def start(self, callback):

        def cb_wrapper(prepare_h):
            callback(self)

        self._ffi_cb = ffi.callback('void (*)(uv_prepare_t *)', cb_wrapper)
        libuv.uv_prepare_start(self.handle, self._ffi_cb)
:type callback: Callable(prepare_handle: Prepare)
dataset/ETHPy150Open veegee/guv/pyuv_cffi/__init__.py/Prepare.start