Clean up imports ordering.

Follow recommendations from flake8 regarding import order and
grouping.  Put two blank lines after the top import block in each
file.

Import CanError directly from can package in canopen.sdo.client
instead of from canopen.network, where it was not even used.

canopen/__init__.py

@@ -1,8 +1,14 @@
 from canopen.network import Network, NodeScanner
-from canopen.node import RemoteNode, LocalNode
-from canopen.sdo import SdoCommunicationError, SdoAbortedError
-from canopen.objectdictionary import import_od, export_od, ObjectDictionary, ObjectDictionaryError
+from canopen.node import LocalNode, RemoteNode
+from canopen.objectdictionary import (
+    ObjectDictionary,
+    ObjectDictionaryError,
+    export_od,
+    import_od,
+)
 from canopen.profiles.p402 import BaseNode402
+from canopen.sdo import SdoAbortedError, SdoCommunicationError
+
 try:
     from canopen._version import version as __version__
 except ImportError:

canopen/emcy.py

@@ -1,5 +1,5 @@
-import struct
 import logging
+import struct
 import threading
 import time
 from typing import Callable, List, Optional

canopen/lss.py

@@ -1,7 +1,7 @@
 import logging
-import time
-import struct
 import queue
+import struct
+import time
 
 import canopen.network
 

canopen/network.py

@@ -1,21 +1,21 @@
 from __future__ import annotations
 
-from collections.abc import MutableMapping
 import logging
 import threading
+from collections.abc import MutableMapping
 from typing import Callable, Dict, Final, Iterator, List, Optional, Union
 
 import can
 from can import Listener
-from can import CanError
 
-from canopen.node import RemoteNode, LocalNode
-from canopen.sync import SyncProducer
-from canopen.timestamp import TimeProducer
-from canopen.nmt import NmtMaster
 from canopen.lss import LssMaster
-from canopen.objectdictionary.eds import import_from_node
+from canopen.nmt import NmtMaster
+from canopen.node import LocalNode, RemoteNode
 from canopen.objectdictionary import ObjectDictionary
+from canopen.objectdictionary.eds import import_from_node
+from canopen.sync import SyncProducer
+from canopen.timestamp import TimeProducer
+
 
 logger = logging.getLogger(__name__)
 

canopen/nmt.py

@@ -1,6 +1,6 @@
-import threading
 import logging
 import struct
+import threading
 import time
 from typing import Callable, Optional, TYPE_CHECKING
 

canopen/node/__init__.py

@@ -1,2 +1,2 @@
-from canopen.node.remote import RemoteNode
 from canopen.node.local import LocalNode
+from canopen.node.remote import RemoteNode

canopen/node/local.py

@@ -4,13 +4,14 @@
 from typing import Dict, Union
 
 import canopen.network
-from canopen.node.base import BaseNode
-from canopen.sdo import SdoServer, SdoAbortedError
-from canopen.pdo import PDO, TPDO, RPDO
-from canopen.nmt import NmtSlave
+from canopen import objectdictionary
 from canopen.emcy import EmcyProducer
+from canopen.nmt import NmtSlave
+from canopen.node.base import BaseNode
 from canopen.objectdictionary import ObjectDictionary
-from canopen import objectdictionary
+from canopen.pdo import PDO, RPDO, TPDO
+from canopen.sdo import SdoAbortedError, SdoServer
+
 
 logger = logging.getLogger(__name__)
 

canopen/node/remote.py

@@ -1,15 +1,16 @@
 from __future__ import annotations
 
 import logging
-from typing import Union, TextIO
+from typing import TextIO, Union
 
 import canopen.network
-from canopen.sdo import SdoClient, SdoCommunicationError, SdoAbortedError
-from canopen.nmt import NmtMaster
 from canopen.emcy import EmcyConsumer
-from canopen.pdo import TPDO, RPDO, PDO
-from canopen.objectdictionary import ODRecord, ODArray, ODVariable, ObjectDictionary
+from canopen.nmt import NmtMaster
 from canopen.node.base import BaseNode
+from canopen.objectdictionary import ODArray, ODRecord, ODVariable, ObjectDictionary
+from canopen.pdo import PDO, RPDO, TPDO
+from canopen.sdo import SdoAbortedError, SdoClient, SdoCommunicationError
+
 
 logger = logging.getLogger(__name__)
 

canopen/objectdictionary/__init__.py

@@ -1,17 +1,19 @@
 """
 Object Dictionary module
 """
+
 from __future__ import annotations
 
+import logging
 import struct
+from collections.abc import Mapping, MutableMapping
 from typing import Dict, Iterator, List, Optional, TextIO, Union
-from collections.abc import MutableMapping, Mapping
-import logging
 
 from canopen.objectdictionary.datatypes import *
 from canopen.objectdictionary.datatypes import IntegerN, UnsignedN
 from canopen.utils import pretty_index
 
+
 logger = logging.getLogger(__name__)
 
 

canopen/objectdictionary/datatypes.py

@@ -1,5 +1,6 @@
 import struct
 
+
 BOOLEAN = 0x1
 INTEGER8 = 0x2
 INTEGER16 = 0x3

canopen/objectdictionary/eds.py

@@ -1,12 +1,13 @@
 import copy
 import logging
 import re
-from configparser import RawConfigParser, NoOptionError, NoSectionError
+from configparser import NoOptionError, NoSectionError, RawConfigParser
 
 from canopen import objectdictionary
 from canopen.objectdictionary import ObjectDictionary, datatypes
 from canopen.sdo import SdoClient
 
+
 logger = logging.getLogger(__name__)
 
 # Object type. Don't confuse with Data type

canopen/objectdictionary/epf.py

@@ -1,9 +1,10 @@
-import xml.etree.ElementTree as etree
 import logging
+import xml.etree.ElementTree as etree
 
 from canopen import objectdictionary
 from canopen.objectdictionary import ObjectDictionary
 
+
 logger = logging.getLogger(__name__)
 
 DATA_TYPES = {

canopen/pdo/base.py

@@ -1,21 +1,23 @@
 from __future__ import annotations
-import threading
+
+import binascii
+import logging
 import math
-from typing import Callable, Dict, Iterator, List, Optional, Union, TYPE_CHECKING
+import threading
 from collections.abc import Mapping
-import logging
-import binascii
+from typing import Callable, Dict, Iterator, List, Optional, TYPE_CHECKING, Union
 
 import canopen.network
-from canopen.sdo import SdoAbortedError
 from canopen import objectdictionary
 from canopen import variable
+from canopen.sdo import SdoAbortedError
 
 if TYPE_CHECKING:
     from canopen import LocalNode, RemoteNode
     from canopen.pdo import RPDO, TPDO
     from canopen.sdo import SdoRecord
 
+
 PDO_NOT_VALID = 1 << 31
 RTR_NOT_ALLOWED = 1 << 30
 

canopen/profiles/p402.py

@@ -7,6 +7,7 @@
 from canopen.pdo import PdoMap
 from canopen.sdo import SdoCommunicationError
 
+
 logger = logging.getLogger(__name__)
 
 

canopen/profiles/tools/test_p402_states.py

@@ -7,7 +7,7 @@
 """
 
 from canopen.objectdictionary import ObjectDictionary
-from canopen.profiles.p402 import State402, BaseNode402
+from canopen.profiles.p402 import BaseNode402, State402
 
 
 if __name__ == '__main__':

canopen/sdo/__init__.py

@@ -1,7 +1,7 @@
-from canopen.sdo.base import SdoVariable, SdoRecord, SdoArray
+from canopen.sdo.base import SdoArray, SdoRecord, SdoVariable
 from canopen.sdo.client import SdoClient
-from canopen.sdo.server import SdoServer
 from canopen.sdo.exceptions import SdoAbortedError, SdoCommunicationError
+from canopen.sdo.server import SdoServer
 
 # Compatibility
-from canopen.sdo.base import Variable, Record, Array
+from canopen.sdo.base import Array, Record, Variable

canopen/sdo/base.py

@@ -1,8 +1,8 @@
 from __future__ import annotations
 
 import binascii
-from typing import Iterator, Optional, Union
 from collections.abc import Mapping
+from typing import Iterator, Optional, Union
 
 import canopen.network
 from canopen import objectdictionary

canopen/sdo/client.py

@@ -1,15 +1,17 @@
-import struct
-import logging
 import io
-import time
+import logging
 import queue
+import struct
+import time
+
+from can import CanError
 
-from canopen.network import CanError
 from canopen import objectdictionary
 from canopen.sdo.base import SdoBase
-from canopen.utils import pretty_index
 from canopen.sdo.constants import *
 from canopen.sdo.exceptions import *
+from canopen.utils import pretty_index
+
 
 logger = logging.getLogger(__name__)
 

canopen/sdo/server.py

@@ -4,6 +4,7 @@
 from canopen.sdo.constants import *
 from canopen.sdo.exceptions import *
 
+
 logger = logging.getLogger(__name__)
 
 

canopen/timestamp.py

@@ -1,7 +1,8 @@
-import time
 import struct
+import time
 from typing import Optional
 
+
 # 1 Jan 1984
 OFFSET = 441763200
 

canopen/utils.py

@@ -1,4 +1,5 @@
 """Additional utility functions for canopen."""
+
 from typing import Optional, Union
 
 

canopen/variable.py

@@ -1,10 +1,11 @@
 import logging
-from typing import Union
 from collections.abc import Mapping
+from typing import Union
 
 from canopen import objectdictionary
 from canopen.utils import pretty_index
 
+
 logger = logging.getLogger(__name__)
 
 

examples/simple_ds402_node.py

@@ -1,9 +1,10 @@
-import canopen
-import sys
 import os
+import sys
+import time
 import traceback
 
-import time
+import canopen
+
 
 try:
 

test/test_eds.py

@@ -4,7 +4,8 @@
 import canopen
 from canopen.objectdictionary.eds import _signed_int_from_hex
 from canopen.utils import pretty_index
-from .util import SAMPLE_EDS, DATATYPES_EDS, tmp_file
+
+from .util import DATATYPES_EDS, SAMPLE_EDS, tmp_file
 
 
 class TestEDS(unittest.TestCase):

test/test_emcy.py

@@ -4,6 +4,7 @@
 from contextlib import contextmanager
 
 import can
+
 import canopen
 from canopen.emcy import EmcyError
 

test/test_local.py

@@ -2,6 +2,7 @@
 import unittest
 
 import canopen
+
 from .util import SAMPLE_EDS
 
 

test/test_network.py

@@ -1,10 +1,11 @@
 import logging
-import threading
 import time
 import unittest
 
-import canopen
 import can
+
+import canopen
+
 from .util import SAMPLE_EDS
 
 

test/test_nmt.py

@@ -3,8 +3,10 @@
 import unittest
 
 import can
+
 import canopen
-from canopen.nmt import COMMAND_TO_STATE, NMT_STATES, NMT_COMMANDS, NmtError
+from canopen.nmt import COMMAND_TO_STATE, NMT_COMMANDS, NMT_STATES, NmtError
+
 from .util import SAMPLE_EDS
 
 

test/test_od.py

@@ -1,4 +1,5 @@
 import unittest
+
 from canopen import objectdictionary as od
 
 

test/test_pdo.py

@@ -1,6 +1,7 @@
 import unittest
 
 import canopen
+
 from .util import SAMPLE_EDS, tmp_file
 
 

test/test_sdo.py

@@ -3,7 +3,8 @@
 import canopen
 import canopen.objectdictionary.datatypes as dt
 from canopen.objectdictionary import ODVariable
-from .util import SAMPLE_EDS, DATATYPES_EDS
+
+from .util import DATATYPES_EDS, SAMPLE_EDS
 
 
 TX = 1

test/test_sync.py

@@ -2,6 +2,7 @@
 import unittest
 
 import can
+
 import canopen