Clean up LGTM alerts (sonic-net#1239)

Clean up some alerts which were detected by LGTM tool

pcieutil/main.py

@@ -11,7 +11,6 @@
 
     import click
     from sonic_py_common import device_info, logger
-    from tabulate import tabulate
 except ImportError as e:
     raise ImportError("%s - required module not found" % str(e))
 

scripts/db_migrator.py

@@ -2,7 +2,6 @@
 
 import argparse
 import json
-import os
 import sys
 import traceback
 

scripts/natconfig

@@ -287,15 +287,15 @@ class NatConfig(object):
            else:
                print("Admin Mode     : disabled")
            if 'nat_timeout' in global_data:
-               print("Global Timeout : {}".format(global_data['nat_timeout'], "secs"))
+               print("Global Timeout : {} secs".format(global_data['nat_timeout']))
            else:
                print("Global Timeout : 600 secs")
            if 'nat_tcp_timeout' in global_data:
-               print("TCP Timeout    : {}".format(global_data['nat_tcp_timeout'], "secs"))
+               print("TCP Timeout    : {} secs".format(global_data['nat_tcp_timeout']))
            else:
                print("TCP Timeout    : 86400 secs")
            if 'nat_udp_timeout' in global_data:
-               print("UDP Timeout    : {}".format(global_data['nat_udp_timeout'], "secs"))
+               print("UDP Timeout    : {} secs".format(global_data['nat_udp_timeout']))
            else:
                print("UDP Timeout    : 300 secs")
            print("")

scripts/natshow

@@ -132,8 +132,6 @@ class NatShow(object):
                 continue
 
             ip_protocol = "all"
-            source = "---"
-            destination = "---"
             translated_dst = "---"
             translated_src = "---"
 
@@ -282,8 +280,6 @@ class NatShow(object):
                     nat_twice_values = self.appl_db.get_all(self.appl_db.APPL_DB,'NAT_TWICE_TABLE:{}'.format(nat_twice_entry))
 
                     ip_protocol = "all"
-                    source = "---"
-                    destination = "---"
 
                     source = nat_twice_keys[0]
                     destination = nat_twice_keys[1]
@@ -308,8 +304,6 @@ class NatShow(object):
                     napt_twice_values = self.appl_db.get_all(self.appl_db.APPL_DB,'NAPT_TWICE_TABLE:{}'.format(napt_twice_entry))
 
                     ip_protocol = napt_twice_keys[0].lower()
-                    source = "---"
-                    destination = "---"
 
                     source = napt_twice_keys[1] + ':' + napt_twice_keys[2]
                     destination = napt_twice_keys[3] + ':' + napt_twice_keys[4]

show/bgp_frr_v4.py

@@ -1,11 +1,9 @@
-import json
-
 import click
-
 import utilities_common.bgp_util as bgp_util
 import utilities_common.cli as clicommon
 import utilities_common.constants as constants
 import utilities_common.multi_asic as multi_asic_util
+
 from show.main import ip, run_command
 
 ###############################################################################

show/interfaces/portchannel.py

@@ -1,7 +1,3 @@
-
-import os
-import sys
-
 import click
 import utilities_common.cli as clicommon
 from natsort import natsorted
@@ -167,4 +163,4 @@ def portchannel(namespace, display, verbose):
     """Show PortChannel information"""
     team = Teamshow(namespace, display)
     team.get_teams_info()
-    team.display_summary()
+    team.display_summary()

utilities_common/bgp_util.py

@@ -1,6 +1,5 @@
 import ipaddress
 import json
-import os
 import re
 
 import click