Lots of code cleanups.

https://bugs.launchpad.net/zodb/+bug/677751

src/ZEO/ServerStub.py

@@ -13,7 +13,6 @@
 ##############################################################################
 """RPC stubs for interface exported by StorageServer."""
 
-import os
 import time
 from ZODB.utils import z64
 

src/ZEO/StorageServer.py

@@ -26,7 +26,6 @@ from ZEO.Exceptions import AuthError
 from ZEO.monitor import StorageStats, StatsServer
 from ZEO.zrpc.connection import ManagedServerConnection, Delay, MTDelay, Result
 from ZEO.zrpc.server import Dispatcher
-from ZEO.zrpc.trigger import trigger
 from ZODB.ConflictResolution import ResolvedSerial
 from ZODB.loglevels import BLATHER
 from ZODB.POSException import StorageError, StorageTransactionError

src/ZEO/hash.py

@@ -16,8 +16,6 @@
 in favor of using hashlib for both. This class allows for compatibility
 between versions."""
 
-import sys
-
 try:
     import hashlib
     sha1 = hashlib.sha1

src/ZEO/monitor.py

@@ -22,8 +22,6 @@ import time
 import types
 import logging
 
-import ZEO
-
 zeo_version = 'unknown'
 try:
     import pkg_resources

src/ZEO/runzeo.py

@@ -41,7 +41,7 @@ import signal
 import socket
 import logging
 
-import ZConfig, ZConfig.datatypes
+import ZConfig.datatypes
 import ZEO
 from zdaemon.zdoptions import ZDOptions
 

src/ZEO/scripts/cache_simul.py

@@ -33,11 +33,9 @@ Note:
 
 import bisect
 import getopt
-import math
 import struct
 import re
 import sys
-import time
 import ZEO.cache
 
 from ZODB.utils import z64, u64

src/ZEO/tests/ConnectionTests.py

@@ -13,9 +13,7 @@
 ##############################################################################
 
 import os
-import sys
 import time
-import random
 import socket
 import asyncore
 import threading

src/ZEO/tests/testZEOOptions.py

@@ -15,7 +15,6 @@
 """Test suite for ZEO.runzeo.ZEOOptions."""
 
 import os
-import sys
 import tempfile
 import unittest
 

src/ZEO/tests/test_cache.py

@@ -16,7 +16,6 @@
 from ZODB.utils import p64, repr_to_oid
 import doctest
 import os
-import random
 import string
 import struct
 import sys

src/ZEO/zrpc/client.py

@@ -19,9 +19,7 @@ import socket
 import sys
 import threading
 import time
-import traceback
 import types
-import logging
 import ZEO.zrpc.trigger
 
 

src/ZEO/zrpc/connection.py

@@ -12,17 +12,11 @@
 #
 ##############################################################################
 import asyncore
-import atexit
-import cPickle
-import errno
-import select
 import sys
 import threading
 import logging
 import ZEO.zrpc.marshal
 
-import traceback, time
-
 import ZEO.zrpc.trigger
 
 from ZEO.zrpc import smac

src/ZODB/Connection.py

@@ -21,7 +21,6 @@ import tempfile
 import threading
 import warnings
 import os
-import shutil
 import time
 
 from persistent import PickleCache
@@ -48,7 +47,7 @@ from ZODB.POSException import InvalidObjectReference, ConnectionStateError
 from ZODB.POSException import ConflictError, ReadConflictError
 from ZODB.POSException import Unsupported, ReadOnlyHistoryError
 from ZODB.POSException import POSKeyError
-from ZODB.serialize import ObjectWriter, ObjectReader, myhasattr
+from ZODB.serialize import ObjectWriter, ObjectReader
 from ZODB.utils import p64, u64, z64, oid_repr, positive_id
 from ZODB import utils
 

src/ZODB/DB.py

@@ -20,7 +20,6 @@ import sys
 import threading
 import logging
 import datetime
-import calendar
 import time
 import warnings
 

src/ZODB/ExportImport.py

@@ -22,7 +22,7 @@ import logging
 
 from ZODB.blob import Blob
 from ZODB.interfaces import IBlobStorage
-from ZODB.POSException import ExportError, POSKeyError
+from ZODB.POSException import ExportError
 from ZODB.serialize import referencesf
 from ZODB.utils import p64, u64, cp, mktemp
 

src/ZODB/FileStorage/FileStorage.py

@@ -31,7 +31,6 @@ from ZODB.POSException import UndoError, POSKeyError, MultipleUndoErrors
 from ZODB.utils import p64, u64, z64
 
 import base64
-import BTrees.OOBTree
 import contextlib
 import errno
 import logging

src/ZODB/FileStorage/fsdump.py

@@ -18,7 +18,6 @@ from ZODB.FileStorage.format import TRANS_HDR, TRANS_HDR_LEN
 from ZODB.FileStorage.format import DATA_HDR, DATA_HDR_LEN
 from ZODB.TimeStamp import TimeStamp
 from ZODB.utils import u64, get_pickle_metadata
-from ZODB.tests.StorageTestBase import zodb_unpickle
 
 def fsdump(path, file=None, with_offset=1):
     iter = FileIterator(path)

src/ZODB/FileStorage/tests.py

@@ -11,7 +11,6 @@
 # FOR A PARTICULAR PURPOSE.
 #
 ##############################################################################
-import cPickle
 import doctest
 import os
 import time

src/ZODB/MappingStorage.py

@@ -18,7 +18,6 @@ storage without distracting storage details.
 """
 
 import BTrees
-import cPickle
 import time
 import threading
 import ZODB.BaseStorage

src/ZODB/scripts/analyze.py

@@ -3,7 +3,6 @@
 # Based on a transaction analyzer by Matt Kromer.
 
 import pickle
-import re
 import sys
 import types
 from ZODB.FileStorage import FileStorage

src/ZODB/scripts/manual_tests/testfstest.py

@@ -4,10 +4,8 @@ Note:  To run this test script fstest.py must be on your PYTHONPATH.
 """
 
 from cStringIO import StringIO
-import os
 import re
 import struct
-import tempfile
 import unittest
 import ZODB.tests.util
 

src/ZODB/scripts/migrateblobs.py

@@ -19,8 +19,8 @@ import optparse
 import os
 import shutil
 
-from ZODB.blob import FilesystemHelper, rename_or_copy_blob
-from ZODB.utils import cp, oid_repr
+from ZODB.blob import FilesystemHelper
+from ZODB.utils import oid_repr
 
 
 def link_or_copy(f1, f2):

src/ZODB/scripts/referrers.py

@@ -25,6 +25,3 @@ def referrers(storage):
             for oid in referencesf(record.data):
                 result.setdefault(oid, []).append((record.oid, record.tid))
     return result
-
-                
-            

src/ZODB/tests/Corruption.py

@@ -17,7 +17,7 @@ import os
 import random
 import stat
 
-import ZODB, ZODB.FileStorage
+import ZODB.FileStorage
 from StorageTestBase import StorageTestBase
 
 class FileStorageCorruptTests(StorageTestBase):

src/ZODB/tests/HistoryStorage.py

@@ -18,7 +18,6 @@ all these tests.
 """
 
 from ZODB.tests.MinPO import MinPO
-from transaction import Transaction
 
 class HistoryStorage:
     def checkSimpleHistory(self):

src/ZODB/tests/MVCCMappingStorage.py

@@ -17,14 +17,10 @@ Each Connection has its own view of the database.  Polling updates each
 connection's view.
 """
 
-import time
-
-import BTrees
 import ZODB.utils
 import ZODB.POSException
 from ZODB.interfaces import IMVCCStorage
 from ZODB.MappingStorage import MappingStorage
-from ZODB.TimeStamp import TimeStamp
 from zope.interface import implements
 
 

src/ZODB/tests/RecoveryStorage.py

@@ -16,7 +16,7 @@
 import transaction
 from transaction import Transaction
 from ZODB.tests.IteratorStorage import IteratorDeepCompare
-from ZODB.tests.StorageTestBase import MinPO, zodb_unpickle, snooze
+from ZODB.tests.StorageTestBase import MinPO, snooze
 from ZODB import DB
 from ZODB.serialize import referencesf
 

src/ZODB/tests/testCache.py

@@ -27,7 +27,6 @@ import doctest
 import gc
 import sys
 import threading
-import time
 import transaction
 import unittest
 import ZODB

src/ZODB/tests/testConnection.py

@@ -17,13 +17,11 @@ from __future__ import with_statement
 
 import doctest
 import unittest
-import warnings
 
 from persistent import Persistent
 import transaction
 from ZODB.config import databaseFromString
-from ZODB.utils import p64, u64
-from ZODB.tests.warnhook import WarningsHook
+from ZODB.utils import p64
 from zope.interface.verify import verifyObject
 import ZODB.tests.util
 

src/ZODB/tests/testDB.py

@@ -13,7 +13,6 @@
 ##############################################################################
 
 from ZODB.tests.MinPO import MinPO
-import datetime
 import doctest
 import os
 import sys

src/ZODB/tests/testZODB.py

@@ -14,13 +14,11 @@
 
 from persistent import Persistent
 from persistent.mapping import PersistentMapping
-from ZODB.POSException import ReadConflictError, ConflictError
+from ZODB.POSException import ReadConflictError
 from ZODB.POSException import TransactionFailedError
-from ZODB.tests.warnhook import WarningsHook
 
 import transaction
 import unittest
-import warnings
 import ZODB
 import ZODB.FileStorage
 import ZODB.MappingStorage

src/ZODB/tests/test_storage.py

@@ -21,7 +21,6 @@ storage tests against the test storage.
 from __future__ import with_statement
 
 import bisect
-import threading
 import unittest
 
 from ZODB.BaseStorage import BaseStorage
@@ -30,7 +29,7 @@ from ZODB.utils import z64
 
 from ZODB.tests import StorageTestBase
 from ZODB.tests import BasicStorage, MTStorage, Synchronization
-from ZODB.tests import PackableStorage, RevisionStorage
+from ZODB.tests import RevisionStorage
 
 class Transaction(object):
     """Hold data for current transaction for MinimalMemoryStorage."""

src/ZODB/tests/testconflictresolution.py

@@ -15,7 +15,6 @@ import manuel.doctest
 import manuel.footnote
 import manuel.capture
 import manuel.testing
-import unittest
 import ZODB.ConflictResolution
 import ZODB.tests.util
 import zope.testing.module

src/ZODB/tests/testpersistentclass.py

@@ -12,7 +12,6 @@
 #
 ##############################################################################
 import doctest
-import os
 import sys
 import transaction
 import unittest

src/ZODB/tests/util.py

@@ -20,16 +20,15 @@ from ZODB.MappingStorage import DB
 
 import atexit
 import os
-import tempfile
-import time
-import unittest
 import persistent
 import sys
+import tempfile
 import time
 import transaction
+import unittest
 import warnings
-import zope.testing.setupstack
 import ZODB.utils
+import zope.testing.setupstack
 
 def setUp(test, name='test'):
     transaction.abort()

src/ZODB/utils.py

@@ -19,7 +19,6 @@ from struct import pack, unpack
 from binascii import hexlify, unhexlify
 import cPickle as pickle
 from cStringIO import StringIO
-import weakref
 import warnings
 from tempfile import mkstemp
 import os