commit 960fca1a5887a277fd6031cf4c4b6fb31b08ebf5
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Sun Dec 08 04:49:07 2019 -0800
committer GitHub <noreply@github.com> Sun Dec 08 04:49:07 2019 -0800
tree 58a3cba812fcbed35e66ca2e3b50ac13ee81b427
parent 9d3cacd5901f8fbbc4f8b78fc35abad01a0e6546

bpo-38979: fix ContextVar "__class_getitem__" method (GH-17497)


now contextvars.ContextVar "__class_getitem__" method returns ContextVar class, not None.

https://bugs.python.org/issue38979

Automerge-Triggered-By: @asvetlov
(cherry picked from commit 28c91631c24e53713ad0e8a2bbae716373f5e53d)

Co-authored-by: AMIR <31338382+amiremohamadi@users.noreply.github.com>

Python/context.c

diff --git a/Python/context.c b/Python/context.c
index f48c376..5c30e47 100644
--- a/Python/context.c
+++ b/Python/context.c
@@ -1010,9 +1010,10 @@
 
 
 static PyObject *
-contextvar_cls_getitem(PyObject *self, PyObject *args)
+contextvar_cls_getitem(PyObject *self, PyObject *arg)
 {
-    Py_RETURN_NONE;
+    Py_INCREF(self);
+    return self;
 }
 
 static PyMemberDef PyContextVar_members[] = {
@@ -1025,7 +1026,7 @@
     _CONTEXTVARS_CONTEXTVAR_SET_METHODDEF
     _CONTEXTVARS_CONTEXTVAR_RESET_METHODDEF
     {"__class_getitem__", contextvar_cls_getitem,
-        METH_VARARGS | METH_STATIC, NULL},
+        METH_O | METH_CLASS, NULL},
     {NULL, NULL}
 };