clean up unused Python imports (#454)

* Remove unused python imports

These changes have been auto-generated with:

	pip3 install isort autoflake
	isort -rc -sl .
	autoflake --remove-all-unused-imports -i -r .
	isort -rc -m 3 .

Signed-off-by: Radostin Stoyanov <rstoyanov@fedoraproject.org>

* python: remove redundant parenthesis

Signed-off-by: Radostin Stoyanov <rstoyanov@fedoraproject.org>

utils/p4runtime_lib/bmv2.py

@@ -12,9 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-from .switch import SwitchConnection
 from p4.tmp import p4config_pb2
 
+from .switch import SwitchConnection
+
 
 def buildDeviceConfig(bmv2_json_file_path=None):
     "Builds the device config for BMv2"

utils/p4runtime_lib/convert.py

@@ -12,11 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+import math
 import re
 import socket
 
-import math
-
 '''
 This package contains several helper functions for encoding to and decoding from byte strings:
 - integers

utils/p4runtime_lib/error_utils.py

@@ -15,10 +15,10 @@
 
 import sys
 
-from google.rpc import status_pb2, code_pb2
 import grpc
+from google.rpc import code_pb2, status_pb2
 from p4.v1 import p4runtime_pb2
-from p4.v1 import p4runtime_pb2_grpc
+
 
 # Used to indicate that the gRPC error Status object returned by the server has
 # an incorrect format.

utils/p4runtime_lib/helper.py

@@ -15,11 +15,12 @@
 import re
 
 import google.protobuf.text_format
-from p4.v1 import p4runtime_pb2
 from p4.config.v1 import p4info_pb2
+from p4.v1 import p4runtime_pb2
 
 from .convert import encode
 
+
 class P4InfoHelper(object):
     def __init__(self, p4_info_filepath):
         p4info = p4info_pb2.P4Info()

utils/p4runtime_lib/simple_controller.py

@@ -19,11 +19,10 @@ import json
 import os
 import sys
 
-from . import bmv2
-from . import helper
-
 from p4.config.v1 import p4info_pb2
 
+from . import bmv2, helper
+
 
 def error(msg):
     print(' - ERROR! ' + msg, file=sys.stderr)

utils/p4runtime_lib/switch.py

@@ -12,14 +12,13 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-from queue import Queue
 from abc import abstractmethod
 from datetime import datetime
+from queue import Queue
 
 import grpc
-from p4.v1 import p4runtime_pb2
-from p4.v1 import p4runtime_pb2_grpc
 from p4.tmp import p4config_pb2
+from p4.v1 import p4runtime_pb2, p4runtime_pb2_grpc
 
 MSG_LOG_MAX_LEN = 1024