diff --git a/python/knext/knext/graph/client.py b/python/knext/knext/graph/client.py
index 00c42b26..08ba7fbc 100644
--- a/python/knext/knext/graph/client.py
+++ b/python/knext/knext/graph/client.py
@@ -99,4 +99,4 @@ if __name__ == "__main__":
         "Entity", [{"name": "Anxiety_and_nervousness", "type": "Entity"}]
     )
     for o in out:
-        print(o)
\ No newline at end of file
+        print(o)
diff --git a/python/knext/knext/search/rest/models/text_search_request.py b/python/knext/knext/search/rest/models/text_search_request.py
index deb0ac00..046301ee 100644
--- a/python/knext/knext/search/rest/models/text_search_request.py
+++ b/python/knext/knext/search/rest/models/text_search_request.py
@@ -81,9 +81,11 @@ class TextSearchRequest(object):
 
         self.project_id = project_id
         self.query_string = query_string
-        self.label_constraints = label_constraints
+        if label_constraints is not None:
+            self.label_constraints = label_constraints
         self.topk = topk
-        self.params = params
+        if params is not None:
+            self.params = params
 
     @property
     def project_id(self):
@@ -158,13 +160,6 @@ class TextSearchRequest(object):
         :param label_constraints: The label_constraints of this TextSearchRequest.  # noqa: E501
         :type: list[str]
         """
-        if (
-            self.local_vars_configuration.client_side_validation
-            and label_constraints is None
-        ):  # noqa: E501
-            raise ValueError(
-                "Invalid value for `label_constraints`, must not be `None`"
-            )  # noqa: E501
 
         self._label_constraints = label_constraints
 
@@ -213,12 +208,6 @@ class TextSearchRequest(object):
         :param params: The params of this TextSearchRequest.  # noqa: E501
         :type: object
         """
-        if (
-            self.local_vars_configuration.client_side_validation and params is None
-        ):  # noqa: E501
-            raise ValueError(
-                "Invalid value for `params`, must not be `None`"
-            )  # noqa: E501
 
         self._params = params
 
diff --git a/python/knext/knext/search/rest/models/vector_search_request.py b/python/knext/knext/search/rest/models/vector_search_request.py
index 6e67e045..9475adba 100644
--- a/python/knext/knext/search/rest/models/vector_search_request.py
+++ b/python/knext/knext/search/rest/models/vector_search_request.py
@@ -94,7 +94,8 @@ class VectorSearchRequest(object):
         if ef_search is not None:
             self.ef_search = ef_search
         self.topk = topk
-        self.params = params
+        if params is not None:
+            self.params = params
 
     @property
     def project_id(self):
@@ -272,12 +273,6 @@ class VectorSearchRequest(object):
         :param params: The params of this VectorSearchRequest.  # noqa: E501
         :type: object
         """
-        if (
-            self.local_vars_configuration.client_side_validation and params is None
-        ):  # noqa: E501
-            raise ValueError(
-                "Invalid value for `params`, must not be `None`"
-            )  # noqa: E501
 
         self._params = params