Python3.8 related changes.

Issue-ID: OPTFRA-645
Signed-off-by: Dingari, Sridevi <sridevi.dingari@att.com>
Change-Id: I27dfc3bb9c68657658de95ca1ab491db614d35ab

24 files changed, 98 insertions, 82 deletions

diff --git a/conductor/conductor/api/controllers/v1/plans.py b/conductor/conductor/api/controllers/v1/plans.py
index 8be24d8..9fb7240 100644
--- a/conductor/conductor/api/controllers/v1/plans.py
+++ b/conductor/conductor/api/controllers/v1/plans.py
@@ -349,8 +349,9 @@ def verify_user(authstr):
     user_dict = dict()
     auth_str = authstr
     user_pw = auth_str.split(' ')[1]
+    user_pw = user_pw.encode()   # below function needs user_pw in bytes object in python 3 so converting that
     decode_user_pw = base64.b64decode(user_pw)
-    list_id_pw = decode_user_pw.split(':')
+    list_id_pw = decode_user_pw.decode().split(':')
     user_dict['username'] = str(list_id_pw[0])
     user_dict['password'] = str(list_id_pw[1])
     password = CONF.conductor_api.password
diff --git a/conductor/conductor/api/middleware.py b/conductor/conductor/api/middleware.py
index a04ea30..69b6264 100644
--- a/conductor/conductor/api/middleware.py
+++ b/conductor/conductor/api/middleware.py
@@ -159,7 +159,7 @@ class ParsableErrorMiddleware(object):
                 if six.PY3:
                     app_data = app_data.decode('utf-8')
                 try:
-                    fault = json.loads(app_data)
+                    fault = list(json.loads(app_data))
                     if error is not None and 'faultstring' in fault:
                         fault['faultstring'] = i18n.translate(error,
                                                               user_locale)
diff --git a/conductor/conductor/common/models/group_rules.py b/conductor/conductor/common/models/group_rules.py
index fb7453f..453842c 100644
--- a/conductor/conductor/common/models/group_rules.py
+++ b/conductor/conductor/common/models/group_rules.py
@@ -80,7 +80,7 @@ class GroupRules(base.Base):
         return \
             api.MUSIC_API.row_insert_by_condition(
             self.__keyspace__, self.__tablename__, self.pk_name(),
-            self.pk_value(), self.values(), self.PARKED)
+            self.pk_value(),self.values(), self.PARKED)
 
     def __init__(self, id=None, group=None,rule=None,_insert=False):
         """Initializer"""
diff --git a/conductor/conductor/common/music/api.py b/conductor/conductor/common/music/api.py
index 5929b58..ebde6a3 100644
--- a/conductor/conductor/common/music/api.py
+++ b/conductor/conductor/common/music/api.py
@@ -155,8 +155,8 @@ class MusicAPI(object):
             self.rest.session.headers['ns'] = CONF.music_api.aafns
             self.rest.session.headers['userId'] = CONF.music_api.aafuser
             self.rest.session.headers['password'] = music_pwd
-            self.rest.session.headers['Authorization'] = basic_auth_util.encode(CONF.music_api.aafuser,
-                                                                                CONF.music_api.aafpass)
+            self.rest.session.headers['Authorization'] = str(basic_auth_util.encode(CONF.music_api.aafuser,
+                                                                                CONF.music_api.aafpass))
 
         self.lock_ids = {}
 
@@ -178,7 +178,7 @@ class MusicAPI(object):
     def __del__(self):
         """Deletion."""
         if type(self.lock_ids) is dict:
-            for lock_name in self.lock_ids.keys():
+            for lock_name in list(self.lock_ids.keys()):  # Python 3 Conversion -- dict object to list object
                 self.lock_delete(lock_name)
 
     @staticmethod
@@ -250,7 +250,7 @@ class MusicAPI(object):
         #lock_id = self.lock_ids.get(lock_name)
         data = {
             'consistencyInfo': {
-                'type': 'atomic' if condition else 'eventual',
+                'type': 'atomic',
             }
         }
 
diff --git a/conductor/conductor/common/music/messaging/component.py b/conductor/conductor/common/music/messaging/component.py
index 6ecbe18..d761488 100644
--- a/conductor/conductor/common/music/messaging/component.py
+++ b/conductor/conductor/common/music/messaging/component.py
@@ -300,9 +300,9 @@ class RPCService(cotyledon.Service):
         msgs = self.RPC.query.all()
         for msg in msgs:
             if msg.enqueued:
-                if 'plan_name' in msg.ctxt.keys():
+                if 'plan_name' in list(msg.ctxt.keys()):   # Python 3 Conversion -- dict object to list object
                     LOG.info('Plan name: {}'.format(msg.ctxt['plan_name']))
-                elif 'plan_name' in msg.args.keys():
+                elif 'plan_name' in list(msg.args.keys()):    # Python 3 Conversion -- dict object to list object
                     LOG.info('Plan name: {}'.format(msg.args['plan_name']))
                 msg.delete()
 
@@ -352,9 +352,9 @@ class RPCService(cotyledon.Service):
 
             if not msg.enqueued:
                 continue
-            if 'plan_name' in msg.ctxt.keys():
+            if 'plan_name' in list(msg.ctxt.keys()):   # Python 3 Conversion -- dict object to list object
                 LOG.info('Plan name: {}'.format(msg.ctxt['plan_name']))
-            elif 'plan_name' in msg.args.keys():
+            elif 'plan_name' in list(msg.args.keys()):    # Python 3 Conversion -- dict object to list object
                 LOG.info('Plan name: {}'.format(msg.args['plan_name']))
 
             # Change the status to WORKING (operation with a lock)
@@ -394,7 +394,7 @@ class RPCService(cotyledon.Service):
                 return
 
             # All methods must take a ctxt and args param.
-            if inspect.getargspec(method).args != ['self', 'ctx', 'arg']:
+            if inspect.getfullargspec(method).args != ['self', 'ctx', 'arg']:
                 error_msg = _LE("Method {} must take three args: "
                                 "self, ctx, arg").format(msg.method)
                 self._log_error_and_update_msg(msg, error_msg)
diff --git a/conductor/conductor/common/rest.py b/conductor/conductor/common/rest.py
index 585a628..d5ab8c8 100644
--- a/conductor/conductor/common/rest.py
+++ b/conductor/conductor/common/rest.py
@@ -109,7 +109,7 @@ class REST(object):
         }
         if headers:
             full_headers.update(headers)
-        full_url = '{}/{}'.format(self.server_url, path.lstrip('/'))
+        full_url = '{}/{}'.format(self.server_url, path.lstrip('/').rstrip('/'))
 
         # Prepare the request args
         try:
@@ -162,10 +162,11 @@ class REST(object):
                             json.dumps(response_dict)))
                     except ValueError:
                         LOG.debug("Response Body: {}".format(response.text))
+                #response._content = response._content.decode()
                 if response.ok:
                     break
             except requests.exceptions.RequestException as err:
-                LOG.error("Exception: %s", err.message)
+                LOG.error("Exception: %s", err.args)
 
         # Response.__bool__ returns false if status is not ok. Ruh roh!
         # That means we must check the object type vs treating it as a bool.
diff --git a/conductor/conductor/common/threshold.py b/conductor/conductor/common/threshold.py
index 4ab81fd..0ebbb49 100644
--- a/conductor/conductor/common/threshold.py
+++ b/conductor/conductor/common/threshold.py
@@ -67,7 +67,7 @@ class Threshold(object):
         if base_unit not in self.UNITS:
             raise ThresholdException(
                 "Base unit {} unsupported, must be one of: {}".format(
-                    base_unit, ', '.join(self.UNITS.keys())))
+                    base_unit, ', '.join(list(self.UNITS.keys()))))    # Python 3 Conversion -- dict object to list object
 
         self._expression = expression
         self._base_unit = base_unit
@@ -80,7 +80,7 @@ class Threshold(object):
 
     def _all_units(self):
         """Returns a single list of all supported units"""
-        unit_lists = [self.UNITS[k].keys() for k in self.UNITS.keys()]
+        unit_lists = [list(self.UNITS[k].keys()) for k in list(self.UNITS.keys())]     # Python 3 Conversion -- dict object to list object
         return list(itertools.chain.from_iterable(unit_lists))
 
     def _default_for_base_unit(self, base_unit):
diff --git a/conductor/conductor/common/utils/basic_auth_util.py b/conductor/conductor/common/utils/basic_auth_util.py
index d4cdbac..039384f 100644
--- a/conductor/conductor/common/utils/basic_auth_util.py
+++ b/conductor/conductor/common/utils/basic_auth_util.py
@@ -28,7 +28,11 @@ LOG = log.getLogger(__name__)
 def encode(user_id, password):
     """ Provide the basic authencation encoded value in an 'Authorization' Header """
 
-    user_pass = str(user_id) + ":" + str(password)
+    user_pass = user_id + ":" + password
+                # Here user_pass is str type but in python 3.x version, base64.b64encode is expecting byte
+                # like object so we need to convert the str into bytes
+
+    user_pass = user_pass.encode()     # converting str into bytes form
     base64_val = base64.b64encode(user_pass)
     authorization_val = _LE("Basic {}".format(base64_val))
 
diff --git a/conductor/conductor/common/utils/cipherUtils.py b/conductor/conductor/common/utils/cipherUtils.py
index 6ee6c58..21a33b4 100644
--- a/conductor/conductor/common/utils/cipherUtils.py
+++ b/conductor/conductor/common/utils/cipherUtils.py
@@ -52,7 +52,9 @@ class AESCipher(object):
 
         self.bs = 32
         if key is None:
-            key = CONF.auth.appkey.encode()
+            key = CONF.auth.appkey # ---> python3.8 Code version code
+           # key= CONF.auth.appkey.encode() ---> Python 2.7 version code
+        # in Python 3+ key is already a b'' type so no need to encode it again.
 
         self.key = hashlib.sha256(key.encode()).digest()
 
diff --git a/conductor/conductor/controller/translator.py b/conductor/conductor/controller/translator.py
index 45e0ee2..8184639 100644
--- a/conductor/conductor/controller/translator.py
+++ b/conductor/conductor/controller/translator.py
@@ -225,8 +225,8 @@ class Translator(object):
                             "{} {} has an invalid key {}".format(
                                 name, content_name, key))
 
-        demand_keys = self._demands.keys()
-        location_keys = self._locations.keys()
+        demand_keys = list(self._demands.keys())     # Python 3 Conversion -- dict object to list object
+        location_keys = list(self._locations.keys())     # Python 3 Conversion -- dict object to list object
         for constraint_name, constraint in self._constraints.items():
 
             # Require a single demand (string), or a list of one or more.
@@ -279,7 +279,7 @@ class Translator(object):
         # Traverse a dict
         elif type(obj) is dict:
             # Did we find a "{get_param: ...}" intrinsic?
-            if obj.keys() == ['get_param']:
+            if list(obj.keys()) == ['get_param']:
                 param_name = obj['get_param']
 
                 # The parameter name must be a string.
@@ -300,7 +300,7 @@ class Translator(object):
                 return self._parameters.get(param_name)
 
             # Not an intrinsic. Traverse as usual.
-            for key in obj.keys():
+            for key in list(obj.keys()):
                 # Add path to the breadcrumb trail.
                 new_path = list(path)
                 new_path.append(key)
@@ -393,7 +393,7 @@ class Translator(object):
                                 "not a dictionary".format(name))
 
                         # Must have only supported keys
-                        for key in candidate.keys():
+                        for key in list(candidate.keys()):
                             if key not in CANDIDATE_KEYS:
                                 raise TranslatorException(
                                     "Candidate with invalid key {} found "
@@ -657,7 +657,7 @@ class Translator(object):
                     # Make sure all required properties are present
                     required = constraint_def.get('required', [])
                     for req_prop in required:
-                        if req_prop not in value.keys():
+                        if req_prop not in list(value.keys()):
                             raise TranslatorException(
                                 "Required property '{}' not found in "
                                 "constraint named '{}'".format(
@@ -674,7 +674,7 @@ class Translator(object):
 
                     # Make sure there are no unknown properties
                     optional = constraint_def.get('optional', [])
-                    for prop_name in value.keys():
+                    for prop_name in list(value.keys()):
                         if prop_name not in required + optional:
                             raise TranslatorException(
                                 "Unknown property '{}' in "
@@ -685,7 +685,7 @@ class Translator(object):
                     # sure its value is one of the allowed ones.
                     allowed = constraint_def.get('allowed', {})
                     for prop_name, allowed_values in allowed.items():
-                        if prop_name in value.keys():
+                        if prop_name in list(value.keys()):
                             prop_value = value.get(prop_name, '')
                             if prop_value not in allowed_values:
                                 raise TranslatorException(
@@ -697,7 +697,7 @@ class Translator(object):
                     # Break all threshold-formatted values into parts
                     thresholds = constraint_def.get('thresholds', {})
                     for thr_prop, base_units in thresholds.items():
-                        if thr_prop in value.keys():
+                        if thr_prop in list(value.keys()):
                             expression = value.get(thr_prop)
                             thr = threshold.Threshold(expression, base_units)
                             value[thr_prop] = thr.parts
@@ -751,12 +751,12 @@ class Translator(object):
         if type(optimization_copy) is not dict:
             raise TranslatorException("Optimization must be a dictionary.")
 
-        goals = optimization_copy.keys()
+        goals = list(optimization_copy.keys())
         if goals != ['minimize']:
             raise TranslatorException(
                 "Optimization must contain a single goal of 'minimize'.")
 
-        funcs = optimization_copy['minimize'].keys()
+        funcs = list(optimization_copy['minimize'].keys())
         if funcs != ['sum']:
             raise TranslatorException(
                 "Optimization goal 'minimize' must "
@@ -779,9 +779,9 @@ class Translator(object):
             got_demand = False
             got_location = False
             for arg in args:
-                if not got_demand and arg in self._demands.keys():
+                if not got_demand and arg in list(self._demands.keys()):
                     got_demand = True
-                if not got_location and arg in self._locations.keys():
+                if not got_location and arg in list(self._locations.keys()):
                     got_location = True
             if not got_demand or not got_location:
                 raise TranslatorException(
@@ -801,9 +801,9 @@ class Translator(object):
             got_demand = False
             got_location = False
             for arg in args:
-                if not got_demand and arg in self._demands.keys():
+                if not got_demand and arg in list(self._demands.keys()):
                     got_demand = True
-                if not got_location and arg in self._locations.keys():
+                if not got_location and arg in list(self._locations.keys()):
                     got_location = True
             if not got_demand or not got_location:
                 raise TranslatorException(
@@ -818,47 +818,47 @@ class Translator(object):
             args = None
             nested = False
 
-            if operand.keys() == ['distance_between']:
+            if list(operand.keys()) == ['distance_between']:
                 # Value must be a list of length 2 with one
                 # location and one demand
                 function = 'distance_between'
                 args = get_distance_between_args(operand)
 
-            elif operand.keys() == ['product']:
+            elif list(operand.keys()) == ['product']:
                 for product_op in operand['product']:
                     if threshold.is_number(product_op):
                         weight = product_op
                     elif isinstance(product_op, dict):
-                        if product_op.keys() == ['latency_between']:
+                        if list(product_op.keys()) == ['latency_between']:
                             function = 'latency_between'
                             args = get_latency_between_args(product_op)
-                        elif product_op.keys() == ['distance_between']:
+                        elif list(product_op.keys()) == ['distance_between']:
                             function = 'distance_between'
                             args = get_distance_between_args(product_op)
-                        elif product_op.keys() == ['aic_version']:
+                        elif list(product_op.keys()) == ['aic_version']:
                             function = 'aic_version'
                             args = product_op.get('aic_version')
-                        elif product_op.keys() == ['hpa_score']:
+                        elif list(product_op.keys()) == ['hpa_score']:
                             function = 'hpa_score'
                             args = product_op.get('hpa_score')
                             if not self.is_hpa_policy_exists(args):
                                 raise TranslatorException(
                                     "HPA Score Optimization must include a "
                                     "HPA Policy constraint ")
-                        elif product_op.keys() == ['sum']:
+                        elif list(product_op.keys()) == ['sum']:
                             nested = True
                             nested_operands = product_op.get('sum')
                             for nested_operand in nested_operands:
-                                if nested_operand.keys() == ['product']:
+                                if list(nested_operand.keys()) == ['product']:
                                     nested_weight = weight
                                     for nested_product_op in nested_operand['product']:
                                         if threshold.is_number(nested_product_op):
                                             nested_weight = nested_weight * int(nested_product_op)
                                         elif isinstance(nested_product_op, dict):
-                                            if nested_product_op.keys() == ['latency_between']:
+                                            if list(nested_product_op.keys()) == ['latency_between']:
                                                 function = 'latency_between'
                                                 args = get_latency_between_args(nested_product_op)
-                                            elif nested_product_op.keys() == ['distance_between']:
+                                            elif list(nested_product_op.keys()) == ['distance_between']:
                                                 function = 'distance_between'
                                                 args = get_distance_between_args(nested_product_op)
                                     parsed['operands'].append(
@@ -920,7 +920,7 @@ class Translator(object):
                     if not reservation_details.get('properties'):
                         reservation_details['properties'] = {}
                     for demand in reservation_details.get('demands', []):
-                        if demand in demands.keys():
+                        if demand in list(demands.keys()):
                             reservation_demand = name + '_' + demand
                             parsed['demands'][reservation_demand] = copy.deepcopy(reservation_details)
                             parsed['demands'][reservation_demand]['name'] = name
@@ -963,7 +963,7 @@ class Translator(object):
             self.do_translation()
             self._ok = True
         except Exception as exc:
-            self._error_message = exc.message
+            self._error_message = exc.args
 
     @property
     def valid(self):
diff --git a/conductor/conductor/data/plugins/inventory_provider/aai.py b/conductor/conductor/data/plugins/inventory_provider/aai.py
index f49d526..cf764e5 100644
--- a/conductor/conductor/data/plugins/inventory_provider/aai.py
+++ b/conductor/conductor/data/plugins/inventory_provider/aai.py
@@ -290,7 +290,7 @@ class AAI(base.InventoryProviderBase):
                     keys = ('latitude', 'longitude', 'city', 'country',
                             'complex_name')
                     missing_keys = \
-                        list(set(keys).difference(complex_info.keys()))
+                        list(set(keys).difference(list(complex_info.keys())))   # Python 3 Conversion -- dict object to list object
                     LOG.error(_LE("Complex {} is missing {}, link: {}").
                               format(complex_id, missing_keys, complex_link))
                     LOG.debug("Complex {}: {}".
@@ -418,7 +418,7 @@ class AAI(base.InventoryProviderBase):
                 if not (latitude and longitude and city and country):
                     keys = ('latitude', 'longitude', 'city', 'country')
                     missing_keys = \
-                        list(set(keys).difference(complex_info.keys()))
+                        list(set(keys).difference(set(complex_info.keys())))
                     LOG.error(_LE("Complex {} is missing {}, link: {}").
                               format(complex_id, missing_keys, complex_link))
                     LOG.debug("Complex {}: {}".
diff --git a/conductor/conductor/data/plugins/triage_translator/triage_translator.py b/conductor/conductor/data/plugins/triage_translator/triage_translator.py
index f660ad5..697c64a 100644
--- a/conductor/conductor/data/plugins/triage_translator/triage_translator.py
+++ b/conductor/conductor/data/plugins/triage_translator/triage_translator.py
@@ -23,7 +23,11 @@ import json
 from conductor.common.models.triage_tool import TriageTool
 from conductor.common.music.model import base
 from oslo_config import cfg
-from StringIO import StringIO
+try:
+    from StringIO import StringIO ## for Python 2
+except ImportError:
+    from io import StringIO ## for Python 3
+
 
 CONF = cfg.CONF
 io = StringIO()
@@ -36,7 +40,7 @@ class TraigeTranslator(object):
         triage_translator_data['plan_name'] = plan_name
         triage_translator_data['plan_id'] = plan_id
     def addDemandsTriageTranslator(self, name, triage_translator_data):
-        if not 'dropped_candidates' in triage_translator_data.keys():
+        if not 'dropped_candidates' in list(triage_translator_data.keys()):   # Python 3 Conversion -- dict object to list object
             triage_translator_data['dropped_candidates'] = []
             dropped_candidate_details = {}
             dropped_candidate_details['name'] = name
@@ -45,7 +49,7 @@ class TraigeTranslator(object):
             triage_translator_data['dropped_candidates'].append(dropped_candidate_details)
         else:
             for dc in triage_translator_data['dropped_candidates']:
-                print name
+                print(name)   # Python 3 conversion as print statement changed from python 2
                 if not dc['name'] == name:
                     dropped_candidate_details = {}
                     dropped_candidate_details['name'] = name
diff --git a/conductor/conductor/data/service.py b/conductor/conductor/data/service.py
index 0b66b22..ab1a331 100644
--- a/conductor/conductor/data/service.py
+++ b/conductor/conductor/data/service.py
@@ -664,6 +664,7 @@ class DataEndpoint(object):
         host_name = arg.get('host_name')
         clli_code = arg.get('clli_code')
 
+
         if host_name:
             results = self.ip_ext_manager.map_method(
                 'resolve_host_location',
diff --git a/conductor/conductor/reservation/service.py b/conductor/conductor/reservation/service.py
index 01a7453..6a990f5 100644
--- a/conductor/conductor/reservation/service.py
+++ b/conductor/conductor/reservation/service.py
@@ -400,7 +400,7 @@ class ReservationService(cotyledon.Service):
                             # order_lock spin-up rollback
                             for decision in solution.get('recommendations'):
 
-                                candidate = decision.values()[0].get('candidate')
+                                candidate = list(decision.values())[0].get('candidate')   # Python 3 Conversion -- dict object to list object
                                 if candidate.get('inventory_type') == 'cloud':
                                     # TODO(larry) change the code to get('conflict_id') instead of 'location_id'
                                     conflict_id = candidate.get('conflict_id')
@@ -452,7 +452,7 @@ class ReservationService(cotyledon.Service):
                         # order_lock spin-up rollback
                         for decision in solution.get('recommendations'):
 
-                            candidate = decision.values()[0].get('candidate')
+                            candidate = list(decision.values())[0].get('candidate')   # Python 3 Conversion -- dict object to list object
                             if candidate.get('inventory_type') == 'cloud':
                                 conflict_id = candidate.get('conflict_id')
                                 order_record = self.OrderLock.query.get_plan_by_col("id", conflict_id)[0]
diff --git a/conductor/conductor/solver/optimizer/best_first.py b/conductor/conductor/solver/optimizer/best_first.py
index 3b579c6..2ac6387 100755
--- a/conductor/conductor/solver/optimizer/best_first.py
+++ b/conductor/conductor/solver/optimizer/best_first.py
@@ -88,7 +88,7 @@ class BestFirst(search.Search):
 
                     # check closeness for this decision
                     np.set_decision_id(p, candidate.name)
-                    if np.decision_id in close_paths.keys():
+                    if np.decision_id in list(close_paths.keys()):    # Python 3 Conversion -- dict object to list object
                         valid_candidate = False
 
                     ''' for base comparison heuristic '''
@@ -112,7 +112,7 @@ class BestFirst(search.Search):
 
     def _get_new_demand(self, _p, _demand_list):
         for demand in _demand_list:
-            if demand.name not in _p.decisions.keys():
+            if demand.name not in list(_p.decisions.keys()):     # Python 3 Conversion -- dict object to list object
                 return demand
 
         return None
diff --git a/conductor/conductor/solver/optimizer/constraints/inventory_group.py b/conductor/conductor/solver/optimizer/constraints/inventory_group.py
index f0f8089..a0d1095 100755
--- a/conductor/conductor/solver/optimizer/constraints/inventory_group.py
+++ b/conductor/conductor/solver/optimizer/constraints/inventory_group.py
@@ -21,7 +21,7 @@
 
 from oslo_log import log
 
-from constraint import Constraint
+from .constraint import Constraint    # Python 3 import statement relative imports
 
 LOG = log.getLogger(__name__)
 
diff --git a/conductor/conductor/solver/optimizer/constraints/zone.py b/conductor/conductor/solver/optimizer/constraints/zone.py
index c95b085..ef9889c 100755
--- a/conductor/conductor/solver/optimizer/constraints/zone.py
+++ b/conductor/conductor/solver/optimizer/constraints/zone.py
@@ -22,7 +22,7 @@
 import operator
 from oslo_log import log
 
-from constraint import Constraint
+from .constraint import Constraint # Python 3 import statement relative imports
 
 LOG = log.getLogger(__name__)
 
diff --git a/conductor/conductor/solver/optimizer/optimizer.py b/conductor/conductor/solver/optimizer/optimizer.py
index 7909c15..97e0c88 100755
--- a/conductor/conductor/solver/optimizer/optimizer.py
+++ b/conductor/conductor/solver/optimizer/optimizer.py
@@ -239,7 +239,7 @@ class Optimizer(object):
                 if op.function.func_type == "latency_between":  #TODO
                     if op.function.loc_a.name == d.name:
                         if op.function.loc_z.name in \
-                                _request.demands.keys():
+                                list(_request.demands.keys()):    # Python 3 Conversion -- dict object to list object
                             if _request.demands[
                                     op.function.loc_z.name].sort_base != 1:
                                 _request.demands[
@@ -247,7 +247,7 @@ class Optimizer(object):
                                 _open_demand_list.append(op.function.loc_z)
                     elif op.function.loc_z.name == d.name:
                         if op.function.loc_a.name in \
-                                _request.demands.keys():
+                                list(_request.demands.keys()):    # Python 3 Conversion -- dict object to list object
                             if _request.demands[
                                     op.function.loc_a.name].sort_base != 1:
                                 _request.demands[
@@ -257,7 +257,7 @@ class Optimizer(object):
                 elif op.function.func_type == "distance_between":
                     if op.function.loc_a.name == d.name:
                         if op.function.loc_z.name in \
-                                _request.demands.keys():
+                                list(_request.demands.keys()):    # Python 3 Conversion -- dict object to list object
                             if _request.demands[
                                     op.function.loc_z.name].sort_base != 1:
                                 _request.demands[
@@ -265,7 +265,7 @@ class Optimizer(object):
                                 _open_demand_list.append(op.function.loc_z)
                     elif op.function.loc_z.name == d.name:
                         if op.function.loc_a.name in \
-                                _request.demands.keys():
+                                list(_request.demands.keys()):    # Python 3 Conversion -- dict object to list object
                             if _request.demands[
                                     op.function.loc_a.name].sort_base != 1:
                                 _request.demands[
diff --git a/conductor/conductor/solver/request/objective.py b/conductor/conductor/solver/request/objective.py
index 526a889..70882ec 100755
--- a/conductor/conductor/solver/request/objective.py
+++ b/conductor/conductor/solver/request/objective.py
@@ -55,7 +55,7 @@ class Operand(object):
         if self.function.func_type == "latency_between":
             if isinstance(self.function.loc_a, demand.Location):
                 if self.function.loc_z.name in \
-                        _decision_path.decisions.keys():
+                        list(_decision_path.decisions.keys()):    # Python 3 Conversion -- dict object to list object
                     resource = \
                         _decision_path.decisions[self.function.loc_z.name]
                     candidate_cost = resource.get('cost')
@@ -70,7 +70,7 @@ class Operand(object):
                         + candidate_cost
             elif isinstance(self.function.loc_z, demand.Location):
                 if self.function.loc_a.name in \
-                        _decision_path.decisions.keys():
+                        list(_decision_path.decisions.keys()):    # Python 3 Conversion -- dict object to list object
                     resource = \
                         _decision_path.decisions[self.function.loc_a.name]
                     candidate_cost = resource.get('cost')
@@ -85,9 +85,9 @@ class Operand(object):
                         + candidate_cost
             else:
                 if self.function.loc_a.name in \
-                        _decision_path.decisions.keys() and \
+                        list(_decision_path.decisions.keys()) and \
                    self.function.loc_z.name in \
-                        _decision_path.decisions.keys():
+                        list(_decision_path.decisions.keys()):  # Python 3 Conversion -- dict object to list object
                     resource_a = \
                         _decision_path.decisions[self.function.loc_a.name]
                     loc_a = None
@@ -122,7 +122,7 @@ class Operand(object):
         elif self.function.func_type == "distance_between":
             if isinstance(self.function.loc_a, demand.Location):
                 if self.function.loc_z.name in \
-                        _decision_path.decisions.keys():
+                        list(_decision_path.decisions.keys()):   # Python 3 Conversion -- dict object to list object
                     resource = \
                         _decision_path.decisions[self.function.loc_z.name]
                     candidate_cost = resource.get('cost')
@@ -137,7 +137,7 @@ class Operand(object):
                         + candidate_cost
             elif isinstance(self.function.loc_z, demand.Location):
                 if self.function.loc_a.name in \
-                        _decision_path.decisions.keys():
+                        list(_decision_path.decisions.keys()):    # Python 3 Conversion -- dict object to list object
                     resource = \
                         _decision_path.decisions[self.function.loc_a.name]
                     candidate_cost = resource.get('cost')
@@ -152,9 +152,9 @@ class Operand(object):
                         + candidate_cost
             else:
                 if self.function.loc_a.name in \
-                        _decision_path.decisions.keys() and \
+                        list(_decision_path.decisions.keys()) and \
                    self.function.loc_z.name in \
-                        _decision_path.decisions.keys():
+                        list(_decision_path.decisions.keys()):    # Python 3 Conversion -- dict object to list object
                     resource_a = \
                         _decision_path.decisions[self.function.loc_a.name]
                     loc_a = None
diff --git a/conductor/conductor/solver/request/parser.py b/conductor/conductor/solver/request/parser.py
index 0b3fb76..0ce3290 100755
--- a/conductor/conductor/solver/request/parser.py
+++ b/conductor/conductor/solver/request/parser.py
@@ -331,7 +331,7 @@ class Parser(object):
             candidate_countries = ''
             for demand_id, demands in self.demands.items():
                 candidate_countries += demand_id
-                for candidte in demands.resources.values():
+                for candidte in list(demands.resources.values()):   # Python 3 Conversion -- dict object to list object
                     candidate_country_list.append(candidte["country"])
                     candidate_countries += candidte["country"]
                     candidate_countries += ','
@@ -401,7 +401,7 @@ class Parser(object):
 
         for demand_id, demands in self.demands.items():
             LOG.info("demand id " + demand_id)
-            for candidte in demands.resources.values():
+            for candidte in list(demands.resources.values()):    # Python 3 Conversion -- dict object to list object
                 LOG.info("candidate id " + candidte['candidate_id'])
                 dem_candidate = {demand_id: demands}
                 temp_candidates.update(dem_candidate)
@@ -409,7 +409,7 @@ class Parser(object):
         droped_candidates = ''
         for demand_id, demands in temp_candidates.items():
             droped_candidates += demand_id
-            for candidate in demands.resources.values():
+            for candidate in list(demands.resources.values()):   # Python 3 Conversion -- dict object to list object
                 if demand_id in self.obj_func_param and candidate["country"] in diff_bw_candidates_and_countries:
                     droped_candidates += candidate['candidate_id']
                     droped_candidates += ','
@@ -541,6 +541,6 @@ class Parser(object):
         self.reorder_constraint()
         for constraint_name, constraint in self.constraints.items():
             for d in constraint.demand_list:
-                if d in self.demands.keys():
+                if d in list(self.demands.keys()):     # Python 3 Conversion -- dict object to list object
                     self.demands[d].constraint_list.append(constraint)
         self.sort_constraint_by_rank()
diff --git a/conductor/conductor/solver/service.py b/conductor/conductor/solver/service.py
index fb7b2f0..2ed0c4a 100644
--- a/conductor/conductor/solver/service.py
+++ b/conductor/conductor/solver/service.py
@@ -420,7 +420,7 @@ class SolverService(cotyledon.Service):
 
             except Exception as err:
                 message = _LE("Plan {} status encountered a "
-                              "parsing error: {}").format(p.id, err.message)
+                              "parsing error: {}").format(p.id, err)
                 LOG.error(traceback.print_exc())
                 p.status = self.Plan.ERROR
                 p.message = message
@@ -766,7 +766,7 @@ class SolverService(cotyledon.Service):
         :param flavor_map: flavor map get
         :param directives: All the directives get from request
         '''
-        keys = flavor_map.keys()
+        keys = list(flavor_map.keys())     # Python 3 Conversion -- dict object to list object
         for ele in directives.get("directives"):
             for item in ele.get("directives"):
                 if "flavor_directives" in item.get("type"):
diff --git a/conductor/conductor/solver/triage_tool/traige_latency.py b/conductor/conductor/solver/triage_tool/traige_latency.py
index 3a7fb0c..a93f558 100644
--- a/conductor/conductor/solver/triage_tool/traige_latency.py
+++ b/conductor/conductor/solver/triage_tool/traige_latency.py
@@ -24,7 +24,10 @@ import unicodedata
 from conductor.common.models.triage_tool import TriageTool
 from conductor.common.music.model import base
 from oslo_config import cfg
-from StringIO import StringIO
+try:
+    from StringIO import StringIO ## for Python 2
+except ImportError:
+    from io import StringIO ## for Python 3
 
 CONF = cfg.CONF
 io = StringIO()
diff --git a/conductor/conductor/solver/triage_tool/triage_data.py b/conductor/conductor/solver/triage_tool/triage_data.py
index 007efcb..03a29bf 100644
--- a/conductor/conductor/solver/triage_tool/triage_data.py
+++ b/conductor/conductor/solver/triage_tool/triage_data.py
@@ -98,7 +98,7 @@ class TriageData(object):
                     ca['type'] ='dropped'
                     for cca in ca['constraints']:
                         for dl in dc['constraints']:
-                            if 'constraint_name_dropped' in dl.keys():
+                            if 'constraint_name_dropped' in list(dl.keys()):    # Python 3 Conversion -- dict object to list object
                                 if(cca['name'] == dl['constraint_name_dropped']):
                                     dc['status'] = "dropped"
         return self.triage
@@ -108,7 +108,7 @@ class TriageData(object):
             count = self.sorted_demand.index(demanHadNoCandidate.name)
             count = count-1
             if count == 0:
-                decision_rolba = decisionWeneedtoRollback.decisions.values()
+                decision_rolba = list(decisionWeneedtoRollback.decisions.values())   # Python 3 Conversion -- dict object to list object
                 for x in decision_rolba:
                     for canrb in self.triage['candidates']:
                         if x['node_id'] == canrb['node_id'] :
@@ -145,10 +145,10 @@ class TriageData(object):
             counter = 0
             d1 = []; d2 = []; d3 = []; d4 = []; d5 = []; d6 = []
             for fc in decision_list:
-                for final_cand in fc.values():
+                for final_cand in list(fc.values()):   # Python 3 Conversion -- dict object to list object
                     for final_resou in self.triage['candidates']:
                         if final_cand['node_id'] == final_resou['node_id']:
-                            if 'type' in final_resou.keys() :
+                            if 'type' in list(final_resou.keys()) :    # Python 3 Conversion -- dict object to list object
                                 if not final_resou['type'] == "dropped":
                                     final_resou['type'] = 'solution'
                                     final_resou['children'] = []
@@ -156,7 +156,7 @@ class TriageData(object):
                                 final_resou['type'] = 'solution'
                                 final_resou['children'] = []
 
-                        elif not 'type' in final_resou.keys():
+                        elif not 'type' in list(final_resou.keys()):    # Python 3 Conversion -- dict object to list object
                             final_resou['type'] = 'not tried'
             #
             for cand in self.triage['candidates']:
diff --git a/pom.xml b/pom.xml
index 69bc49f..c64b5cd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -21,7 +21,7 @@
     <parent>
         <groupId>org.onap.oparent</groupId>
         <artifactId>oparent-python</artifactId>
-        <version>3.0.0-SNAPSHOT</version>
+        <version>3.0.0</version>
     </parent>
 
     <groupId>org.onap.optf.has</groupId>
@@ -59,7 +59,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-deploy-plugin</artifactId>
-                <version>2.7</version>
+                <version>3.8</version>
                 <configuration>
                     <retryFailedDeploymentCount>2</retryFailedDeploymentCount>
                 </configuration>