diff --git a/examples/example_bulkwriter.py b/examples/example_bulkwriter.py
index 1b41223e7..d1d20b66e 100644
--- a/examples/example_bulkwriter.py
+++ b/examples/example_bulkwriter.py
@@ -295,7 +295,9 @@ def test_retrieve_imported_data(bin_vec: bool):
 
 def test_cloud_bulkinsert():
     url = "https://_your_cloud_server_url_"
+    api_key = "_api_key_for_the_url_"
     cluster_id = "_your_cloud_instance_id_"
+    collection_name = "_collection_name_on_the_cloud_"
 
     print(f"\n===================== import files to cloud vectordb ====================")
     object_url = "_your_object_storage_service_url_"
@@ -303,31 +305,34 @@ def test_cloud_bulkinsert():
     object_url_secret_key = "_your_object_storage_service_secret_key_"
     resp = bulk_import(
         url=url,
+        api_key=api_key,
         object_url=object_url,
         access_key=object_url_access_key,
         secret_key=object_url_secret_key,
         cluster_id=cluster_id,
-        collection_name=CSV_COLLECTION_NAME,
+        collection_name=collection_name,
     )
-    print(resp)
+    print(resp.json())
 
     print(f"\n===================== get import job progress ====================")
-    job_id = resp['data']['jobId']
+    job_id = resp.json()['data']['jobId']
     resp = get_import_progress(
         url=url,
+        api_key=api_key,
         job_id=job_id,
         cluster_id=cluster_id,
     )
-    print(resp)
+    print(resp.json())
 
     print(f"\n===================== list import jobs ====================")
     resp = list_import_jobs(
         url=url,
+        api_key=api_key,
         cluster_id=cluster_id,
         page_size=10,
         current_page=1,
     )
-    print(resp)
+    print(resp.json())
 
 
 if __name__ == '__main__':
@@ -351,5 +356,6 @@ def test_cloud_bulkinsert():
     test_call_bulkinsert(schema, batch_files)
     test_retrieve_imported_data(bin_vec=True)
 
+    # to test cloud bulkinsert api, you need to apply a cloud service from Zilliz Cloud(https://zilliz.com/cloud)
     # test_cloud_bulkinsert()
 
diff --git a/pymilvus/bulk_writer/bulk_import.py b/pymilvus/bulk_writer/bulk_import.py
index 736fbf76c..a5ce9e54c 100644
--- a/pymilvus/bulk_writer/bulk_import.py
+++ b/pymilvus/bulk_writer/bulk_import.py
@@ -44,7 +44,9 @@ def _handle_response(url: str, res: json):
         _throw(f"Failed to request url: {url}, code: {inner_code}, message: {inner_message}")
 
 
-def _post_request(url: str, api_key: str, params: {}, timeout: int = 20, **kwargs):
+def _post_request(
+    url: str, api_key: str, params: {}, timeout: int = 20, **kwargs
+) -> requests.Response:
     try:
         resp = requests.post(
             url=url, headers=_http_headers(api_key), json=params, timeout=timeout, **kwargs
@@ -57,7 +59,9 @@ def _post_request(url: str, api_key: str, params: {}, timeout: int = 20, **kwarg
         _throw(f"Failed to post url: {url}, error: {err}")
 
 
-def _get_request(url: str, api_key: str, params: {}, timeout: int = 20, **kwargs):
+def _get_request(
+    url: str, api_key: str, params: {}, timeout: int = 20, **kwargs
+) -> requests.Response:
     try:
         resp = requests.get(
             url=url, headers=_http_headers(api_key), params=params, timeout=timeout, **kwargs
@@ -80,7 +84,7 @@ def bulk_import(
     cluster_id: str,
     collection_name: str,
     **kwargs,
-):
+) -> requests.Response:
     """call bulkinsert restful interface to import files
 
     Args:
@@ -108,7 +112,9 @@ def bulk_import(
     return resp
 
 
-def get_import_progress(url: str, api_key: str, job_id: str, cluster_id: str, **kwargs):
+def get_import_progress(
+    url: str, api_key: str, job_id: str, cluster_id: str, **kwargs
+) -> requests.Response:
     """get job progress
 
     Args:
@@ -132,7 +138,7 @@ def get_import_progress(url: str, api_key: str, job_id: str, cluster_id: str, **
 
 def list_import_jobs(
     url: str, api_key: str, cluster_id: str, page_size: int, current_page: int, **kwargs
-):
+) -> requests.Response:
     """list jobs in a cluster
 
     Args: