speed up,only "function" need "params"

when type is "module" or "class", then throw error , is very slowly

plugins/c9.ide.language.python/server/jedi_server.py

@@ -50,11 +50,12 @@ class Daemon(BaseHTTPRequestHandler):
 def to_json(mode, nodoc):
     include_pos = mode == "goto_definitions"
     def to_json(c):
-        try:
-            paramList = { p.description for p in c.params }
-            params = ", ".join([p for p in paramList if p != None and p != "self"])
-        except:
-            params = ""
+        if c.type == "function":
+            try:
+                paramList = { p.description for p in c.params }
+                params = ", ".join([p for p in paramList if p != None and p != "self"])
+            except:
+                params = ""
         return remove_nulls({
             "name": c.name + ("(" + params + ")" if c.type == "function" else ""),
             "replaceText": c.name + "(^^)" if c.type == "function" else None,
@@ -95,4 +96,4 @@ if __name__ == "__main__":
     parser.add_argument("--port", type=int, help="The port for the daemon to listen on")
     parser.add_argument("--nodoc", help="Don't include docstrings in output")
     args = parser.parse_args()
-    main(args)
+    main(args)