fix(ctypesutil): correctly apply wrapped lib function as CLibrary member (hardbyte#1116)

semcodech · 0xa5a5 · web-flow · commit 44bd901b55c5 · 2021-08-14T11:06:23.000+12:00
Co-authored-by: Simon Ausserlechner &lt;s.ausserlechner@gmail.com&gt;
diff --git a/can/ctypesutil.py b/can/ctypesutil.py
@@ -55,13 +55,13 @@ def map_symbol(
         else:
             prototype = _FUNCTION_TYPE(restype)
         try:
-            self.func_name = prototype((func_name, self))
+            func = prototype((func_name, self))
         except AttributeError:
             raise ImportError(
                 f'Could not map function "{func_name}" from library {self._name}'
             ) from None
 
-        self.func_name._name = func_name  # pylint: disable=protected-access
+        func._name = func_name  # pylint: disable=protected-access
         log.debug(
             'Wrapped function "%s", result type: %s, error_check %s',
             func_name,
@@ -70,9 +70,10 @@ def map_symbol(
         )
 
         if errcheck is not None:
-            self.func_name.errcheck = errcheck
+            func.errcheck = errcheck
 
-        return self.func_name
+        setattr(self, func_name, func)
+        return func
 
 
 if sys.platform == "win32":
