create and update dataset (#2110)

### What problem does this PR solve?

Added the ability to create and update dataset for SDK

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

---------

Co-authored-by: root <root@xwg>
Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

sdk/python/test/t_dataset.py

@@ -1,4 +1,4 @@
-from ragflow import RAGFlow
+from ragflow import RAGFlow, DataSet
 
 from common import API_KEY, HOST_ADDRESS
 from test_sdkbase import TestSdk
@@ -6,18 +6,27 @@ from test_sdkbase import TestSdk
 
 class TestDataset(TestSdk):
     def test_create_dataset_with_success(self):
+        """
+        Test creating dataset with success
+        """
         rag = RAGFlow(API_KEY, HOST_ADDRESS)
         ds = rag.create_dataset("God")
-        assert ds is not None, "The dataset creation failed, returned None."
-        assert ds.name == "God", "Dataset name does not match."
+        if isinstance(ds, DataSet):
+            assert ds.name == "God", "Name does not match."
+        else:
+            assert False, f"Failed to create dataset, error: {ds}"
 
-    def test_delete_one_file(self):
+    def test_update_dataset_with_success(self):
         """
-        Test deleting one file with success.
+        Test updating dataset  with success.
         """
         rag = RAGFlow(API_KEY, HOST_ADDRESS)
         ds = rag.create_dataset("ABC")
-        assert ds is not None, "Failed to create dataset"
-        assert ds.name == "ABC", "Dataset name mismatch"
-        delete_result = ds.delete()
-        assert delete_result is True, "Failed to delete dataset"
+        if isinstance(ds, DataSet):
+            assert ds.name == "ABC", "Name  does not match."
+            ds.name = 'DEF'
+            res = ds.save()
+            assert res is True, f"Failed to update dataset,  error: {res}"
+
+        else:
+            assert False, f"Failed to create dataset, error: {ds}"