Update sdoc_request.py

sdoc_request.py

@@ -23,7 +23,15 @@ def get_tianshu_response(params):
         "biz_code": biz_code,
         "params": params
     })
-    result = response["info"].get("info")
+
+    if response is not None:
+        info = response.get("info")
+        if info is not None:
+            result = info.get("info")
+        else:
+            result = None
+    else:
+        result = None
 
     return result