.. cfunction:: void PyErr_PrintEx(int set_sys_last_vars)

Print a standard traceback to ``sys.stderr`` and clear the error indicator.

Call this function only when the error indicator is set. (Otherwise it will

cause a fatal error!)

If *set_sys_last_vars* is nonzero, the variables :data:`sys.last_type`,

:data:`sys.last_value` and :data:`sys.last_traceback` will be set to the

type, value and traceback of the printed exception, respectively.

.. cfunction:: void PyErr_Print()

Alias for ``PyErr_PrintEx(1)``.

.. cfunction:: PyObject* PyErr_Occurred()