diff --git a/modules/openapi-generator/src/main/resources/python/exceptions.mustache b/modules/openapi-generator/src/main/resources/python/exceptions.mustache
index 8d445c6e248..a60554dc5e7 100644
--- a/modules/openapi-generator/src/main/resources/python/exceptions.mustache
+++ b/modules/openapi-generator/src/main/resources/python/exceptions.mustache
@@ -118,6 +118,30 @@ class ApiException(OpenApiException):
         return error_message
 
 
+class NotFoundException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(NotFoundException, self).__init__(status, reason, http_resp)
+
+
+class UnauthorizedException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(UnauthorizedException, self).__init__(status, reason, http_resp)
+
+
+class ForbiddenException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(ForbiddenException, self).__init__(status, reason, http_resp)
+
+
+class ServiceException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(ServiceException, self).__init__(status, reason, http_resp)
+
+
 def render_path(path_to_item):
     """Returns a string representation of a path"""
     result = ""
diff --git a/modules/openapi-generator/src/main/resources/python/rest.mustache b/modules/openapi-generator/src/main/resources/python/rest.mustache
index 5fb2da0af28..cc8884fb779 100644
--- a/modules/openapi-generator/src/main/resources/python/rest.mustache
+++ b/modules/openapi-generator/src/main/resources/python/rest.mustache
@@ -12,7 +12,7 @@ from urllib.parse import urlencode
 import certifi
 import urllib3
 
-from {{packageName}}.exceptions import ApiException, ApiValueError
+from {{packageName}}.exceptions import ApiException, UnauthorizedException, ForbiddenException, NotFoundException, ServiceException, ApiValueError
 
 
 logger = logging.getLogger(__name__)
@@ -212,6 +212,18 @@ class RESTClientObject(object):
             logger.debug("response body: %s", r.data)
 
         if not 200 <= r.status <= 299:
+            if r.status == 401:
+                raise UnauthorizedException(http_resp=r)
+
+            if r.status == 403:
+                raise ForbiddenException(http_resp=r)
+
+            if r.status == 404:
+                raise NotFoundException(http_resp=r)
+
+            if 500 <= r.status <= 599:
+                raise ServiceException(http_resp=r)
+
             raise ApiException(http_resp=r)
 
         return r
diff --git a/samples/client/petstore/python/petstore_api/exceptions.py b/samples/client/petstore/python/petstore_api/exceptions.py
index fecd2081b81..32affc2df46 100644
--- a/samples/client/petstore/python/petstore_api/exceptions.py
+++ b/samples/client/petstore/python/petstore_api/exceptions.py
@@ -126,6 +126,30 @@ class ApiException(OpenApiException):
         return error_message
 
 
+class NotFoundException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(NotFoundException, self).__init__(status, reason, http_resp)
+
+
+class UnauthorizedException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(UnauthorizedException, self).__init__(status, reason, http_resp)
+
+
+class ForbiddenException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(ForbiddenException, self).__init__(status, reason, http_resp)
+
+
+class ServiceException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(ServiceException, self).__init__(status, reason, http_resp)
+
+
 def render_path(path_to_item):
     """Returns a string representation of a path"""
     result = ""
diff --git a/samples/client/petstore/python/petstore_api/rest.py b/samples/client/petstore/python/petstore_api/rest.py
index 9537cea6b1a..b099044e647 100644
--- a/samples/client/petstore/python/petstore_api/rest.py
+++ b/samples/client/petstore/python/petstore_api/rest.py
@@ -20,7 +20,7 @@ from urllib.parse import urlencode
 import certifi
 import urllib3
 
-from petstore_api.exceptions import ApiException, ApiValueError
+from petstore_api.exceptions import ApiException, UnauthorizedException, ForbiddenException, NotFoundException, ServiceException, ApiValueError
 
 
 logger = logging.getLogger(__name__)
@@ -220,6 +220,18 @@ class RESTClientObject(object):
             logger.debug("response body: %s", r.data)
 
         if not 200 <= r.status <= 299:
+            if r.status == 401:
+                raise UnauthorizedException(http_resp=r)
+
+            if r.status == 403:
+                raise ForbiddenException(http_resp=r)
+
+            if r.status == 404:
+                raise NotFoundException(http_resp=r)
+
+            if 500 <= r.status <= 599:
+                raise ServiceException(http_resp=r)
+
             raise ApiException(http_resp=r)
 
         return r
diff --git a/samples/openapi3/client/extensions/x-auth-id-alias/python/x_auth_id_alias/exceptions.py b/samples/openapi3/client/extensions/x-auth-id-alias/python/x_auth_id_alias/exceptions.py
index 28e4253a0af..dbab17c17c6 100644
--- a/samples/openapi3/client/extensions/x-auth-id-alias/python/x_auth_id_alias/exceptions.py
+++ b/samples/openapi3/client/extensions/x-auth-id-alias/python/x_auth_id_alias/exceptions.py
@@ -126,6 +126,30 @@ class ApiException(OpenApiException):
         return error_message
 
 
+class NotFoundException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(NotFoundException, self).__init__(status, reason, http_resp)
+
+
+class UnauthorizedException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(UnauthorizedException, self).__init__(status, reason, http_resp)
+
+
+class ForbiddenException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(ForbiddenException, self).__init__(status, reason, http_resp)
+
+
+class ServiceException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(ServiceException, self).__init__(status, reason, http_resp)
+
+
 def render_path(path_to_item):
     """Returns a string representation of a path"""
     result = ""
diff --git a/samples/openapi3/client/extensions/x-auth-id-alias/python/x_auth_id_alias/rest.py b/samples/openapi3/client/extensions/x-auth-id-alias/python/x_auth_id_alias/rest.py
index dc890689357..f756a0e3fa4 100644
--- a/samples/openapi3/client/extensions/x-auth-id-alias/python/x_auth_id_alias/rest.py
+++ b/samples/openapi3/client/extensions/x-auth-id-alias/python/x_auth_id_alias/rest.py
@@ -20,7 +20,7 @@ from urllib.parse import urlencode
 import certifi
 import urllib3
 
-from x_auth_id_alias.exceptions import ApiException, ApiValueError
+from x_auth_id_alias.exceptions import ApiException, UnauthorizedException, ForbiddenException, NotFoundException, ServiceException, ApiValueError
 
 
 logger = logging.getLogger(__name__)
@@ -220,6 +220,18 @@ class RESTClientObject(object):
             logger.debug("response body: %s", r.data)
 
         if not 200 <= r.status <= 299:
+            if r.status == 401:
+                raise UnauthorizedException(http_resp=r)
+
+            if r.status == 403:
+                raise ForbiddenException(http_resp=r)
+
+            if r.status == 404:
+                raise NotFoundException(http_resp=r)
+
+            if 500 <= r.status <= 599:
+                raise ServiceException(http_resp=r)
+
             raise ApiException(http_resp=r)
 
         return r
diff --git a/samples/openapi3/client/features/dynamic-servers/python/dynamic_servers/exceptions.py b/samples/openapi3/client/features/dynamic-servers/python/dynamic_servers/exceptions.py
index a463fd10174..51eb4cc396b 100644
--- a/samples/openapi3/client/features/dynamic-servers/python/dynamic_servers/exceptions.py
+++ b/samples/openapi3/client/features/dynamic-servers/python/dynamic_servers/exceptions.py
@@ -126,6 +126,30 @@ class ApiException(OpenApiException):
         return error_message
 
 
+class NotFoundException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(NotFoundException, self).__init__(status, reason, http_resp)
+
+
+class UnauthorizedException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(UnauthorizedException, self).__init__(status, reason, http_resp)
+
+
+class ForbiddenException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(ForbiddenException, self).__init__(status, reason, http_resp)
+
+
+class ServiceException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(ServiceException, self).__init__(status, reason, http_resp)
+
+
 def render_path(path_to_item):
     """Returns a string representation of a path"""
     result = ""
diff --git a/samples/openapi3/client/features/dynamic-servers/python/dynamic_servers/rest.py b/samples/openapi3/client/features/dynamic-servers/python/dynamic_servers/rest.py
index bf61d50d9c1..57bd6c1ea72 100644
--- a/samples/openapi3/client/features/dynamic-servers/python/dynamic_servers/rest.py
+++ b/samples/openapi3/client/features/dynamic-servers/python/dynamic_servers/rest.py
@@ -20,7 +20,7 @@ from urllib.parse import urlencode
 import certifi
 import urllib3
 
-from dynamic_servers.exceptions import ApiException, ApiValueError
+from dynamic_servers.exceptions import ApiException, UnauthorizedException, ForbiddenException, NotFoundException, ServiceException, ApiValueError
 
 
 logger = logging.getLogger(__name__)
@@ -220,6 +220,18 @@ class RESTClientObject(object):
             logger.debug("response body: %s", r.data)
 
         if not 200 <= r.status <= 299:
+            if r.status == 401:
+                raise UnauthorizedException(http_resp=r)
+
+            if r.status == 403:
+                raise ForbiddenException(http_resp=r)
+
+            if r.status == 404:
+                raise NotFoundException(http_resp=r)
+
+            if 500 <= r.status <= 599:
+                raise ServiceException(http_resp=r)
+
             raise ApiException(http_resp=r)
 
         return r
diff --git a/samples/openapi3/client/petstore/python/petstore_api/exceptions.py b/samples/openapi3/client/petstore/python/petstore_api/exceptions.py
index fecd2081b81..32affc2df46 100644
--- a/samples/openapi3/client/petstore/python/petstore_api/exceptions.py
+++ b/samples/openapi3/client/petstore/python/petstore_api/exceptions.py
@@ -126,6 +126,30 @@ class ApiException(OpenApiException):
         return error_message
 
 
+class NotFoundException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(NotFoundException, self).__init__(status, reason, http_resp)
+
+
+class UnauthorizedException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(UnauthorizedException, self).__init__(status, reason, http_resp)
+
+
+class ForbiddenException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(ForbiddenException, self).__init__(status, reason, http_resp)
+
+
+class ServiceException(ApiException):
+
+    def __init__(self, status=None, reason=None, http_resp=None):
+        super(ServiceException, self).__init__(status, reason, http_resp)
+
+
 def render_path(path_to_item):
     """Returns a string representation of a path"""
     result = ""
diff --git a/samples/openapi3/client/petstore/python/petstore_api/rest.py b/samples/openapi3/client/petstore/python/petstore_api/rest.py
index 9537cea6b1a..b099044e647 100644
--- a/samples/openapi3/client/petstore/python/petstore_api/rest.py
+++ b/samples/openapi3/client/petstore/python/petstore_api/rest.py
@@ -20,7 +20,7 @@ from urllib.parse import urlencode
 import certifi
 import urllib3
 
-from petstore_api.exceptions import ApiException, ApiValueError
+from petstore_api.exceptions import ApiException, UnauthorizedException, ForbiddenException, NotFoundException, ServiceException, ApiValueError
 
 
 logger = logging.getLogger(__name__)
@@ -220,6 +220,18 @@ class RESTClientObject(object):
             logger.debug("response body: %s", r.data)
 
         if not 200 <= r.status <= 299:
+            if r.status == 401:
+                raise UnauthorizedException(http_resp=r)
+
+            if r.status == 403:
+                raise ForbiddenException(http_resp=r)
+
+            if r.status == 404:
+                raise NotFoundException(http_resp=r)
+
+            if 500 <= r.status <= 599:
+                raise ServiceException(http_resp=r)
+
             raise ApiException(http_resp=r)
 
         return r