Fix: DataSet.update() now refreshes object data (#8058)

### What problem does this PR solve?

#8057 

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

sdk/python/ragflow_sdk/modules/dataset.py

@@ -14,9 +14,8 @@
 #  limitations under the License.
 #
 
-from .document import Document
-
 from .base import Base
+from .document import Document
 
 
 class DataSet(Base):
@@ -43,12 +42,14 @@ class DataSet(Base):
         super().__init__(rag, res_dict)
 
     def update(self, update_message: dict):
-        res = self.put(f'/datasets/{self.id}',
-                       update_message)
+        res = self.put(f"/datasets/{self.id}", update_message)
         res = res.json()
         if res.get("code") != 0:
             raise Exception(res["message"])
 
+        self._update_from_dict(self.rag, res.get("data", {}))
+        return self
+
     def upload_documents(self, document_list: list[dict]):
         url = f"/datasets/{self.id}/documents"
         files = [("file", (ele["display_name"], ele["blob"])) for ele in document_list]
@@ -62,11 +63,8 @@ class DataSet(Base):
             return doc_list
         raise Exception(res.get("message"))
 
-    def list_documents(self, id: str | None = None, keywords: str | None = None, page: int = 1, page_size: int = 30,
-                       orderby: str = "create_time", desc: bool = True):
-        res = self.get(f"/datasets/{self.id}/documents",
-                       params={"id": id, "keywords": keywords, "page": page, "page_size": page_size, "orderby": orderby,
-                               "desc": desc})
+    def list_documents(self, id: str | None = None, keywords: str | None = None, page: int = 1, page_size: int = 30, orderby: str = "create_time", desc: bool = True):
+        res = self.get(f"/datasets/{self.id}/documents", params={"id": id, "keywords": keywords, "page": page, "page_size": page_size, "orderby": orderby, "desc": desc})
         res = res.json()
         documents = []
         if res.get("code") == 0: