Pylint fixes

 - Fix PyLint errors
 - Fix comments in touched python modules

Change-Id: I26db2d292a41969cf38b9b0bdd49c4fb15349102
Signed-off-by: Tibor Frank <tifrank@cisco.com>

33 files changed, 194 insertions, 184 deletions

diff --git a/pylint.cfg b/pylint.cfg
index 6052e32da3..6a6e2865c6 100644
--- a/pylint.cfg
+++ b/pylint.cfg
@@ -88,7 +88,7 @@ single-line-if-stmt=no
 no-space-check=trailing-comma,dict-separator
 
 # Maximum number of lines in a module
-max-module-lines=1000
+max-module-lines=2000
 
 # String used as indentation unit. This is usually " " (4 spaces) or "\t" (1
 # tab).
@@ -145,7 +145,7 @@ class-rgx=[A-Z_][a-zA-Z0-9]+$
 function-rgx=[a-z_][a-z0-9_]{2,30}$
 
 # Regular expression which should only match correct method names
-method-rgx=[a-z_][a-z0-9_]{2,40}$
+method-rgx=[a-z_][a-z0-9_]{2,50}$
 
 # Regular expression which should only match correct instance attribute names
 attr-rgx=[a-z_][a-z0-9_]{2,30}$
@@ -242,7 +242,7 @@ int-import-graph=
 [DESIGN]
 
 # Maximum number of arguments for function / method
-max-args=10
+max-args=12
 
 # Argument names that match this expression will be ignored. Default to name
 # with leading underscore
@@ -270,7 +270,7 @@ max-attributes=10
 min-public-methods=0
 
 # Maximum number of public methods for a class (see R0904).
-max-public-methods=50
+max-public-methods=60
 
 
 [EXCEPTIONS]
diff --git a/resources/libraries/python/Classify.py b/resources/libraries/python/Classify.py
index c781bbbd14..ef140681d8 100644
--- a/resources/libraries/python/Classify.py
+++ b/resources/libraries/python/Classify.py
@@ -18,8 +18,6 @@ from robot.api import logger
 from resources.libraries.python.VatExecutor import VatExecutor, VatTerminal
 
 
-# pylint: disable=too-many-arguments, invalid-name
-
 class Classify(object):
     """Classify utilities."""
 
@@ -33,7 +31,7 @@ class Classify(object):
         :type node: dict
         :type ip_version: str
         :type direction: str
-        :return (table_index, skip_n, match_n)
+        :returns (table_index, skip_n, match_n)
         table_index: Classify table index.
         skip_n: Number of skip vectors.
         match_n: Number of match vectors.
@@ -65,7 +63,7 @@ class Classify(object):
         :param direction: Direction of traffic - src/dst.
         :type node: dict
         :type direction: str
-        :return (table_index, skip_n, match_n)
+        :returns (table_index, skip_n, match_n)
         table_index: Classify table index.
         skip_n: Number of skip vectors.
         match_n: Number of match vectors.
@@ -96,7 +94,7 @@ class Classify(object):
         :param hex_mask: Classify hex mask.
         :type node: dict
         :type hex_mask: str
-        :return (table_index, skip_n, match_n)
+        :returns (table_index, skip_n, match_n)
         table_index: Classify table index.
         skip_n: Number of skip vectors.
         match_n: Number of match vectors.
@@ -256,7 +254,7 @@ class Classify(object):
         :type ip_version: str
         :type protocol: str
         :type direction: str
-        :return: Classify hex mask.
+        :returns: Classify hex mask.
         :rtype : str
         :raises ValueError: If protocol is not TCP or UDP.
         :raises ValueError: If direction is not source or destination or
@@ -286,7 +284,7 @@ class Classify(object):
         :type hex_mask: str
         :type source_port: str
         :type destination_port: str
-        :return: Classify hex value.
+        :returns: Classify hex value.
         :rtype: str
         """
         source_port_hex = Classify._port_convert(source_port)
@@ -300,7 +298,7 @@ class Classify(object):
 
         :param port: TCP/UDP port number.
         :type port: str
-        :return: TCP/UDP port number in 4-digit hexadecimal format.
+        :returns: TCP/UDP port number in 4-digit hexadecimal format.
         :rtype: str
         """
         return '{0:04x}'.format(int(port))
@@ -331,7 +329,7 @@ class Classify(object):
         :param table_index: Index of a specific classify table.
         :type node: dict
         :type table_index: int
-        :return: Classify table settings.
+        :returns: Classify table settings.
         :rtype: dict
         """
         with VatTerminal(node) as vat:
@@ -352,7 +350,7 @@ class Classify(object):
         :type node: dict
         :type table_index: int
         :type session_index: int
-        :return: List of classify session settings, or a dictionary of settings
+        :returns: List of classify session settings, or a dictionary of settings
          for a specific classify session.
         :rtype: list or dict
         """
diff --git a/resources/libraries/python/DUTSetup.py b/resources/libraries/python/DUTSetup.py
index 6b2f5edb83..1f87f03cb9 100644
--- a/resources/libraries/python/DUTSetup.py
+++ b/resources/libraries/python/DUTSetup.py
@@ -88,8 +88,9 @@ class DUTSetup(object):
         ssh.connect(node)
 
         (ret_code, stdout, stderr) = \
-            ssh.exec_command('sudo -Sn bash {0}/{1}/dut_setup.sh'.format(
-                Constants.REMOTE_FW_DIR, Constants.RESOURCES_LIB_SH), timeout=120)
+            ssh.exec_command('sudo -Sn bash {0}/{1}/dut_setup.sh'.
+                             format(Constants.REMOTE_FW_DIR,
+                                    Constants.RESOURCES_LIB_SH), timeout=120)
         logger.trace(stdout)
         logger.trace(stderr)
         if int(ret_code) != 0:
@@ -118,7 +119,7 @@ class DUTSetup(object):
 
         if int(ret_code) != 0:
             logger.debug('Not possible to get PID of VPP process on node: '
-                         '"{1}"'.format(node['host'], stdout + stderr))
+                         '{0}\n {1}'.format(node['host'], stdout + stderr))
             raise RuntimeError('Not possible to get PID of VPP process on node:'
                                ' {}'.format(node['host']))
 
diff --git a/resources/libraries/python/DpdkUtil.py b/resources/libraries/python/DpdkUtil.py
index a81251c97b..4b00167cee 100644
--- a/resources/libraries/python/DpdkUtil.py
+++ b/resources/libraries/python/DpdkUtil.py
@@ -19,7 +19,6 @@ from resources.libraries.python.ssh import SSH, exec_cmd_no_error
 class DpdkUtil(object):
     """Utilities for DPDK."""
 
-    #pylint: disable=too-many-locals
     @staticmethod
     def dpdk_testpmd_start(node, **args):
         """Start DPDK testpmd app on VM node.
diff --git a/resources/libraries/python/IPUtil.py b/resources/libraries/python/IPUtil.py
index f3c037fdf0..4bd8869cb6 100644
--- a/resources/libraries/python/IPUtil.py
+++ b/resources/libraries/python/IPUtil.py
@@ -75,19 +75,19 @@ class IPUtil(object):
 
     @staticmethod
     def setup_network_namespace(node, namespace_name, interface_name,
-                                ip_address, prefix):
+                                ip_addr, prefix):
         """Setup namespace on given node and attach interface and IP to
         this namespace. Applicable also on TG node.
 
         :param node: Node to set namespace on.
         :param namespace_name: Namespace name.
         :param interface_name: Interface name.
-        :param ip_address: IP address of namespace's interface.
+        :param ip_addr: IP address of namespace's interface.
         :param prefix: IP address prefix length.
         :type node: dict
         :type namespace_name: str
         :type vhost_if: str
-        :type ip_address: str
+        :type ip_addr: str
         :type prefix: int
         """
         cmd = ('ip netns add {0}'.format(namespace_name))
@@ -98,7 +98,7 @@ class IPUtil(object):
         exec_cmd_no_error(node, cmd, sudo=True)
 
         cmd = ('ip netns exec {0} ip addr add {1}/{2} dev {3}'.format(
-            namespace_name, ip_address, prefix, interface_name))
+            namespace_name, ip_addr, prefix, interface_name))
         exec_cmd_no_error(node, cmd, sudo=True)
 
     @staticmethod
@@ -114,28 +114,29 @@ class IPUtil(object):
         exec_cmd_no_error(node, cmd, sudo=True)
 
     @staticmethod
-    def set_linux_interface_ip(node, interface, ip, prefix, namespace=None):
+    def set_linux_interface_ip(node, interface, ip_addr, prefix,
+                               namespace=None):
         """Set IP address to interface in linux.
 
         :param node: Node where to execute command.
         :param interface: Interface in namespace.
-        :param ip: IP to be set on interface.
+        :param ip_addr: IP to be set on interface.
         :param prefix: IP prefix.
         :param namespace: Execute command in namespace. Optional
         :type node: dict
         :type interface: str
-        :type ip: str
+        :type ip_addr: str
         :type prefix: int
         :type namespace: str
         :raises RuntimeError: IP could not be set.
         """
         if namespace is not None:
             cmd = 'ip netns exec {} ip addr add {}/{} dev {}'.format(
-                namespace, ip, prefix, interface)
+                namespace, ip_addr, prefix, interface)
         else:
-            cmd = 'ip addr add {}/{} dev {}'.format(ip, prefix, interface)
-        (rc, _, stderr) = exec_cmd(node, cmd, timeout=5, sudo=True)
-        if rc != 0:
+            cmd = 'ip addr add {}/{} dev {}'.format(ip_addr, prefix, interface)
+        (ret_code, _, stderr) = exec_cmd(node, cmd, timeout=5, sudo=True)
+        if ret_code != 0:
             raise RuntimeError(
                 'Could not set IP for interface, reason:{}'.format(stderr))
 
@@ -166,7 +167,7 @@ def convert_ipv4_netmask_prefix(network):
     Example: mask 255.255.0.0 -> prefix length 16
     :param network: Network mask or network prefix length.
     :type network: str or int
-    :return: Network mask or network prefix length.
+    :returns: Network mask or network prefix length.
     :rtype: str or int
     """
     temp_address = "0.0.0.0"
diff --git a/resources/libraries/python/IPsecUtil.py b/resources/libraries/python/IPsecUtil.py
index 70d44e0936..5a4a181fd0 100644
--- a/resources/libraries/python/IPsecUtil.py
+++ b/resources/libraries/python/IPsecUtil.py
@@ -22,7 +22,6 @@ from resources.libraries.python.topology import Topology
 from resources.libraries.python.VatJsonUtil import VatJsonUtil
 
 
-# pylint: disable=too-few-public-methods
 class PolicyAction(Enum):
     """Policy actions."""
     BYPASS = 'bypass'
@@ -61,14 +60,11 @@ class IntegAlg(Enum):
 class IPsecUtil(object):
     """IPsec utilities."""
 
-    # pylint: disable=too-many-arguments
-    # pylint: disable=too-many-locals
-
     @staticmethod
     def policy_action_bypass():
         """Return policy action bypass.
 
-        :return: PolicyAction enum BYPASS object.
+        :returns: PolicyAction enum BYPASS object.
         :rtype: PolicyAction
         """
         return PolicyAction.BYPASS
@@ -77,7 +73,7 @@ class IPsecUtil(object):
     def policy_action_discard():
         """Return policy action discard.
 
-        :return: PolicyAction enum DISCARD object.
+        :returns: PolicyAction enum DISCARD object.
         :rtype: PolicyAction
         """
         return PolicyAction.DISCARD
@@ -86,7 +82,7 @@ class IPsecUtil(object):
     def policy_action_protect():
         """Return policy action protect.
 
-        :return: PolicyAction enum PROTECT object.
+        :returns: PolicyAction enum PROTECT object.
         :rtype: PolicyAction
         """
         return PolicyAction.PROTECT
@@ -95,7 +91,7 @@ class IPsecUtil(object):
     def crypto_alg_aes_cbc_128():
         """Return encryption algorithm aes-cbc-128.
 
-        :return: CryptoAlg enum AES_CBC_128 object.
+        :returns: CryptoAlg enum AES_CBC_128 object.
         :rtype: CryptoAlg
         """
         return CryptoAlg.AES_CBC_128
@@ -104,7 +100,7 @@ class IPsecUtil(object):
     def crypto_alg_aes_cbc_192():
         """Return encryption algorithm aes-cbc-192.
 
-        :return: CryptoAlg enum AES_CBC_192 objec.
+        :returns: CryptoAlg enum AES_CBC_192 objec.
         :rtype: CryptoAlg
         """
         return CryptoAlg.AES_CBC_192
@@ -113,7 +109,7 @@ class IPsecUtil(object):
     def crypto_alg_aes_cbc_256():
         """Return encryption algorithm aes-cbc-256.
 
-        :return: CryptoAlg enum AES_CBC_256 object.
+        :returns: CryptoAlg enum AES_CBC_256 object.
         :rtype: CryptoAlg
         """
         return CryptoAlg.AES_CBC_256
@@ -124,7 +120,7 @@ class IPsecUtil(object):
 
         :param crypto_alg: Encryption algorithm.
         :type crypto_alg: CryptoAlg
-        :return: Key length.
+        :returns: Key length.
         :rtype: int
         """
         return crypto_alg.key_len
@@ -135,7 +131,7 @@ class IPsecUtil(object):
 
         :param crypto_alg: Encryption algorithm.
         :type crypto_alg: CryptoAlg
-        :return: Algorithm scapy name.
+        :returns: Algorithm scapy name.
         :rtype: str
         """
         return crypto_alg.scapy_name
@@ -144,7 +140,7 @@ class IPsecUtil(object):
     def integ_alg_sha1_96():
         """Return integrity algorithm SHA1-96.
 
-        :return: IntegAlg enum SHA1_96 object.
+        :returns: IntegAlg enum SHA1_96 object.
         :rtype: IntegAlg
         """
         return IntegAlg.SHA1_96
@@ -153,7 +149,7 @@ class IPsecUtil(object):
     def integ_alg_sha_256_128():
         """Return integrity algorithm SHA-256-128.
 
-        :return: IntegAlg enum SHA_256_128 object.
+        :returns: IntegAlg enum SHA_256_128 object.
         :rtype: IntegAlg
         """
         return IntegAlg.SHA_256_128
@@ -162,7 +158,7 @@ class IPsecUtil(object):
     def integ_alg_sha_384_192():
         """Return integrity algorithm SHA-384-192.
 
-        :return: IntegAlg enum SHA_384_192 object.
+        :returns: IntegAlg enum SHA_384_192 object.
         :rtype: IntegAlg
         """
         return IntegAlg.SHA_384_192
@@ -171,7 +167,7 @@ class IPsecUtil(object):
     def integ_alg_sha_512_256():
         """Return integrity algorithm SHA-512-256.
 
-        :return: IntegAlg enum SHA_512_256 object.
+        :returns: IntegAlg enum SHA_512_256 object.
         :rtype: IntegAlg
         """
         return IntegAlg.SHA_512_256
@@ -182,7 +178,7 @@ class IPsecUtil(object):
 
         :param integ_alg: Integrity algorithm.
         :type integ_alg: IntegAlg
-        :return: Key length.
+        :returns: Key length.
         :rtype: int
         """
         return integ_alg.key_len
@@ -193,7 +189,7 @@ class IPsecUtil(object):
 
         :param integ_alg: Integrity algorithm.
         :type integ_alg: IntegAlg
-        :return: Algorithm scapy name.
+        :returns: Algorithm scapy name.
         :rtype: str
         """
         return integ_alg.scapy_name
diff --git a/resources/libraries/python/IPv4Setup.py b/resources/libraries/python/IPv4Setup.py
index 07089025b0..0220139c04 100644
--- a/resources/libraries/python/IPv4Setup.py
+++ b/resources/libraries/python/IPv4Setup.py
@@ -38,8 +38,7 @@ class IPv4Node(object):
 
         :param prefix_length: Length of network prefix.
         :type prefix_length: int
-
-        :return: Network mask.
+        :returns: Network mask.
         :rtype: str
         """
 
@@ -56,7 +55,7 @@ class IPv4Node(object):
         :type interface: str
         :type address: str
         :type prefix_length: int
-        :return: nothing
+        :returns: nothing
         """
         pass
 
@@ -72,7 +71,7 @@ class IPv4Node(object):
         :type prefix_length: int
         :type gateway: str
         :type interface: str
-        :return: nothing
+        :returns: nothing
         """
         pass
 
@@ -88,7 +87,7 @@ class IPv4Node(object):
         :type prefix_length: int
         :type gateway: str
         :type interface: str
-        :return: nothing
+        :returns: nothing
         """
         pass
 
@@ -110,7 +109,7 @@ class IPv4Node(object):
         :param source_interface: Source interface name.
         :type destination_address: str
         :type source_interface: str
-        :return: nothing
+        :returns: nothing
         """
         pass
 
@@ -125,8 +124,7 @@ class Tg(IPv4Node):
 
         :param cmd: Command to be executed.
         :type cmd: str
-
-        :return: Content of stdout and stderr returned by command.
+        :returns: Content of stdout and stderr returned by command.
         :rtype: tuple
         """
         return exec_cmd_no_error(self.node_info, cmd)
@@ -136,8 +134,7 @@ class Tg(IPv4Node):
 
         :param cmd: Command to be executed.
         :type cmd: str
-
-        :return: Content of stdout and stderr returned by command.
+        :returns: Content of stdout and stderr returned by command.
         :rtype: tuple
         """
         return exec_cmd_no_error(self.node_info, cmd, sudo=True)
@@ -188,7 +185,7 @@ class Dut(IPv4Node):
 
         :param interface: Interface name.
         :type interface: str
-        :return: sw_if_index of the interface or None.
+        :returns: sw_if_index of the interface or None.
         :rtype: int
         """
         return Topology().get_interface_sw_index(self.node_info, interface)
@@ -200,7 +197,7 @@ class Dut(IPv4Node):
         :param args: Parameters to the script.
         :type script: str
         :type args: dict
-        :return: nothing
+        :returns: nothing
         """
         # TODO: check return value
         VatExecutor.cmd_from_template(self.node_info, script, **args)
@@ -255,7 +252,7 @@ def get_node(node_info):
 
     :param node_info: Dictionary containing information on nodes in topology.
     :type node_info: dict
-    :return: Class instance that is derived from Node.
+    :returns: Class instance that is derived from Node.
     """
     if node_info['type'] == NodeType.TG:
         return Tg(node_info)
@@ -277,7 +274,7 @@ class IPv4Setup(object):
         :param nodes_addr: Available nodes IPv4 addresses.
         :type nodes: dict
         :type nodes_addr: dict
-        :return: Affected interfaces as list of (node, interface) tuples.
+        :returns: Affected interfaces as list of (node, interface) tuples.
         :rtype: list
         """
         interfaces = []
@@ -310,7 +307,7 @@ class IPv4Setup(object):
         :type node: dict
         :type iface_key: str
         :type nodes_addr: dict
-        :return: IPv4 address.
+        :returns: IPv4 address.
         :rtype: str
         """
         interface = Topology.get_interface_name(node, iface_key)
diff --git a/resources/libraries/python/IPv6Setup.py b/resources/libraries/python/IPv6Setup.py
index 25e8c47ec5..60e10a34e4 100644
--- a/resources/libraries/python/IPv6Setup.py
+++ b/resources/libraries/python/IPv6Setup.py
@@ -63,7 +63,7 @@ class IPv6Setup(object):
         :param nodes_addr: Available nodes IPv6 addresses.
         :type nodes: dict
         :type nodes_addr: dict
-        :return: Affected interfaces as list of (node, interface) tuples.
+        :returns: Affected interfaces as list of (node, interface) tuples.
         :rtype: list
         """
         interfaces = []
@@ -169,7 +169,6 @@ class IPv6Setup(object):
         :type addr: str
         :type prefix: str
         """
-        topo = Topology()
         sw_if_index = Topology.get_interface_sw_index(node, iface_key)
         with VatTerminal(node) as vat:
             vat.vat_terminal_exec_cmd_from_template('add_ip_address.vat',
@@ -266,7 +265,7 @@ class IPv6Setup(object):
         :param nodes_addr: Available nodes IPv6 addresses.
         :type link: str
         :type nodes_addr: dict
-        :return: Link IPv6 address.
+        :returns: Link IPv6 address.
         :rtype: str
         """
         net = nodes_addr.get(link)
@@ -282,7 +281,7 @@ class IPv6Setup(object):
         :param nodes_addr: Available nodes IPv6 addresses.
         :type link: str
         :type nodes_addr: dict
-        :return: Link IPv6 address prefix.
+        :returns: Link IPv6 address prefix.
         :rtype: int
         """
         net = nodes_addr.get(link)
diff --git a/resources/libraries/python/LispSetup.py b/resources/libraries/python/LispSetup.py
index 85749955e7..5ef8bc06a9 100644
--- a/resources/libraries/python/LispSetup.py
+++ b/resources/libraries/python/LispSetup.py
@@ -610,21 +610,21 @@ class LispEidTableMap(object):
     """
 
     @staticmethod
-    def vpp_lisp_eid_table_mapping(node, vni, bd=None, vrf=None):
+    def vpp_lisp_eid_table_mapping(node, vni, bd_id=None, vrf=None):
         """
         Map LISP VNI to either bridge domain ID, or VRF ID.
 
         :param node: VPP node.
         :param vni: Lisp VNI.
-        :param bd: Bridge domain ID.
+        :param bd_id: Bridge domain ID.
         :param vrf: VRF id.
         :type node: dict
         :type vni: int
-        :type bd: int
+        :type bd_id: int
         :type vrf: int
         """
-        if bd:
-            bd_or_vrf = 'bd_index {}'.format(bd)
+        if bd_id:
+            bd_or_vrf = 'bd_index {}'.format(bd_id)
         else:
             bd_or_vrf = 'vrf {}'.format(vrf)
         VatExecutor.cmd_from_template(node,
diff --git a/resources/libraries/python/LispUtil.py b/resources/libraries/python/LispUtil.py
index 556ae1b289..2926d01dfb 100644
--- a/resources/libraries/python/LispUtil.py
+++ b/resources/libraries/python/LispUtil.py
@@ -30,7 +30,7 @@ class LispUtil(object):
 
         :param node: VPP node.
         :type node: dict
-        :return: Lisp gpe state.
+        :returns: Lisp gpe state.
         :rtype: list
         """
 
@@ -48,7 +48,7 @@ class LispUtil(object):
         retrieved - local, remote, empty string = both.
         :type node: dict
         :type items_filter: str
-        :return: Lisp locator_set data as python list.
+        :returns: Lisp locator_set data as python list.
         :rtype: list
         """
 
@@ -66,7 +66,7 @@ class LispUtil(object):
 
         :param node: VPP node.
         :type node: dict
-        :return: Lisp eid table as python list.
+        :returns: Lisp eid table as python list.
         :rtype: list
         """
 
@@ -80,7 +80,7 @@ class LispUtil(object):
 
         :param node: VPP node.
         :type node: dict
-        :return: Lisp map resolver as python list.
+        :returns: Lisp map resolver as python list.
         :rtype: list
         """
 
@@ -135,7 +135,7 @@ class LispUtil(object):
         :param locator_set_number: Generate n locator_set.
         :type node: dict
         :type locator_set_number: str
-        :return: list of lisp locator_set, list of lisp locator_set expected
+        :returns: list of lisp locator_set, list of lisp locator_set expected
         from VAT.
         :rtype: tuple
         """
@@ -181,7 +181,7 @@ class LispUtil(object):
         :param locator_set_number: Generate n locator_set.
         :type node: dict
         :type locator_set_number: str
-        :return: list of lisp locator_set, list of lisp locator_set expected
+        :returns: list of lisp locator_set, list of lisp locator_set expected
         from VAT.
         :rtype: tuple
         """
@@ -211,7 +211,7 @@ class LispUtil(object):
                     locator_set_list.append(locator_set)
 
                     locator_set_vat = {"ls_name": l_name,
-                               "ls_index": num}
+                                       "ls_index": num}
                     locator_set_list_vat.append(locator_set_vat)
 
         return locator_set_list, locator_set_list_vat
diff --git a/resources/libraries/python/Map.py b/resources/libraries/python/Map.py
index a1db3a8461..a066567ab2 100644
--- a/resources/libraries/python/Map.py
+++ b/resources/libraries/python/Map.py
@@ -44,7 +44,7 @@ class Map(object):
         :type psid_offset: int
         :type psid_len: int
         :type map_t: bool
-        :return: Index of created map domain.
+        :returns: Index of created map domain.
         :rtype: int
         :raises RuntimeError: If unable to add map domain.
         """
@@ -124,8 +124,7 @@ class Map(object):
         :type port: int
         :type psid_len: int
         :type psid_offset: int
-
-        :return: PSID.
+        :returns: PSID.
         :rtype: int
         """
         ones = 2**16-1
@@ -149,10 +148,10 @@ class Map(object):
         :type ea_bit_len: int
         :type psid_len: int
         :type psid: int
-        :return: Number representing EA bit field of destination IPv6 address.
+        :returns: Number representing EA bit field of destination IPv6 address.
         :rtype: int
         """
-        v4_suffix_len = ipv4_net._max_prefixlen - ipv4_net.prefixlen
+        v4_suffix_len = ipv4_net.max_prefixlen - ipv4_net.prefixlen
         v4_suffix = ipv4_net.network_address._ip ^ ipv4_host._ip
 
         if ipv4_net.prefixlen + ea_bit_len <= 32:
@@ -181,12 +180,12 @@ class Map(object):
         :type dst_ip: ipaddress.IPv4Address
         :type ea_bit_len: int
         :type psid: int
-        :return: Number representing interface id field of destination IPv6
+        :returns: Number representing interface id field of destination IPv6
         address.
         :rtype: int
         """
         if rule_net.prefixlen + ea_bit_len < 32:
-            v4_suffix_len = rule_net._max_prefixlen - rule_net.prefixlen
+            v4_suffix_len = rule_net.max_prefixlen - rule_net.prefixlen
             v4_suffix = rule_net.network_address._ip ^ dst_ip._ip
             ea_bits = v4_suffix >> (v4_suffix_len - ea_bit_len)
             address = rule_net.network_address._ip >> v4_suffix_len
@@ -194,12 +193,8 @@ class Map(object):
             address |= ea_bits
             address <<= 32 - rule_net.prefixlen - ea_bit_len
             address <<= 16
-            # psid_field = 0
-            # address = address | psid_field
         elif rule_net.prefixlen + ea_bit_len == 32:
             address = dst_ip._ip << 16
-            # psid_field = 0
-            # address = address | psid_field
         else:
             address = dst_ip._ip << 16
             address |= psid
@@ -235,22 +230,20 @@ class Map(object):
         :type psid_len: int
         :type ipv4_dst: str
         :type dst_port: int
-        :return: Computed IPv6 address.
+        :returns: Computed IPv6 address.
         :rtype: str
         """
         ipv6_net = ipaddress.ip_network(unicode(ipv6_pfx))
         ipv4_net = ipaddress.ip_network(unicode(ipv4_pfx))
         ipv4_host = ipaddress.ip_address(unicode(ipv4_dst))
 
-        ipv6_host_len = ipv6_net._max_prefixlen - ipv6_net.prefixlen
-        ipv4_host_len = ipv4_net._max_prefixlen - ipv4_net.prefixlen
+        ipv6_host_len = ipv6_net.max_prefixlen - ipv6_net.prefixlen
         end_user_v6_pfx_len = ipv6_net.prefixlen + ea_bit_len
         psid = Map.get_psid_from_port(dst_port, psid_len, psid_offset)
 
         rule_v6_pfx = ipv6_net.network_address._ip >> ipv6_host_len
         ea_bits = Map._make_ea_bits(ipv4_net, ipv4_host, ea_bit_len, psid_len,
                                     psid)
-        subnet_id = 0
         interface_id = Map._make_interface_id(ipv4_net, ipv4_host, ea_bit_len,
                                               psid)
 
@@ -276,7 +269,7 @@ class Map(object):
         :param ipv4_src: IPv4 source address
         :type ipv6_pfx: str
         :type ipv4_src: str
-        :return: IPv6 address, combination of IPv6 prefix and IPv4 address.
+        :returns: IPv6 address, combination of IPv6 prefix and IPv4 address.
         :rtype: str
         """
         ipv6_net = ipaddress.ip_network(unicode(ipv6_pfx))
diff --git a/resources/libraries/python/NodePath.py b/resources/libraries/python/NodePath.py
index dfcee4d720..8ee29b234d 100644
--- a/resources/libraries/python/NodePath.py
+++ b/resources/libraries/python/NodePath.py
@@ -101,7 +101,6 @@ class NodePath(object):
         .. note:: First add at least two nodes to the topology.
         """
         nodes = self._nodes
-        nodes_filer = self._nodes_filter
         if len(nodes) < 2:
             raise RuntimeError('Not enough nodes to compute path')
 
@@ -144,7 +143,7 @@ class NodePath(object):
     def next_interface(self):
         """Path interface iterator.
 
-        :return: Interface and node or None if not next interface.
+        :returns: Interface and node or None if not next interface.
         :rtype: tuple (str, dict)
 
         .. note:: Call compute_path before.
@@ -157,7 +156,7 @@ class NodePath(object):
     def first_interface(self):
         """Return first interface on the path.
 
-        :return: Interface and node.
+        :returns: Interface and node.
         :rtype: tuple (str, dict)
 
         .. note:: Call compute_path before.
@@ -169,7 +168,7 @@ class NodePath(object):
     def last_interface(self):
         """Return last interface on the path.
 
-        :return: Interface and node.
+        :returns: Interface and node.
         :rtype: tuple (str, dict)
 
         .. note:: Call compute_path before.
@@ -181,7 +180,7 @@ class NodePath(object):
     def first_ingress_interface(self):
         """Return first ingress interface on the path.
 
-        :return: Interface and node.
+        :returns: Interface and node.
         :rtype: tuple (str, dict)
 
         .. note:: Call compute_path before.
@@ -193,7 +192,7 @@ class NodePath(object):
     def last_egress_interface(self):
         """Return last egress interface on the path.
 
-        :return: Interface and node.
+        :returns: Interface and node.
         :rtype: tuple (str, dict)
 
         .. note:: Call compute_path before.
diff --git a/resources/libraries/python/PacketVerifier.py b/resources/libraries/python/PacketVerifier.py
index bbfdfe8688..793a8feb4b 100644
--- a/resources/libraries/python/PacketVerifier.py
+++ b/resources/libraries/python/PacketVerifier.py
@@ -51,7 +51,7 @@
       chksum    = 0xa607
       src       = 11.11.11.11
       dst       = 11.11.11.10
-      \options   \
+      options
     ###[ ICMP ]###
       type      = echo-reply
       code      = 0
@@ -74,7 +74,8 @@ from scapy.layers.inet6 import IPv6
 __all__ = ['RxQueue', 'TxQueue', 'Interface', 'create_gratuitous_arp_request',
            'auto_pad', 'checksum_equal']
 
-# TODO: http://stackoverflow.com/questions/320232/ensuring-subprocesses-are-dead-on-exiting-python-program
+# TODO: http://stackoverflow.com/questions/320232/
+# ensuring-subprocesses-are-dead-on-exiting-python-program
 
 
 class PacketVerifier(object):
@@ -97,7 +98,7 @@ def extract_one_packet(buf):
 
     :param buf: String representation of incoming packet buffer.
     :type buf: str
-    :return: String representation of first packet in buf.
+    :returns: String representation of first packet in buf.
     :rtype: str
     """
     pkt_len = 0
@@ -105,11 +106,6 @@ def extract_one_packet(buf):
     if len(buf) < 60:
         return None
 
-    # print
-    # print buf.__repr__()
-    # print Ether(buf).__repr__()
-    # print len(Ether(buf))
-    # print
     try:
         ether_type = Ether(buf[0:14]).type
     except AttributeError:
@@ -182,7 +178,7 @@ def packet_reader(interface_name, queue):
     :param queue: Queue in which this function will push incoming packets.
     :type interface_name: str
     :type queue: multiprocessing.Queue
-    :return: None
+    :returns: None
     """
     sock = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, ETH_P_ALL)
     sock.bind((interface_name, ETH_P_ALL))
@@ -218,7 +214,7 @@ class RxQueue(PacketVerifier):
         :type ignore: list
         :type verbose: bool
 
-        :return: Ether() initialized object from packet data.
+        :returns: Ether() initialized object from packet data.
         :rtype: scapy.Ether
         """
         (rlist, _, _) = select.select([self._sock], [], [], timeout)
@@ -227,7 +223,7 @@ class RxQueue(PacketVerifier):
 
         pkt = self._sock.recv(0x7fff)
         pkt_pad = auto_pad(pkt)
-        print 'Received packet on {0} of len {1}'.format(self._ifname, len(pkt))
+        print'Received packet on {0} of len {1}'.format(self._ifname, len(pkt))
         if verbose:
             Ether(pkt).show2()
             print
@@ -299,7 +295,7 @@ class Interface(object):
 
         :param timeout: Timeout value in seconds.
         :type timeout: int
-        :return: Ether() initialized object from packet data.
+        :returns: Ether() initialized object from packet data.
         :rtype: scapy.Ether
         """
         return self.rxq.recv(timeout, self.sent_packets)
@@ -332,7 +328,7 @@ def checksum_equal(chksum1, chksum2):
     :type chksum1: uint16
     :type chksum2: uint16
 
-    :return: True if checksums are equivalent, False otherwise.
+    :returns: True if checksums are equivalent, False otherwise.
     :rtype: boolean
     """
     if chksum1 == 0xFFFF:
diff --git a/resources/libraries/python/Policer.py b/resources/libraries/python/Policer.py
index 6098ac0402..b95fd739fc 100644
--- a/resources/libraries/python/Policer.py
+++ b/resources/libraries/python/Policer.py
@@ -22,7 +22,6 @@ from resources.libraries.python.VatJsonUtil import VatJsonUtil
 from resources.libraries.python.topology import Topology
 
 
-# pylint: disable=too-few-public-methods
 class PolicerRateType(Enum):
     """Policer rate types."""
     KBPS = 'kbps'
@@ -111,7 +110,6 @@ class PolicerClassifyTableType(Enum):
 
 
 # pylint: disable=too-many-instance-attributes
-# pylint: disable=too-many-public-methods
 class Policer(object):
     """Policer utilities."""
 
@@ -175,7 +173,6 @@ class Policer(object):
                                             exceed_action=exceed_action,
                                             violate_action=violate_action,
                                             color_aware=color_aware)
-        # pylint: enable=no-member
 
         VatJsonUtil.verify_vat_retval(
             out[0],
@@ -187,7 +184,7 @@ class Policer(object):
         # create classify table
         direction = 'src' if self._classify_match_is_src else 'dst'
 
-        if 6 == ip_address(unicode(self._classify_match_ip)).version:
+        if ip_address(unicode(self._classify_match_ip)).version == 6:
             ip_version = 'ip6'
             table_type = PolicerClassifyTableType.IP6_TABLE
         else:
diff --git a/resources/libraries/python/Routing.py b/resources/libraries/python/Routing.py
index 73c58e2053..2da7c1ac8d 100644
--- a/resources/libraries/python/Routing.py
+++ b/resources/libraries/python/Routing.py
@@ -21,7 +21,6 @@ from resources.libraries.python.ssh import exec_cmd_no_error
 class Routing(object):
     """Routing utilities."""
 
-    # pylint: disable=too-many-arguments
     @staticmethod
     def vpp_route_add(node, network, prefix_len, gateway=None,
                       interface=None, use_sw_index=True, resolve_attempts=10,
diff --git a/resources/libraries/python/SetupFramework.py b/resources/libraries/python/SetupFramework.py
index 5d3d59ab56..82c4ae2a65 100644
--- a/resources/libraries/python/SetupFramework.py
+++ b/resources/libraries/python/SetupFramework.py
@@ -71,7 +71,7 @@ def copy_tarball_to_node(tarball, node):
     :param node: Dictionary created from topology.
     :type tarball: str
     :type node: dict
-    :return: nothing
+    :returns: nothing
     """
     logger.console('Copying tarball to {0}'.format(node['host']))
     ssh = SSH()
@@ -89,7 +89,7 @@ def extract_tarball_at_node(tarball, node):
     :param node: Dictionary created from topology.
     :type tarball: str
     :type node: dict
-    :return: nothing
+    :returns: nothing
     """
     logger.console('Extracting tarball to {0} on {1}'.format(
         con.REMOTE_FW_DIR, node['host']))
@@ -133,8 +133,7 @@ def setup_node(args):
 
     :param args: All parameters needed to setup one node.
     :type args: tuple
-    :return: nothing
-    :return: True - success, False - error
+    :returns: True - success, False - error
     :rtype: bool
     """
     tarball, remote_tarball, node = args
@@ -156,12 +155,12 @@ def delete_local_tarball(tarball):
 
     :param tarball: Path to tarball to upload.
     :type tarball: str
-    :return: nothing
+    :returns: nothing
     """
     call(split('sh -c "rm {0} > /dev/null 2>&1"'.format(tarball)))
 
 
-class SetupFramework(object):  # pylint: disable=too-few-public-methods
+class SetupFramework(object):
     """Setup suite run on topology nodes.
 
     Many VAT/CLI based tests need the scripts at remote hosts before executing
@@ -199,4 +198,3 @@ class SetupFramework(object):  # pylint: disable=too-few-public-methods
         logger.trace('Test framework copied to all topology nodes')
         delete_local_tarball(tarball)
         logger.console('All nodes are ready')
-
diff --git a/resources/libraries/python/Trace.py b/resources/libraries/python/Trace.py
index 49b39cbdfb..c61a8deda4 100644
--- a/resources/libraries/python/Trace.py
+++ b/resources/libraries/python/Trace.py
@@ -11,14 +11,22 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+"""Packet trace library."""
+
 from resources.libraries.python.VatExecutor import VatExecutor
 from resources.libraries.python.topology import NodeType
 
 
 class Trace(object):
+    """This class provides methods to manipulate the VPP packet trace."""
 
     @staticmethod
     def show_packet_trace_on_all_duts(nodes):
+        """Show VPP packet trace.
+
+        :param nodes: Nodes from which the packet trace will be displayed.
+        :type nodes: list
+        """
         for node in nodes.values():
             if node['type'] == NodeType.DUT:
                 vat = VatExecutor()
@@ -26,8 +34,12 @@ class Trace(object):
 
     @staticmethod
     def clear_packet_trace_on_all_duts(nodes):
+        """Clear VPP packet trace.
+
+        :param nodes: Nodes where the packet trace will be cleared.
+        :type nodes: list
+        """
         for node in nodes.values():
             if node['type'] == NodeType.DUT:
                 vat = VatExecutor()
                 vat.execute_script("clear_trace.vat", node, json_out=False)
-
diff --git a/resources/libraries/python/TrafficGenerator.py b/resources/libraries/python/TrafficGenerator.py
index 87437d8284..8d187c92dc 100644
--- a/resources/libraries/python/TrafficGenerator.py
+++ b/resources/libraries/python/TrafficGenerator.py
@@ -56,9 +56,9 @@ class TGDropRateSearchImpl(DropRateSearch):
         tg_instance = BuiltIn().get_library_instance(
             'resources.libraries.python.TrafficGenerator')
 
-        if tg_instance._node['subtype'] is None:
+        if tg_instance.node['subtype'] is None:
             raise RuntimeError('TG subtype not defined')
-        elif tg_instance._node['subtype'] == NodeSubTypeTG.TREX:
+        elif tg_instance.node['subtype'] == NodeSubTypeTG.TREX:
             unit_rate = str(rate) + self.get_rate_type_str()
             tg_instance.trex_stl_start_remote_exec(self.get_duration(),
                                                    unit_rate, frame_size,
@@ -88,6 +88,7 @@ class TGDropRateSearchImpl(DropRateSearch):
             'resources.libraries.python.TrafficGenerator')
         return tg_instance.get_latency_int()
 
+
 class TrafficGenerator(object):
     """Traffic Generator."""
 
@@ -104,6 +105,15 @@ class TrafficGenerator(object):
         # T-REX interface order mapping
         self._ifaces_reordered = 0
 
+    @property
+    def node(self):
+        """Getter.
+
+        :returns: Traffic generator node.
+        :rtype: dict
+        """
+        return self._node
+
     def get_loss(self):
         """Return number of lost packets.
 
diff --git a/resources/libraries/python/VPPUtil.py b/resources/libraries/python/VPPUtil.py
index 32e1bb4e7b..da59d1958d 100644
--- a/resources/libraries/python/VPPUtil.py
+++ b/resources/libraries/python/VPPUtil.py
@@ -26,7 +26,7 @@ class VPPUtil(object):
 
         :param node: VPP node.
         :param additional_cmds: Additional commands that the vpp should print
-         settings for.
+        settings for.
         :type node: dict
         :type additional_cmds: tuple
         """
@@ -44,9 +44,5 @@ class VPPUtil(object):
                 def_setting_tb_displayed['Custom Setting: {}'.format(cmd)] = cmd
         ssh = SSH()
         ssh.connect(node)
-        print("=" * 40)
-        for key, value in def_setting_tb_displayed.iteritems():
-            (_, stdout, _) = ssh.exec_command_sudo('vppctl sh {}'.format(value))
-            print("{} : {} \n".format(key, value))
-            print(stdout)
-            print("=" * 40)
+        for _, value in def_setting_tb_displayed.items():
+            ssh.exec_command_sudo('vppctl sh {}'.format(value))
diff --git a/resources/libraries/python/VatExecutor.py b/resources/libraries/python/VatExecutor.py
index 03b7321020..bbce83d1ad 100644
--- a/resources/libraries/python/VatExecutor.py
+++ b/resources/libraries/python/VatExecutor.py
@@ -30,7 +30,7 @@ def cleanup_vat_json_output(json_output):
     Clean up VAT JSON output from clutter like vat# prompts and such.
 
     :param json_output: Cluttered JSON output.
-    :return: Cleaned up output JSON string.
+    :returns: Cleaned up output JSON string.
     """
 
     retval = json_output
@@ -187,9 +187,8 @@ class VatTerminal(object):
         """
         logger.debug("Executing command in VAT terminal: {}".format(cmd))
         try:
-            out = self._ssh.interactive_terminal_exec_command(self._tty,
-                                                          cmd,
-                                                          self.__VAT_PROMPT)
+            out = self._ssh.interactive_terminal_exec_command(self._tty, cmd,
+                                                              self.__VAT_PROMPT)
         except:
             self._exec_failure = True
             raise
@@ -201,10 +200,10 @@ class VatTerminal(object):
             array_start = out.find('[')
             array_end = out.rfind(']')
 
-            if -1 == obj_start and -1 == array_start:
+            if obj_start == -1 and array_start == -1:
                 raise RuntimeError("VAT: no JSON data.")
 
-            if obj_start < array_start or -1 == array_start:
+            if obj_start < array_start or array_start == -1:
                 start = obj_start
                 end = obj_end + 1
             else:
diff --git a/resources/libraries/python/VppCounters.py b/resources/libraries/python/VppCounters.py
index e755c75673..6b2265db27 100644
--- a/resources/libraries/python/VppCounters.py
+++ b/resources/libraries/python/VppCounters.py
@@ -152,7 +152,7 @@ class VppCounters(object):
 
         :param node: Node to dump stats table on.
         :type node: dict
-        :return: Stats table.
+        :returns: Stats table.
         """
         with VatTerminal(node) as vat:
             vat.vat_terminal_exec_cmd('want_stats enable')
@@ -166,9 +166,27 @@ class VppCounters(object):
             return None
 
     def vpp_get_ipv4_interface_counter(self, node, interface):
+        """
+
+        :param node: Node to get interface IPv4 counter on.
+        :param interface: Interface name.
+        :type node: dict
+        :type interface: str
+        :returns: Interface IPv4 counter.
+        :rtype: int
+        """
         return self.vpp_get_ipv46_interface_counter(node, interface, False)
 
     def vpp_get_ipv6_interface_counter(self, node, interface):
+        """
+
+        :param node: Node to get interface IPv6 counter on.
+        :param interface: Interface name.
+        :type node: dict
+        :type interface: str
+        :returns: Interface IPv6 counter.
+        :rtype: int
+        """
         return self.vpp_get_ipv46_interface_counter(node, interface, True)
 
     def vpp_get_ipv46_interface_counter(self, node, interface, is_ipv6=True):
@@ -180,7 +198,7 @@ class VppCounters(object):
         :type node: dict
         :type interface: str
         :type is_ipv6: bool
-        :return: Interface IPv4/IPv6 counter.
+        :returns: Interface IPv4/IPv6 counter.
         :rtype: int
         """
         version = 'ip6' if is_ipv6 else 'ip4'
diff --git a/resources/libraries/python/constants.py b/resources/libraries/python/constants.py
index 2978f46759..a280b51beb 100644
--- a/resources/libraries/python/constants.py
+++ b/resources/libraries/python/constants.py
@@ -11,8 +11,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+"""Constants used in CSIT."""
+
 
 class Constants(object):
+    """Constants used in CSIT."""
+
     # OpenVPP testing directory location at topology nodes
     REMOTE_FW_DIR = '/tmp/openvpp-testing'
 
diff --git a/resources/libraries/python/honeycomb/HcAPIKwACL.py b/resources/libraries/python/honeycomb/HcAPIKwACL.py
index 8d1746d0ad..0cde6d4824 100644
--- a/resources/libraries/python/honeycomb/HcAPIKwACL.py
+++ b/resources/libraries/python/honeycomb/HcAPIKwACL.py
@@ -289,8 +289,7 @@ class ACLKeywords(object):
         suffix_dict = {"l2": "eth",
                        "l3_ip4": "ipv4",
                        "l3_ip6": "ipv6",
-                       "mixed": "mixed"
-                       }
+                       "mixed": "mixed"}
         try:
             suffix = suffix_dict[layer]
         except KeyError:
@@ -385,8 +384,8 @@ class ACLKeywords(object):
             }
         except KeyError:
             raise ValueError("Unknown network layer {0}. "
-                             "Valid options are: {1}".format(
-                                layer, layers.keys()))
+                             "Valid options are: {1}".
+                             format(layer, layers.keys()))
 
         status_code, resp = HcUtil.put_honeycomb_data(
             node, "config_vpp_interfaces", data, path)
diff --git a/resources/libraries/python/honeycomb/HcAPIKwInterfaces.py b/resources/libraries/python/honeycomb/HcAPIKwInterfaces.py
index 01a2eba0ad..5658eea146 100644
--- a/resources/libraries/python/honeycomb/HcAPIKwInterfaces.py
+++ b/resources/libraries/python/honeycomb/HcAPIKwInterfaces.py
@@ -27,8 +27,6 @@ from resources.libraries.python.honeycomb.HoneycombUtil \
     import HoneycombUtil as HcUtil
 
 
-# pylint: disable=too-many-public-methods
-# pylint: disable=too-many-lines
 class InterfaceKeywords(object):
     """Keywords for Interface manipulation.
 
@@ -1291,7 +1289,7 @@ class InterfaceKeywords(object):
             node, super_interface, path, address)
 
     @staticmethod
-    def remove_all_ipv4_addresses_from_sub_interface(node, super_interface, # pylint: disable=invalid-name
+    def remove_all_ipv4_addresses_from_sub_interface(node, super_interface,
                                                      identifier):
         """Remove all ipv4 addresses from the specified sub-interface.
 
diff --git a/resources/libraries/python/honeycomb/HoneycombUtil.py b/resources/libraries/python/honeycomb/HoneycombUtil.py
index f607c2439a..747c9dae8e 100644
--- a/resources/libraries/python/honeycomb/HoneycombUtil.py
+++ b/resources/libraries/python/honeycomb/HoneycombUtil.py
@@ -126,7 +126,7 @@ class HoneycombUtil(object):
         :param url_file: URL file. The argument contains only the name of file
         without extension, not the full path.
         :type url_file: str
-        :return: Requested path.
+        :returns: Requested path.
         :rtype: str
         """
 
@@ -178,7 +178,7 @@ class HoneycombUtil(object):
         :param path: Path to data we want to find.
         :type data: dict
         :type path: tuple
-        :return: Data represented by path.
+        :returns: Data represented by path.
         :rtype: str, dict, or list
         :raises HoneycombError: If the data has not been found.
         """
@@ -205,7 +205,7 @@ class HoneycombUtil(object):
         :param path: Path to data we want to remove.
         :type data: dict
         :type path: tuple
-        :return: Original data without removed part.
+        :returns: Original data without removed part.
         :rtype: dict
         """
 
@@ -245,7 +245,7 @@ class HoneycombUtil(object):
         :type data: dict
         :type path: tuple
         :type new_value: str, dict or list
-        :return: Original data with the new value.
+        :returns: Original data with the new value.
         :rtype: dict
         """
 
@@ -295,14 +295,14 @@ class HoneycombUtil(object):
         :type node: dict
         :type url_file: str
         :type path: str
-        :return: Status code and content of response.
+        :returns: Status code and content of response.
         :rtype tuple
         """
 
         base_path = HoneycombUtil.read_path_from_url_file(url_file)
         path = base_path + path
         status_code, resp = HTTPRequest.get(node, path)
-        (status_node, response) = status_code, loads(resp)
+        response = loads(resp)
         if status_code != HTTPCodes.OK:
             HoneycombUtil.read_log_tail(node)
         return status_code, response
@@ -324,7 +324,7 @@ class HoneycombUtil(object):
         :type data: dict, str
         :type path: str
         :type data_representation: DataRepresentation
-        :return: Status code and content of response.
+        :returns: Status code and content of response.
         :rtype: tuple
         :raises HoneycombError: If the given data representation is not defined
         in HEADERS.
@@ -368,7 +368,7 @@ class HoneycombUtil(object):
         :type data: dict, str
         :type data_representation: DataRepresentation
         :type timeout: int
-        :return: Status code and content of response.
+        :returns: Status code and content of response.
         :rtype: tuple
         :raises HoneycombError: If the given data representation is not defined
         in HEADERS.
@@ -401,7 +401,7 @@ class HoneycombUtil(object):
         :type node: dict
         :type url_file: str
         :type path: str
-        :return: Status code and content of response.
+        :returns: Status code and content of response.
         :rtype tuple
         """
 
@@ -422,7 +422,7 @@ class HoneycombUtil(object):
         :param lines: Number of lines to read.
         :type node: dict
         :type lines: int
-        :return: Last N log lines.
+        :returns: Last N log lines.
         :rtype: str
         """
 
diff --git a/resources/libraries/python/honeycomb/Netconf.py b/resources/libraries/python/honeycomb/Netconf.py
index 3c98387334..e3cdbe5dce 100644
--- a/resources/libraries/python/honeycomb/Netconf.py
+++ b/resources/libraries/python/honeycomb/Netconf.py
@@ -14,10 +14,10 @@
 """Keywords used to connect to Honeycomb through Netconf, send messages
  and receive replies."""
 
+import socket
 from time import time
 
 import paramiko
-import socket
 from robot.api import logger
 from interruptingcow import timeout
 
@@ -61,8 +61,7 @@ class Netconf(object):
                        password=node['honeycomb']['passwd'],
                        pkey=None,
                        port=node['honeycomb']['netconf_port'],
-                       timeout=time_out,
-                       )
+                       timeout=time_out)
 
         logger.trace('Connect took {0} seconds'.format(time() - start))
         logger.debug('New ssh: {0}'.format(client))
@@ -102,7 +101,7 @@ class Netconf(object):
         :type size:int
         :type time_out:int
         :type err:str
-        :return: Content of response.
+        :returns: Content of response.
         :rtype: str
         :raises HoneycombError: If the read process times out.
         """
@@ -123,13 +122,11 @@ class Netconf(object):
                             break
                     except socket.timeout:
                         raise HoneycombError("Socket timeout.",
-                                             enable_logging=False
-                                             )
+                                             enable_logging=False)
 
         except RuntimeError:
             raise HoneycombError(err + " Content of buffer: {0}".format(reply),
-                                 enable_logging=False
-                                 )
+                                 enable_logging=False)
 
         logger.trace(reply)
         return reply.replace(self.delimiter, "")
@@ -142,7 +139,7 @@ class Netconf(object):
         :param time_out: Timeout value for getting the complete response.
         :type size:int
         :type time_out:int
-        :return: Content of response.
+        :returns: Content of response.
         :rtype: str
         """
 
diff --git a/resources/libraries/python/parsers/__init__.py b/resources/libraries/python/parsers/__init__.py
index 5a0e0e1c5e..1b58a3cf17 100644
--- a/resources/libraries/python/parsers/__init__.py
+++ b/resources/libraries/python/parsers/__init__.py
@@ -10,3 +10,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+"""
+__init__ file for resources/libraries/python/parsers
+"""
diff --git a/resources/libraries/python/ssh.py b/resources/libraries/python/ssh.py
index 4b3838bbb7..90ac0be2dc 100644
--- a/resources/libraries/python/ssh.py
+++ b/resources/libraries/python/ssh.py
@@ -301,7 +301,7 @@ def exec_cmd(node, cmd, timeout=600, sudo=False):
     ssh = SSH()
     try:
         ssh.connect(node)
-    except Exception as err:
+    except SSHException as err:
         logger.error("Failed to connect to node" + str(err))
         return None, None, None
 
@@ -311,7 +311,7 @@ def exec_cmd(node, cmd, timeout=600, sudo=False):
         else:
             (ret_code, stdout, stderr) = ssh.exec_command_sudo(cmd,
                                                                timeout=timeout)
-    except Exception as err:
+    except SSHException as err:
         logger.error(err)
         return None, None, None
 
diff --git a/resources/libraries/python/telemetry/IPFIXUtil.py b/resources/libraries/python/telemetry/IPFIXUtil.py
index 1b193f8325..2f83760759 100644
--- a/resources/libraries/python/telemetry/IPFIXUtil.py
+++ b/resources/libraries/python/telemetry/IPFIXUtil.py
@@ -86,8 +86,7 @@ class IPFIXHeader(Packet):
                    IntField("Sequence Number", 0),
                    IntField("Observation Domain ID", 0),
                    ShortField("Set_ID", 0),
-                   ShortField("Set_Length", 0)
-                   ]
+                   ShortField("Set_Length", 0)]
 
 
 class IPFIXTemplate(Packet):
@@ -96,8 +95,7 @@ class IPFIXTemplate(Packet):
     fields_desc = [ShortField("Template_ID", 256),
                    ShortField("nFields", 2),
                    FieldListField("Template", [], ShortField("type_len", ""),
-                                  count_from=lambda p: p.nFields*2)
-                   ]
+                                  count_from=lambda p: p.nFields*2)]
 
 
 class IPFIXData(Packet):
diff --git a/resources/libraries/python/telemetry/SPAN.py b/resources/libraries/python/telemetry/SPAN.py
index aff465c0ea..41ff7d34f1 100644
--- a/resources/libraries/python/telemetry/SPAN.py
+++ b/resources/libraries/python/telemetry/SPAN.py
@@ -17,7 +17,6 @@ from resources.libraries.python.topology import Topology
 from resources.libraries.python.VatExecutor import VatTerminal
 
 
-# pylint: disable=too-few-public-methods
 class SPAN(object):
     """Class contains methods for setting up SPAN mirroring on DUTs."""
 
@@ -43,8 +42,7 @@ class SPAN(object):
         with VatTerminal(node, json_param=False) as vat:
             vat.vat_terminal_exec_cmd_from_template('span_create.vat',
                                                     src_sw_if_index=src_if,
-                                                    dst_sw_if_index=dst_if,
-                                                    )
+                                                    dst_sw_if_index=dst_if)
 
     @staticmethod
     def vpp_get_span_configuration(node):
diff --git a/resources/libraries/python/telemetry/__init__.py b/resources/libraries/python/telemetry/__init__.py
index 5a0e0e1c5e..cc11de329f 100644
--- a/resources/libraries/python/telemetry/__init__.py
+++ b/resources/libraries/python/telemetry/__init__.py
@@ -10,3 +10,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+"""
+__init__ file for resources/libraries/python/telemetry
+"""
diff --git a/resources/libraries/python/topology.py b/resources/libraries/python/topology.py
index 0214cc9c02..8a591dfd14 100644
--- a/resources/libraries/python/topology.py
+++ b/resources/libraries/python/topology.py
@@ -18,7 +18,7 @@ from collections import Counter
 from yaml import load
 
 from robot.api import logger
-from robot.libraries.BuiltIn import BuiltIn
+from robot.libraries.BuiltIn import BuiltIn, RobotNotRunningError
 from robot.api.deco import keyword
 
 __all__ = ["DICT__nodes", 'Topology']
@@ -27,11 +27,11 @@ __all__ = ["DICT__nodes", 'Topology']
 def load_topo_from_yaml():
     """Load topology from file defined in "${TOPOLOGY_PATH}" variable.
 
-    :return: Nodes from loaded topology.
+    :returns: Nodes from loaded topology.
     """
     try:
         topo_path = BuiltIn().get_variable_value("${TOPOLOGY_PATH}")
-    except:
+    except RobotNotRunningError:
         return ''
 
     with open(topo_path) as work_file:
@@ -312,7 +312,7 @@ class Topology(object):
         try:
             if isinstance(iface_key, basestring):
                 return node['interfaces'][iface_key].get('vpp_sw_index')
-            #FIXME: use only iface_key, do not use integer
+            # TODO: use only iface_key, do not use integer
             else:
                 return int(iface_key)
         except (KeyError, ValueError):
diff --git a/resources/libraries/robot/lisp/l2lisp.robot b/resources/libraries/robot/lisp/l2lisp.robot
index 78bca5487c..c393493fa2 100644
--- a/resources/libraries/robot/lisp/l2lisp.robot
+++ b/resources/libraries/robot/lisp/l2lisp.robot
@@ -53,7 +53,7 @@
 | | ... | ${settings['weight']}
 | | Vpp Lisp Eid Table Mapping | ${dut_node}
 | | ... | ${settings['vni']}
-| | ... | bd=${settings['bd']}
+| | ... | bd_id=${settings['bd']}
 | | Vpp Add Lisp Local Eid | ${dut_node}
 | | ... | ${settings['locator_name']}
 | | ... | ${settings['vni']}