provide PyMapping_Keys

Author: timfel

graalpython/com.oracle.graal.python.cext/src/abstract.c

@@ -266,6 +266,11 @@ PyObject * PyMapping_GetItemString(PyObject *o, const char *key) {
     return UPCALL_CEXT_O(_jls_PyObject_GetItem, native_to_java(o), polyglot_from_string(key, SRC_CS));
 }
 
+UPCALL_ID(PyMapping_Keys);
+PyObject * PyMapping_Keys(PyObject *o) {
+    return UPCALL_CEXT_O(_jls_PyMapping_Keys, native_to_java(o));
+}
+
 // taken from CPython "Objects/abstract.c"
 int PyObject_GetBuffer(PyObject *obj, Py_buffer *view, int flags) {
     PyBufferProcs *pb = obj->ob_type->tp_as_buffer;

graalpython/lib-graalpython/python_cext.py

@@ -1258,3 +1258,8 @@ def PySlice_GetIndicesEx(start, stop, step, length):
 @may_raise
 def PySlice_New(start, stop, step):
     return slice(start, stop, step)
+
+
+@may_raise
+def PyMapping_Keys(obj):
+    return list(obj.keys())