[PATCH v2] framework/pktgen_*: fix pylama errors

["Juraj Linkeš" <juraj.linkes@pantheon.tech>]

Pylama found the following errors:
framework/pktgen_base.py:108: [E] E1101 Instance of 'PacketGenerator' has no '_get_gen_port' member [pylint]
framework/pktgen_base.py:148: [E] E1101 Instance of 'PacketGenerator' has no '_clear_streams' member; maybe 'clear_streams'? [pylint]
framework/pktgen_base.py:173: [E] E1101 Instance of 'PacketGenerator' has no 'pktgen_type' member [pylint]
framework/pktgen_base.py:279: [E] E1101 Instance of 'PacketGenerator' has no 'pktgen_type' member [pylint]
framework/pktgen_base.py:479: [E] E1101 Instance of 'PacketGenerator' has no '_clear_streams' member; maybe 'clear_streams'? [pylint]
framework/pktgen_base.py:528: [E] E0602 Undefined variable 'last_no_lost_mult' [pylint]
framework/pktgen_base.py:558: [E] E1101 Instance of 'PacketGenerator' has no 'pktgen_type' member [pylint]
framework/pktgen_base.py:573: [E] E1101 Instance of 'PacketGenerator' has no '_clear_streams' member; maybe 'clear_streams'? [pylint]
framework/pktgen_base.py:607: [E] E1101 Instance of 'PacketGenerator' has no '_clear_streams' member; maybe 'clear_streams'? [pylint]
framework/pktgen_base.py:673: [E] E1101 Instance of 'PacketGenerator' has no 'pktgen_type' member [pylint]
framework/pktgen_base.py:677: [E] E1101 Instance of 'PacketGenerator' has no 'pktgen_type' member [pylint]
framework/pktgen_base.py:69: [E] E1101 Instance of 'PacketGenerator' has no '_prepare_generator' member; maybe 'prepare_generator'? [pylint]
framework/pktgen_base.py:77: [E] E1101 Instance of 'PacketGenerator' has no '_get_port_pci' member [pylint]
framework/pktgen_ixia.py:1085: [E] E1306 Not enough arguments for format string [pylint]
framework/pktgen_trex.py:194: [E] E0602 Undefined variable 'Ether' [pylint]
framework/pktgen_trex.py:195: [E] E0602 Undefined variable 'IP' [pylint]

Signed-off-by: Juraj Linkeš <juraj.linkes@pantheon.tech>
---
Lijuan, please add additional people to review if needed.
---
 framework/pktgen_base.py | 15 ++++++++++++++-
 framework/pktgen_ixia.py |  2 +-
 framework/pktgen_trex.py |  5 ++++-
 3 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/framework/pktgen_base.py b/framework/pktgen_base.py
index 023652cc..16eae93f 100644
--- a/framework/pktgen_base.py
+++ b/framework/pktgen_base.py
@@ -64,10 +64,17 @@ class PacketGenerator(object):
         self.tester = tester
         self.__streams = []
         self._ports_map = []
+        self.pktgen_type = None
+
+    def _prepare_generator(self):
+        raise NotImplementedError
 
     def prepare_generator(self):
         self._prepare_generator()
 
+    def _get_port_pci(self, port_id):
+        raise NotImplementedError
+
     def _convert_pktgen_port(self, port_id):
         '''
         :param port_id:
@@ -94,6 +101,9 @@ class PacketGenerator(object):
 
         return port
 
+    def _get_gen_port(self, tester_pci):
+        raise NotImplementedError
+
     def _convert_tester_port(self, port_id):
         '''
         :param port_id:
@@ -143,6 +153,9 @@ class PacketGenerator(object):
     def get_streams(self):
         return self.__streams
 
+    def _clear_streams(self):
+        raise NotImplementedError
+
     def clear_streams(self):
         ''' clear streams '''
         self._clear_streams()
@@ -525,7 +538,7 @@ class PacketGenerator(object):
                 break
             pps = (traffic_pps_max - traffic_pps_min)/2 + traffic_pps_min
 
-        self.logger.info("zero loss pps is %f" % last_no_lost_mult)
+        self.logger.info("zero loss pps is %f" % pps)
         # use last result as return data to keep the same with dts/etgen format
         # In fact, multiple link peer have multiple loss rate value,
         # here only pick one
diff --git a/framework/pktgen_ixia.py b/framework/pktgen_ixia.py
index 06667047..9a8c9d2e 100644
--- a/framework/pktgen_ixia.py
+++ b/framework/pktgen_ixia.py
@@ -1082,7 +1082,7 @@ class Ixia(SSHConnection):
         Tells IXIA to prepare the internal buffers were the frames were captured.
         """
         ixia_port = self.get_ixia_port(port_number)
-        command = 'capture get {0} {1} {2}'.format(ixia_port)
+        command = 'capture get {0}'.format(ixia_port)
         self.send_expect(command, '% ', 30)
 
     def stat_get_rate_stat_all_stats(self, port_number):
diff --git a/framework/pktgen_trex.py b/framework/pktgen_trex.py
index 2ad05fe6..2f537a0b 100644
--- a/framework/pktgen_trex.py
+++ b/framework/pktgen_trex.py
@@ -35,6 +35,9 @@ import sys
 import time
 from pprint import pformat
 
+from scapy.layers.inet import IP
+from scapy.layers.l2 import Ether
+
 from .pktgen_base import (
     PKTGEN,
     PKTGEN_TREX,
@@ -414,6 +417,7 @@ class TrexPacketGenerator(PacketGenerator):
     https://trex-tgn.cisco.com/trex/doc/trex_manual.html
     """
     def __init__(self, tester):
+        super(TrexPacketGenerator, self).__init__(tester)
         self.pktgen_type = PKTGEN_TREX
         self.trex_app = "t-rex-64"
         self._conn = None
@@ -432,7 +436,6 @@ class TrexPacketGenerator(PacketGenerator):
         self.ip_keys = ['start', 'end','action', 'mask', 'step']
         self.vlan_keys = ['start', 'end', 'action', 'step', 'count']
 
-        super(TrexPacketGenerator, self).__init__(tester)
 
         # check trex binary file
         trex_bin = os.sep.join([self.conf.get('trex_root_path'), self.trex_app])
-- 
2.20.1