Apply the correct number of arguments to a function

vultron/cmd.py

@@ -38,6 +38,8 @@ class Command:
     self.needs_api_key = True
     self.default = "help"
 
+    # FIXME: add support for argument parsing
+
     self.init()
 
     if self.needs_api_key and api_key is None:
@@ -48,12 +50,13 @@ class Command:
   def exec_shortcut(self, shortcut, *args):
     fn = self.find(shortcut)
     sig = inspect.signature(fn)
+    parity = len(sig.parameters)
 
-    if len(args) < len(sig.parameters):
+    if len(args) < parity:
       name = fn.__name__[len(self.FTR_PRFX):].lower()
-      raise NotEnoughArgs(name, len(sig.parameters) - len(args))
+      raise NotEnoughArgs(name, parity - len(args))
 
-    data = fn(*args)
+    data = fn(*args[:parity])
 
     # FIXME: Let functions choose the output format. This will allow help
     # functions to still return a rendering.