From cdba2c47ee748c2acb12bd8ff7ef8fbae6c2e50f Mon Sep 17 00:00:00 2001
From: Alex Yatskov <alex@foosoft.net>
Date: Tue, 4 Jul 2017 11:29:09 -0700
Subject: [PATCH] improvements to python interop

---
 AnkiConnect.py | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/AnkiConnect.py b/AnkiConnect.py
index 7de771b..a24a1db 100644
--- a/AnkiConnect.py
+++ b/AnkiConnect.py
@@ -567,12 +567,25 @@ class AnkiConnect:
 
     def handler(self, request):
         action = 'api_' + request.get('action', '')
-        params = request.get('params', {})
         if hasattr(self, action):
-            try:
-                return getattr(self, action)(**params)
-            except TypeError:
-                return None
+            handler = getattr(self, action)
+            if callable(handler):
+                argsAll = handler.__code__.co_varnames[1:]
+                argsReq = argsAll
+
+                argsDef = handler.__defaults__
+                if argsDef is not None:
+                    argsReq = argsAll[:-len(argsDef)]
+
+                params = request.get('params', {})
+                for argReq in argsReq:
+                    if argReq not in params:
+                        return
+                for param in params:
+                    if param not in argsAll:
+                        return
+
+                handler(**params)
 
 
     def api_deckNames(self):