diff --git a/sysinv/sysinv/sysinv/pylint.rc b/sysinv/sysinv/sysinv/pylint.rc
index fd25b77f49..7964fb941c 100755
--- a/sysinv/sysinv/sysinv/pylint.rc
+++ b/sysinv/sysinv/sysinv/pylint.rc
@@ -34,7 +34,6 @@ load-plugins=
 # The following warnings should be fixed:
 # fixme (todo, xxx, fixme)
 # W0101: unreachable
-# W0102: dangerous-default-value
 # W0105: pointless-string-statement
 # W0106: expression-not-assigned
 # W0107: unnecessary-pass
@@ -80,7 +79,7 @@ load-plugins=
 # E1124: redundant-keyword-arg
 # E1136: unsubscriptable-object
 # E1205: logging-too-many-args
-disable=C, R, fixme, W0101, W0102, W0105, W0106, W0107, W0108, W0110, W0123, W0150,
+disable=C, R, fixme, W0101, W0105, W0106, W0107, W0108, W0110, W0123, W0150,
         W0201, W0211, W0212, W0221, W0223, W0231, W0235, W0311, W0402, W0403, W0404,
         W0603, W0612, W0613, W0621, W0622, W0631, W0632, W0701, W0703,
         W1113, W1201, W1401, W1505,
diff --git a/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/cluster.py b/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/cluster.py
index 345c0d3538..8952e9be5f 100644
--- a/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/cluster.py
+++ b/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/cluster.py
@@ -336,9 +336,11 @@ class ClusterController(rest.RestController):
 
     @wsme_pecan.wsexpose(ClusterCollection, [Query], types.uuid, types.uuid,
                          int, wtypes.text, wtypes.text)
-    def get_all(self, q=[], parent_uuid=None,
+    def get_all(self, q=None, parent_uuid=None,
                 marker=None, limit=None, sort_key='id', sort_dir='asc'):
         """Retrieve a list of Clusters."""
+        if q is None:
+            q = []
         return self._get_cluster_collection(parent_uuid, marker, limit,
                                             sort_key, sort_dir, q=q)
 
diff --git a/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/kube_app.py b/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/kube_app.py
index c4341d9ae1..1929605277 100644
--- a/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/kube_app.py
+++ b/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/kube_app.py
@@ -455,7 +455,9 @@ class KubeAppHelper(object):
                 "state of the patch(es)."))
         return response
 
-    def _patch_report_app_dependencies(self, name, patches=[]):
+    def _patch_report_app_dependencies(self, name, patches=None):
+        if patches is None:
+            patches = []
         try:
             system = self._dbapi.isystem_get_one()
             patch_api.patch_report_app_dependencies(
diff --git a/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/service_parameter.py b/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/service_parameter.py
index 77e05e04af..ecea2ff88d 100644
--- a/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/service_parameter.py
+++ b/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/service_parameter.py
@@ -198,9 +198,11 @@ class ServiceParameterController(rest.RestController):
     @wsme_pecan.wsexpose(ServiceParameterCollection, [Query],
                          types.uuid, wtypes.text,
                          wtypes.text, wtypes.text, wtypes.text)
-    def get_all(self, q=[], marker=None, limit=None,
+    def get_all(self, q=None, marker=None, limit=None,
                 sort_key='id', sort_dir='asc'):
         """Retrieve a list of service parameters."""
+        if q is None:
+            q = []
         sort_key = ['section', 'name']
         return self._get_service_parameter_collection(marker, limit,
                                                       sort_key,
diff --git a/sysinv/sysinv/sysinv/sysinv/api/middleware/auth_token.py b/sysinv/sysinv/sysinv/sysinv/api/middleware/auth_token.py
index cb581fc1ec..ca367fb73a 100644
--- a/sysinv/sysinv/sysinv/sysinv/api/middleware/auth_token.py
+++ b/sysinv/sysinv/sysinv/sysinv/api/middleware/auth_token.py
@@ -33,9 +33,11 @@ class AuthTokenMiddleware(auth_token.AuthProtocol):
     for public routes in the API.
 
     """
-    def __init__(self, app, conf, public_api_routes=[]):
+    def __init__(self, app, conf, public_api_routes=None):
         self._sysinv_app = app
         route_pattern_tpl = '%s(\.json|\.xml)?$'
+        if public_api_routes is None:
+            public_api_routes = []
 
         try:
             self.public_api_routes = [re.compile(route_pattern_tpl % route_tpl)
diff --git a/sysinv/sysinv/sysinv/sysinv/common/extension_manager.py b/sysinv/sysinv/sysinv/sysinv/common/extension_manager.py
index b2be0cac65..c70c0b0751 100644
--- a/sysinv/sysinv/sysinv/sysinv/common/extension_manager.py
+++ b/sysinv/sysinv/sysinv/sysinv/common/extension_manager.py
@@ -57,7 +57,7 @@ class ActivatedExtensionManager(enabled.EnabledExtensionManager):
     """
 
     def __init__(self, namespace, enabled_names, invoke_on_load=True,
-                 invoke_args=(), invoke_kwds={}):
+                 invoke_args=(), invoke_kwds=None):
 
         def local_check_func(ext):
             return should_use_extension(namespace, ext, enabled_names)
@@ -67,5 +67,5 @@ class ActivatedExtensionManager(enabled.EnabledExtensionManager):
             check_func=local_check_func,
             invoke_on_load=invoke_on_load,
             invoke_args=invoke_args,
-            invoke_kwds=invoke_kwds,
+            invoke_kwds=invoke_kwds if invoke_kwds is not None else {},
         )
diff --git a/sysinv/sysinv/sysinv/sysinv/common/health.py b/sysinv/sysinv/sysinv/sysinv/common/health.py
index e3cee2a414..5969a2fe1b 100755
--- a/sysinv/sysinv/sysinv/sysinv/common/health.py
+++ b/sysinv/sysinv/sysinv/sysinv/common/health.py
@@ -121,11 +121,13 @@ class Health(object):
 
         return success, allowed, affecting
 
-    def get_alarms_degrade(self, context, alarm_ignore_list=[],
+    def get_alarms_degrade(self, context, alarm_ignore_list=None,
             entity_instance_id_filter=""):
         """Return all the alarms that cause the degrade"""
         db_alarms = fmclient(context).alarm.list(include_suppress=True)
         degrade_alarms = []
+        if alarm_ignore_list is None:
+            alarm_ignore_list = []
 
         for db_alarm in db_alarms:
             if isinstance(db_alarm, tuple):
diff --git a/sysinv/sysinv/sysinv/sysinv/common/service.py b/sysinv/sysinv/sysinv/sysinv/common/service.py
index 2c8d994b67..f7007e7d6c 100644
--- a/sysinv/sysinv/sysinv/sysinv/common/service.py
+++ b/sysinv/sysinv/sysinv/sysinv/common/service.py
@@ -55,7 +55,9 @@ class PeriodicService(rpc_service.Service, periodic_task.PeriodicTasks):
                           context=admin_context)
 
 
-def prepare_service(argv=[]):
+def prepare_service(argv=None):
+    if argv is None:
+        argv = []
     rpc.set_defaults(control_exchange='sysinv')
     cfg.set_defaults(log.log_opts,
                      default_log_levels=['amqplib=WARN',
diff --git a/sysinv/sysinv/sysinv/sysinv/conductor/kube_app.py b/sysinv/sysinv/sysinv/sysinv/conductor/kube_app.py
index 2d365ff5c4..03f17b1873 100644
--- a/sysinv/sysinv/sysinv/sysinv/conductor/kube_app.py
+++ b/sysinv/sysinv/sysinv/sysinv/conductor/kube_app.py
@@ -2462,11 +2462,14 @@ class DockerHelper(object):
             return None
 
     def make_armada_request(self, request, manifest_file='', overrides_str='',
-                            app_releases=[], logfile=None):
+                            app_releases=None, logfile=None):
 
         if logfile is None:
             logfile = request + '.log'
 
+        if app_releases is None:
+            app_releases = []
+
         rc = True
 
         # Instruct Armada to use the tiller service since it does not properly
diff --git a/sysinv/sysinv/sysinv/sysinv/conductor/manager.py b/sysinv/sysinv/sysinv/sysinv/conductor/manager.py
index 9913125af7..d6b119df49 100644
--- a/sysinv/sysinv/sysinv/sysinv/conductor/manager.py
+++ b/sysinv/sysinv/sysinv/sysinv/conductor/manager.py
@@ -741,7 +741,9 @@ class ConductorManager(service.PeriodicService):
         return line
 
     def _dnsmasq_addn_host_entry_to_string(self, ip_addr, hostname,
-                                           aliases=[]):
+                                           aliases=None):
+        if aliases is None:
+            aliases = []
         line = "%s %s" % (ip_addr, hostname)
         for alias in aliases:
             line = "%s %s" % (line, alias)
@@ -10109,7 +10111,7 @@ class ConductorManager(service.PeriodicService):
         """
         return self._helm.get_helm_application_overrides(app_name, cnamespace)
 
-    def merge_overrides(self, context, file_overrides=[], set_overrides=[]):
+    def merge_overrides(self, context, file_overrides=None, set_overrides=None):
         """Merge the file and set overrides into a single chart overrides.
 
         :param context: request context.
diff --git a/sysinv/sysinv/sysinv/sysinv/conductor/rpcapi.py b/sysinv/sysinv/sysinv/sysinv/conductor/rpcapi.py
index 7b284ed50b..54e98cd2fb 100644
--- a/sysinv/sysinv/sysinv/sysinv/conductor/rpcapi.py
+++ b/sysinv/sysinv/sysinv/sysinv/conductor/rpcapi.py
@@ -1692,7 +1692,7 @@ class ConductorAPI(sysinv.openstack.common.rpc.proxy.RpcProxy):
                                        app_name=app_name,
                                        cnamespace=cnamespace))
 
-    def merge_overrides(self, context, file_overrides=[], set_overrides=[]):
+    def merge_overrides(self, context, file_overrides=None, set_overrides=None):
         """Merge the file and set overrides into a single chart overrides.
 
         :param context: request context.
@@ -1701,6 +1701,10 @@ class ConductorAPI(sysinv.openstack.common.rpc.proxy.RpcProxy):
         :returns: merged overrides string
 
         """
+        if file_overrides is None:
+            file_overrides = []
+        if set_overrides is None:
+            set_overrides = []
         return self.call(context,
                          self.make_msg('merge_overrides',
                                        file_overrides=file_overrides,
diff --git a/sysinv/sysinv/sysinv/sysinv/helm/helm.py b/sysinv/sysinv/sysinv/sysinv/helm/helm.py
index 94087b8445..9dda08a4f0 100644
--- a/sysinv/sysinv/sysinv/sysinv/helm/helm.py
+++ b/sysinv/sysinv/sysinv/sysinv/helm/helm.py
@@ -377,7 +377,7 @@ class HelmOperator(object):
         LOG.debug("Chart %s can be found in repo: %s" % (chart_name, repo))
         return metadata_name, repo, chart_tarfile
 
-    def merge_overrides(self, file_overrides=[], set_overrides=[]):
+    def merge_overrides(self, file_overrides=None, set_overrides=None):
         """ Merge helm overrides together.
 
         :param values: A dict of different types of user override values,
@@ -385,6 +385,10 @@ class HelmOperator(object):
                        'set' (which generally specify one override).
         """
 
+        if file_overrides is None:
+            file_overrides = []
+        if set_overrides is None:
+            set_overrides = []
         # At this point we have potentially two separate types of overrides
         # specified by system or user, values from files and values passed in
         # via --set .  We need to ensure that we call helm using the same
diff --git a/sysinv/sysinv/sysinv/sysinv/helm/openstack.py b/sysinv/sysinv/sysinv/sysinv/helm/openstack.py
index b90c37c907..5d6dd315ff 100644
--- a/sysinv/sysinv/sysinv/sysinv/helm/openstack.py
+++ b/sysinv/sysinv/sysinv/sysinv/helm/openstack.py
@@ -409,7 +409,7 @@ class OpenstackBaseHelm(base.BaseHelm):
 
         return newprivatekey, newpublickey
 
-    def _oslo_multistring_override(self, name=None, values=[]):
+    def _oslo_multistring_override(self, name=None, values=None):
         """
         Generate helm multistring dictionary override for specified option
         name with multiple values.
diff --git a/sysinv/sysinv/sysinv/sysinv/openstack/common/db/exception.py b/sysinv/sysinv/sysinv/sysinv/openstack/common/db/exception.py
index 95f4485dba..2dc92794b6 100644
--- a/sysinv/sysinv/sysinv/sysinv/openstack/common/db/exception.py
+++ b/sysinv/sysinv/sysinv/sysinv/openstack/common/db/exception.py
@@ -28,8 +28,11 @@ class DBError(Exception):
 
 class DBDuplicateEntry(DBError):
     """Wraps an implementation specific exception."""
-    def __init__(self, columns=[], inner_exception=None):
-        self.columns = columns
+    def __init__(self, columns=None, inner_exception=None):
+        if columns is None:
+            self.columns = []
+        else:
+            self.columns = columns
         super(DBDuplicateEntry, self).__init__(inner_exception)
 
 
diff --git a/sysinv/sysinv/sysinv/sysinv/openstack/common/rootwrap/filters.py b/sysinv/sysinv/sysinv/sysinv/openstack/common/rootwrap/filters.py
index 0372c79556..395991b075 100644
--- a/sysinv/sysinv/sysinv/sysinv/openstack/common/rootwrap/filters.py
+++ b/sysinv/sysinv/sysinv/sysinv/openstack/common/rootwrap/filters.py
@@ -29,7 +29,7 @@ class CommandFilter(object):
         self.args = args
         self.real_exec = None
 
-    def get_exec(self, exec_dirs=[]):
+    def get_exec(self, exec_dirs=None):
         """Returns existing executable, or empty string if none found."""
         if self.real_exec is not None:
             return self.real_exec
@@ -37,7 +37,7 @@ class CommandFilter(object):
         if self.exec_path.startswith('/'):
             if os.access(self.exec_path, os.X_OK):
                 self.real_exec = self.exec_path
-        else:
+        elif exec_dirs is not None:
             for binary_path in exec_dirs:
                 expanded_path = os.path.join(binary_path, self.exec_path)
                 if os.access(expanded_path, os.X_OK):
@@ -49,7 +49,7 @@ class CommandFilter(object):
         """Only check that the first argument (command) matches exec_path."""
         return os.path.basename(self.exec_path) == userargs[0]
 
-    def get_command(self, userargs, exec_dirs=[]):
+    def get_command(self, userargs, exec_dirs=None):
         """Returns command to execute (with sudo -u if run_as != root)."""
         to_exec = self.get_exec(exec_dirs=exec_dirs) or self.exec_path
         if (self.run_as != 'root'):
@@ -122,7 +122,9 @@ class PathFilter(CommandFilter):
                 args_equal_or_pass and
                 paths_are_within_base_dirs)
 
-    def get_command(self, userargs, exec_dirs=[]):
+    def get_command(self, userargs, exec_dirs=None):
+        if exec_dirs is None:
+            exec_dirs = []
         command, arguments = userargs[0], userargs[1:]
 
         # convert path values to canonical ones; copy other args as is
@@ -146,7 +148,9 @@ class DnsmasqFilter(CommandFilter):
             return True
         return False
 
-    def get_command(self, userargs, exec_dirs=[]):
+    def get_command(self, userargs, exec_dirs=None):
+        if exec_dirs is None:
+            exec_dirs = []
         to_exec = self.get_exec(exec_dirs=exec_dirs) or self.exec_path
         dnsmasq_pos = userargs.index('dnsmasq')
         return [to_exec] + userargs[dnsmasq_pos + 1:]
diff --git a/sysinv/sysinv/sysinv/sysinv/openstack/common/rootwrap/wrapper.py b/sysinv/sysinv/sysinv/sysinv/openstack/common/rootwrap/wrapper.py
index a32025b24f..df882bdf0a 100644
--- a/sysinv/sysinv/sysinv/sysinv/openstack/common/rootwrap/wrapper.py
+++ b/sysinv/sysinv/sysinv/sysinv/openstack/common/rootwrap/wrapper.py
@@ -121,7 +121,7 @@ def load_filters(filters_path):
     return filterlist
 
 
-def match_filter(filter_list, userargs, exec_dirs=[]):
+def match_filter(filter_list, userargs, exec_dirs=None):
     """
     Checks user command and arguments through command filters and
     returns the first matching filter.
@@ -130,6 +130,8 @@ def match_filter(filter_list, userargs, exec_dirs=[]):
     best filter match.
     """
     first_not_executable_filter = None
+    if exec_dirs is None:
+        exec_dirs = []
 
     for f in filter_list:
         if f.match(userargs):
diff --git a/sysinv/sysinv/sysinv/sysinv/openstack/common/setup.py b/sysinv/sysinv/sysinv/sysinv/openstack/common/setup.py
index 8916bd085e..cc8e90a0a6 100644
--- a/sysinv/sysinv/sysinv/sysinv/openstack/common/setup.py
+++ b/sysinv/sysinv/sysinv/sysinv/openstack/common/setup.py
@@ -68,9 +68,10 @@ def get_reqs_from_files(requirements_files):
     return []
 
 
-def parse_requirements(requirements_files=['requirements.txt',
-                                           'tools/pip-requires']):
+def parse_requirements(requirements_files=None):
     requirements = []
+    if requirements_files is None:
+        requirements_files = ['requirements.txt', 'tools/pip-requires']
     for line in get_reqs_from_files(requirements_files):
         # For the requirements list, we need to inject only the portion
         # after egg= so that distutils knows the package it's looking for
@@ -97,8 +98,9 @@ def parse_requirements(requirements_files=['requirements.txt',
     return requirements
 
 
-def parse_dependency_links(requirements_files=['requirements.txt',
-                                               'tools/pip-requires']):
+def parse_dependency_links(requirements_files=None):
+    if requirements_files is None:
+        requirements_files = ['requirements.txt', 'tools/pip-requires']
     dependency_links = []
     # dependency_links inject alternate locations to find packages listed
     # in requirements