrationUser, \
-    get_user_profile_by_id, Message, Realm, Service, UserMessage, UserProfile, \
+    get_client, get_system_bot, PreregistrationUser, \
+    get_user_profile_by_id, Message, Realm, UserMessage, UserProfile, \
     Client
 from zerver.lib.context_managers import lockfile
 from zerver.lib.error_notify import do_report_error
@@ -27,7 +27,7 @@ from zerver.lib.push_notifications import handle_push_notification, handle_remov
     initialize_push_notifications
 from zerver.lib.actions import do_send_confirmation_email, \
     do_update_user_activity, do_update_user_activity_interval, do_update_user_presence, \
-    internal_send_message, check_send_message, extract_recipients, \
+    internal_send_message, \
     render_incoming_message, do_update_embedded_data, do_mark_stream_messages_as_read
 from zerver.lib.url_preview import preview as url_preview
 from zerver.lib.digest import handle_digest_email
@@ -35,7 +35,6 @@ from zerver.lib.send_email import send_future_email, send_email_from_dict, \
     FromAddress, EmailNotDeliveredException, handle_send_email_format_changes
 from zerver.lib.email_mirror import process_message as mirror_email
 from zerver.lib.streams import access_stream_by_id
-from zerver.decorator import JsonableError
 from zerver.tornado.socket import req_redis_key, respond_send_message
 from confirmation.models import Confirmation, create_confirmation_link
 from zerver.lib.db import reset_queries
@@ -56,8 +55,6 @@ import datetime
 import logging
 import requests
 from io import StringIO
-import re
-import importlib
 
 logger = logging.getLogger(__name__)