Method new_from_ffi_tuple

src/err.rs:228–245

(
        py: Python,
        ptype: *mut ffi::PyObject,
        pvalue: *mut ffi::PyObject,
        ptraceback: *mut ffi::PyObject,
    )

    }

    unsafe fn new_from_ffi_tuple(
        py: Python,
        ptype: *mut ffi::PyObject,
        pvalue: *mut ffi::PyObject,
        ptraceback: *mut ffi::PyObject,
    ) -> PyErr {
        // Note: must not panic to ensure all owned pointers get acquired correctly,
        // and because we mustn't panic in normalize().
        PyErr {
            ptype: if ptype.is_null() {
                py.get_type::<exc::SystemError>().into_object()
            } else {
                PyObject::from_owned_ptr(py, ptype)
            },
            pvalue: PyObject::from_owned_ptr_opt(py, pvalue),
            ptraceback: PyObject::from_owned_ptr_opt(py, ptraceback),
        }
    }

    fn new_helper(_py: Python, ty: PyType, value: PyObject) -> PyErr {
        assert!(unsafe { ffi::PyExceptionClass_Check(ty.as_object().as_ptr()) } != 0);