rpc: fix 0-ady functions raising an exception

Closes epics-base#130
High-Voltage-Engineering · Jan 15, 2024 · 1f4e269 · 1f4e269
1 parent f5c96ba
commit 1f4e269
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/p4p/rpc.py b/src/p4p/rpc.py
@@ -264,7 +264,8 @@ def _wrapMethod(K, V):
     if S.varargs is not None or keywords is not None:
         raise TypeError("vararg not supported for proxy method %s" % K)
 
-    if len(S.args) != len(S.defaults):
+    num_args, num_defaults = (0 if v is None else len(v) for v in (S.args, S.defaults))
+    if num_args != num_defaults:
         raise TypeError("proxy method %s must specify types for all arguments" % K)
 
     try: