py/objobject: Add object.__setattr__ function.

Allows assigning attributes on class instances that implement their own
__setattr__.  Both object.__setattr__ and super(A, b).__setattr__ will work
with this commit.

1 files changed, 26 insertions, 0 deletions

diff --git a/tests/basics/class_delattr_setattr.py b/tests/basics/class_delattr_setattr.py
index 190b4875b9..8fe1bb6fc1 100644
--- a/tests/basics/class_delattr_setattr.py
+++ b/tests/basics/class_delattr_setattr.py
@@ -60,3 +60,29 @@ try:
     print(a.a)
 except AttributeError:
     print("AttributeError")
+
+# test object.__setattr__
+class C:
+    def __init__(self):
+        pass
+
+    def __setattr__(self, attr, value):
+        print(attr, "=", value)
+
+c = C()
+c.a = 5
+try:
+    print(c.a)
+except AttributeError:
+    print("AttributeError")
+
+object.__setattr__(c, "a", 5)
+super(C, c).__setattr__("b", 6)
+print(c.a)
+print(c.b)
+
+try:
+    # attribute name must be string
+    object.__setattr__(c, 5, 5)
+except TypeError:
+    print("TypeError")