diff --git a/python/examples/pipeline/simple_web_service/web_service_java.py b/python/examples/pipeline/simple_web_service/web_service_java.py
index a32ba0ee5417757d6c2210a2cfa2481d7a8a115c..da944a1df2a3265f930eb458c11709dd6b9402ee 100644
--- a/python/examples/pipeline/simple_web_service/web_service_java.py
+++ b/python/examples/pipeline/simple_web_service/web_service_java.py
@@ -36,7 +36,7 @@ class UciOp(Op):
         _LOGGER.error("UciOp::preprocess >>> log_id:{}, input:{}".format(
             log_id, input_dict))
         proc_dict = {}
-        x_value = input_dict["x"]
+        x_value = eval(input_dict["x"])
         input_dict["x"] = x_value.reshape(1, 13)
 
         return input_dict, False, None, ""