fix(Pylint): Small fixes

+ Just few obvious one

Signed-off-by: pmikus <pmikus@cisco.com>
Change-Id: I9bbac293a56d6b2943bef03cb3b8943e967dae6b

7 files changed, 25 insertions, 41 deletions

diff --git a/resources/libraries/python/DUTSetup.py b/resources/libraries/python/DUTSetup.py
index 504022381e..9d0a3a8ff7 100644
--- a/resources/libraries/python/DUTSetup.py
+++ b/resources/libraries/python/DUTSetup.py
@@ -408,11 +408,11 @@ class DUTSetup:
                 # sriov is not supported and we want 0 VFs
                 # no need to do anything
                 return
-            else:
-                raise RuntimeError(
-                    f"Can't configure {numvfs} VFs on {pf_pci_addr} device "
-                    f"on {node[u'host']} since it doesn't support SR-IOV."
-                )
+
+            raise RuntimeError(
+                f"Can't configure {numvfs} VFs on {pf_pci_addr} device "
+                f"on {node[u'host']} since it doesn't support SR-IOV."
+            )
 
         pci = pf_pci_addr.replace(u":", r"\:")
         command = f"sh -c \"echo {numvfs} | " \
@@ -572,10 +572,9 @@ class DUTSetup:
             # the directory doesn't exist which means the device is not bound
             # to any driver
             return None
-        else:
-            cmd = f"basename $(readlink -f {driver_path})"
-            ret_val, _ = exec_cmd_no_error(node, cmd)
-            return ret_val.strip()
+        cmd = f"basename $(readlink -f {driver_path})"
+        ret_val, _ = exec_cmd_no_error(node, cmd)
+        return ret_val.strip()
 
     @staticmethod
     def verify_kernel_module(node, module, force_load=False):
diff --git a/resources/libraries/python/DropRateSearch.py b/resources/libraries/python/DropRateSearch.py
index b1991ee046..2417df8c41 100644
--- a/resources/libraries/python/DropRateSearch.py
+++ b/resources/libraries/python/DropRateSearch.py
@@ -426,10 +426,8 @@ class DropRateSearch(metaclass=ABCMeta):
                     self._search_result = SearchResults.SUCCESS
                     self._search_result_rate = rate
                     return
-                else:
-                    raise RuntimeError(u"Unknown search result")
-            else:
-                raise Exception(u"Unknown search direction")
+                raise RuntimeError(u"Unknown search result")
+            raise Exception(u"Unknown search direction")
 
     def verify_search_result(self):
         """Fail if search was not successful.
diff --git a/resources/libraries/python/FlowUtil.py b/resources/libraries/python/FlowUtil.py
index 1f647a8e11..1dcb7e0fae 100644
--- a/resources/libraries/python/FlowUtil.py
+++ b/resources/libraries/python/FlowUtil.py
@@ -19,6 +19,8 @@ from resources.libraries.python.topology import Topology
 from resources.libraries.python.ssh import exec_cmd_no_error
 from resources.libraries.python.PapiExecutor import PapiSocketExecutor
 
+from vpp_papi import VppEnum
+
 class FlowUtil:
     """Utilities for flow configuration."""
 
@@ -48,8 +50,6 @@ class FlowUtil:
         :returns: flow_index.
         :rtype: int
         """
-        from vpp_papi import VppEnum
-
         flow = u"ip4_n_tuple"
         flow_type = VppEnum.vl_api_flow_type_t.FLOW_TYPE_IP4_N_TUPLE
 
@@ -99,8 +99,6 @@ class FlowUtil:
         :returns: flow_index.
         :rtype: int
         """
-        from vpp_papi import VppEnum
-
         flow = u"ip6_n_tuple"
         flow_type = VppEnum.vl_api_flow_type_t.FLOW_TYPE_IP6_N_TUPLE
 
@@ -147,8 +145,6 @@ class FlowUtil:
         :returns: flow_index.
         :rtype: int
         """
-        from vpp_papi import VppEnum
-
         flow = u"ip4"
         flow_type = VppEnum.vl_api_flow_type_t.FLOW_TYPE_IP4
 
@@ -191,8 +187,6 @@ class FlowUtil:
         :returns: flow_index.
         :rtype: int
         """
-        from vpp_papi import VppEnum
-
         flow = u"ip6"
         flow_type = VppEnum.vl_api_flow_type_t.FLOW_TYPE_IP6
 
@@ -237,8 +231,6 @@ class FlowUtil:
         :returns: flow_index.
         :rtype: int
         """
-        from vpp_papi import VppEnum
-
         flow = u"ip4_gtpu"
         flow_type = VppEnum.vl_api_flow_type_t.FLOW_TYPE_IP4_GTPU
         flow_proto = VppEnum.vl_api_ip_proto_t.IP_API_PROTO_UDP
@@ -273,8 +265,6 @@ class FlowUtil:
         :returns: flow_index.
         :rtype: int
         """
-        from vpp_papi import VppEnum
-
         if proto == u"ESP":
             flow = u"ip4_ipsec_esp"
             flow_proto = VppEnum.vl_api_ip_proto_t.IP_API_PROTO_ESP
@@ -312,8 +302,6 @@ class FlowUtil:
         :returns: flow_index.
         :rtype: int
         """
-        from vpp_papi import VppEnum
-
         flow = u"ip4_l2tpv3oip"
         flow_proto = 115    # IP_API_PROTO_L2TP
         flow_type = VppEnum.vl_api_flow_type_t.FLOW_TYPE_IP4_L2TPV3OIP
@@ -347,8 +335,6 @@ class FlowUtil:
         :type value: int
         :returns: flow_index.
         """
-        from vpp_papi import VppEnum
-
         flow = u"ip4_vxlan"
         flow_type = VppEnum.vl_api_flow_type_t.FLOW_TYPE_IP4_VXLAN
         flow_proto = VppEnum.vl_api_ip_proto_t.IP_API_PROTO_UDP
@@ -387,8 +373,6 @@ class FlowUtil:
         :rtype: int
         :raises ValueError: If action type is not supported.
         """
-        from vpp_papi import VppEnum
-
         cmd = u"flow_add"
 
         if action == u"redirect-to-queue":
diff --git a/resources/libraries/python/IPUtil.py b/resources/libraries/python/IPUtil.py
index 57a738bb46..4a5a413fc8 100644
--- a/resources/libraries/python/IPUtil.py
+++ b/resources/libraries/python/IPUtil.py
@@ -155,8 +155,8 @@ class NetworkIncrement(ObjIncrement):
             return f"{self._value.network_address}/{self._prefix_len}"
         elif self._format == u"addr":
             return f"{self._value.network_address}"
-        else:
-            raise RuntimeError(f"Unsupported format {self._format}")
+
+        raise RuntimeError(f"Unsupported format {self._format}")
 
 
 class IPUtil:
diff --git a/resources/libraries/python/IPsecUtil.py b/resources/libraries/python/IPsecUtil.py
index acae5bd91d..e455dd7a88 100644
--- a/resources/libraries/python/IPsecUtil.py
+++ b/resources/libraries/python/IPsecUtil.py
@@ -787,11 +787,11 @@ class IPsecUtil:
         :type action: IPsecUtil.PolicyAction
         :type inbound: bool
         :type bidirectional: bool
-        :raises NotImplemented: When the action is PolicyAction.PROTECT.
+        :raises NotImplementedError: When the action is PolicyAction.PROTECT.
         """
 
         if action == PolicyAction.PROTECT:
-            raise NotImplemented('Policy action PROTECT is not supported.')
+            raise NotImplementedError('Policy action PROTECT is not supported.')
 
         spd_id_dir1 = 1
         spd_id_dir2 = 2
@@ -1014,7 +1014,7 @@ class IPsecUtil:
             tmp_filename = f"/tmp/ipsec_spd_{spd_id}_add_del_entry.script"
 
             with open(tmp_filename, 'w') as tmp_file:
-                for i in range(n_entries):
+                for _ in range(n_entries):
                     direction = u'inbound' if inbound else u'outbound'
                     sa = f' sa {sa_id.inc_fmt()}' if sa_id is not None else ''
                     protocol = f' protocol {protocol}' if proto else ''
@@ -1041,7 +1041,7 @@ class IPsecUtil:
             os.remove(tmp_filename)
             return
 
-        for i in range(n_entries):
+        for _ in range(n_entries):
             IPsecUtil.vpp_ipsec_add_spd_entry(
                 node, spd_id, next(priority), action, inbound,
                 next(sa_id) if sa_id is not None else sa_id,
@@ -2208,7 +2208,8 @@ class IPsecUtil:
                 crypto_key, integ_alg, integ_key, tunnel_ip1, tunnel_ip2
             )
             IPsecUtil.vpp_ipsec_add_spd_entries(
-                nodes[u"DUT2"], n_tunnels, spd_id, priority=ObjIncrement(p_lo, 0),
+                nodes[u"DUT2"], n_tunnels, spd_id,
+                priority=ObjIncrement(p_lo, 0),
                 action=PolicyAction.PROTECT, inbound=True,
                 sa_id=ObjIncrement(sa_id_1, 1),
                 raddr_range=NetworkIncrement(ip_network(raddr_ip2))
@@ -2219,7 +2220,8 @@ class IPsecUtil:
                 crypto_key, integ_alg, integ_key, tunnel_ip2, tunnel_ip1
             )
             IPsecUtil.vpp_ipsec_add_spd_entries(
-                nodes[u"DUT2"], n_tunnels, spd_id, priority=ObjIncrement(p_lo, 0),
+                nodes[u"DUT2"], n_tunnels, spd_id,
+                priority=ObjIncrement(p_lo, 0),
                 action=PolicyAction.PROTECT, inbound=False,
                 sa_id=ObjIncrement(sa_id_2, 1),
                 raddr_range=NetworkIncrement(ip_network(raddr_ip1))
diff --git a/resources/libraries/python/IncrementUtil.py b/resources/libraries/python/IncrementUtil.py
index 544e5708f0..45260ae06f 100644
--- a/resources/libraries/python/IncrementUtil.py
+++ b/resources/libraries/python/IncrementUtil.py
@@ -14,7 +14,7 @@
 """Increment utilities library."""
 
 
-class ObjIncrement(object):
+class ObjIncrement():
     """
     An iterator class used to generate incremented values in each iteration
     or when inc_fmt is called.
diff --git a/resources/libraries/python/NodePath.py b/resources/libraries/python/NodePath.py
index d1f974aafe..b9b4fc94e6 100644
--- a/resources/libraries/python/NodePath.py
+++ b/resources/libraries/python/NodePath.py
@@ -217,7 +217,8 @@ class NodePath:
             raise RuntimeError(u"No path for topology")
         return self._path[-2]
 
-    def compute_circular_topology(self, nodes, filter_list=None, nic_pfs=1,
+    def compute_circular_topology(
+            self, nodes, filter_list=None, nic_pfs=1,
             always_same_link=False, topo_has_tg=True, topo_has_dut=True):
         """Return computed circular path.