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diff --git a/circuitpython/py/objexcept.h b/circuitpython/py/objexcept.h
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+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * SPDX-FileCopyrightText: Copyright (c) 2014 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef MICROPY_INCLUDED_PY_OBJEXCEPT_H
+#define MICROPY_INCLUDED_PY_OBJEXCEPT_H
+
+#include "py/obj.h"
+#include "py/objtuple.h"
+#include "py/objtraceback.h"
+
+typedef struct _mp_obj_exception_t {
+    mp_obj_base_t base;
+    mp_obj_tuple_t *args;
+    mp_obj_traceback_t *traceback;
+} mp_obj_exception_t;
+
+void mp_obj_exception_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind);
+void mp_obj_exception_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest);
+mp_obj_exception_t *mp_obj_exception_get_native(mp_obj_t self_in);
+
+#define MP_DEFINE_EXCEPTION(exc_name, base_name) \
+    const mp_obj_type_t mp_type_##exc_name = { \
+        { &mp_type_type }, \
+        .name = MP_QSTR_##exc_name, \
+        .print = mp_obj_exception_print, \
+        .make_new = mp_obj_exception_make_new, \
+        .attr = mp_obj_exception_attr, \
+        .parent = &mp_type_##base_name, \
+    };
+
+#endif // MICROPY_INCLUDED_PY_OBJEXCEPT_H