fix bug

Former-commit-id: 53fa5d480d001cc82145710fa0329604b85bab19

cpp/src/thrift/gen-py/py_sample.py

 import time
 import struct
 
-from test_proj_env.zilliz import VecService
+from zilliz import VecService
 
 from thrift import Thrift
 from thrift.transport import TSocket

cpp/test_client/src/ClientTest.cpp

@@ -188,6 +188,7 @@ TEST(AddVector, CLIENT_TEST) {
                 server::TimeRecorder rc("Add " + std::to_string(count) + " binary vectors in one batch");
                 std::vector<std::string> ids;
                 session.interface()->add_binary_vector_batch(ids, group.id, bin_tensor_list_2);
+                ASSERT_TRUE(!ids.empty());
                 rc.Elapse("done!");
             }
 #endif