Remove unused imports from driver code

Author: mykaul

cassandra/cluster.py

@@ -45,8 +45,7 @@
 import weakref
 from weakref import WeakValueDictionary
 
-from cassandra import (ConsistencyLevel, AuthenticationFailed, InvalidRequest,
-                       OperationTimedOut, UnsupportedOperation,
+from cassandra import (ConsistencyLevel, AuthenticationFailed, OperationTimedOut, UnsupportedOperation,
                        SchemaTargetType, DriverException, ProtocolVersion,
                        UnresolvableContactPoints, DependencyException)
 from cassandra.auth import _proxy_execute_key, PlainTextAuthProvider
@@ -85,7 +84,7 @@
                              named_tuple_factory, dict_factory, tuple_factory, FETCH_SIZE_UNSET,
                              HostTargetingStatement)
 from cassandra.marshal import int64_pack
-from cassandra.tablets import Tablet, Tablets
+from cassandra.tablets import Tablet
 from cassandra.timestamps import MonotonicTimestampGenerator
 from cassandra.util import _resolve_contact_points_to_string_map, Version, maybe_add_timeout_to_query
 

cassandra/concurrent.py

@@ -17,7 +17,6 @@
 from heapq import heappush, heappop
 from itertools import cycle
 from threading import Condition
-import sys
 
 from cassandra.cluster import ResultSet, EXEC_PROFILE_DEFAULT
 

cassandra/connection.py

@@ -51,7 +51,7 @@
                                 RegisterMessage, ReviseRequestMessage)
 from cassandra.segment import SegmentCodec, CrcException
 from cassandra.util import OrderedDict
-from cassandra.shard_info import ShardingInfo
+from cassandra.shard_info import ShardingInfo  # noqa: F401  # re-exported for cassandra.connection.ShardingInfo
 
 log = logging.getLogger(__name__)
 

cassandra/cqlengine/connection.py

@@ -16,7 +16,7 @@
 import logging
 import threading
 
-from cassandra.cluster import Cluster, _ConfigMode, _NOT_SET, NoHostAvailable, UserTypeDoesNotExist, ConsistencyLevel
+from cassandra.cluster import Cluster, _ConfigMode, _NOT_SET, NoHostAvailable, UserTypeDoesNotExist
 from cassandra.query import SimpleStatement, dict_factory
 
 from cassandra.cqlengine import CQLEngineException

cassandra/cqlengine/query.py

@@ -18,7 +18,7 @@
 import time
 from warnings import warn
 
-from cassandra.query import SimpleStatement, BatchType as CBatchType, BatchStatement
+from cassandra.query import SimpleStatement, BatchType as CBatchType
 from cassandra.cqlengine import columns, CQLEngineException, ValidationError, UnicodeMixin
 from cassandra.cqlengine import connection as conn
 from cassandra.cqlengine.functions import Token, BaseQueryFunction, QueryValue

cassandra/cqltypes.py

@@ -44,7 +44,7 @@
 from uuid import UUID
 
 from cassandra.marshal import (int8_pack, int8_unpack, int16_pack, int16_unpack,
-                               uint16_pack, uint16_unpack, uint32_pack, uint32_unpack,
+                               uint16_unpack, uint32_pack, uint32_unpack,
                                int32_pack, int32_unpack, int64_pack, int64_unpack,
                                float_pack, float_unpack, double_pack, double_unpack,
                                varint_pack, varint_unpack, point_be, point_le,

cassandra/datastax/cloud/__init__.py

@@ -15,7 +15,6 @@
 import os
 import logging
 import json
-import sys
 import tempfile
 import shutil
 from urllib.request import urlopen

cassandra/encoder.py

@@ -25,7 +25,6 @@
 import calendar
 import datetime
 import math
-import sys
 import types
 from uuid import UUID
 import ipaddress

cassandra/io/asyncioreactor.py

@@ -7,7 +7,7 @@
 import os
 import socket
 import ssl
-from threading import Lock, Thread, get_ident
+from threading import Lock, Thread
 
 
 log = logging.getLogger(__name__)

cassandra/io/asyncorereactor.py

@@ -20,7 +20,6 @@
 import sys
 from threading import Lock, Thread, Event
 import time
-import weakref
 import sys
 import ssl