From 6491eeacdf73d91de107af7fb0bb711cfab0e86f Mon Sep 17 00:00:00 2001
From: DavdGao <gaodawei.gdw@alibaba-inc.com>
Date: Sun, 10 Mar 2024 08:21:09 +0800
Subject: [PATCH] fix bug in service_factory (#52)

---
 src/agentscope/service/service_factory.py | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/src/agentscope/service/service_factory.py b/src/agentscope/service/service_factory.py
index e9e2ad891..ce45cdaf0 100644
--- a/src/agentscope/service/service_factory.py
+++ b/src/agentscope/service/service_factory.py
@@ -114,12 +114,15 @@ def get(
         }
 
         # Prepare default values
-        args_defaults = dict(
-            zip(
-                reversed(argsspec.args),
-                reversed(argsspec.defaults),  # type: ignore
-            ),
-        )
+        if argsspec.defaults is None:
+            args_defaults = {}
+        else:
+            args_defaults = dict(
+                zip(
+                    reversed(argsspec.args),
+                    reversed(argsspec.defaults),  # type: ignore
+                ),
+            )
 
         args_required = sorted(
             list(set(args_agent) - set(args_defaults.keys())),