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-rw-r--r--Objects/listobject.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/Objects/listobject.c b/Objects/listobject.c
index edd4a15..59f6881 100644
--- a/Objects/listobject.c
+++ b/Objects/listobject.c
@@ -2297,6 +2297,12 @@ list_init(PyListObject *self, PyObject *args, PyObject *kw)
if (!PyArg_ParseTupleAndKeywords(args, kw, "|O:list", kwlist, &arg))
return -1;
+ if (arg != NULL && PyTuple_GET_SIZE(args) == 0) {
+ if (PyErr_Warn(PyExc_DeprecationWarning,
+ "Using 'sequence' as a keyword argument is deprecated; "
+ "specify the value as a positional argument instead") < 0)
+ return -1;
+ }
/* Verify list invariants established by PyType_GenericAlloc() */
assert(0 <= Py_SIZE(self));