complete implementation of dataset SDK (#2147)

### What problem does this PR solve?

Complete implementation of dataset SDK.
#1102

### Type of change


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

---------

Co-authored-by: Feiue <10215101452@stu.ecun.edu.cn>
Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

sdk/python/test/t_dataset.py

@@ -7,7 +7,7 @@ from test_sdkbase import TestSdk
 class TestDataset(TestSdk):
     def test_create_dataset_with_success(self):
         """
-        Test creating dataset with success
+        Test creating a dataset with success
         """
         rag = RAGFlow(API_KEY, HOST_ADDRESS)
         ds = rag.create_dataset("God")
@@ -18,15 +18,46 @@ class TestDataset(TestSdk):
 
     def test_update_dataset_with_success(self):
         """
-        Test updating dataset  with success.
+        Test updating a dataset with success.
         """
         rag = RAGFlow(API_KEY, HOST_ADDRESS)
         ds = rag.create_dataset("ABC")
         if isinstance(ds, DataSet):
-            assert ds.name == "ABC", "Name  does not match."
+            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}"
-
+            assert res is True, f"Failed to update dataset, error: {res}"
         else:
-            assert False, f"Failed to create dataset, error: {ds}"
+            assert False, f"Failed to create dataset, error: {ds}"
+
+    def test_delete_dataset_with_success(self):
+        """
+        Test deleting a dataset with success
+        """
+        rag = RAGFlow(API_KEY, HOST_ADDRESS)
+        ds = rag.create_dataset("MA")
+        if isinstance(ds, DataSet):
+            assert ds.name == "MA", "Name does not match."
+            res = ds.delete()
+            assert res is True, f"Failed to delete dataset, error: {res}"
+        else:
+            assert False, f"Failed to create dataset, error: {ds}"
+
+    def test_list_datasets_with_success(self):
+        """
+        Test listing datasets with success
+        """
+        rag = RAGFlow(API_KEY, HOST_ADDRESS)
+        list_datasets = rag.list_datasets()
+        assert len(list_datasets) > 0, "Do not exist any dataset"
+        for ds in list_datasets:
+            assert isinstance(ds, DataSet), "Existence type is not dataset."
+
+    def test_get_detail_dataset_with_success(self):
+        """
+        Test getting a dataset's detail with success
+        """
+        rag = RAGFlow(API_KEY, HOST_ADDRESS)
+        ds = rag.get_dataset(name="God")
+        assert isinstance(ds, DataSet), f"Failed to get dataset, error: {ds}."
+        assert ds.name == "God", "Name does not match"