Function jsonb_to_plpython

contrib/jsonb_plpython/jsonb_plpython.c:480–509

 */
PG_FUNCTION_INFO_V1(jsonb_to_plpython);
Datum
jsonb_to_plpython(PG_FUNCTION_ARGS)
{
	PyObject   *result;
	Jsonb	   *in = PG_GETARG_JSONB_P(0);

	/*
	 * Initialize pointer to Decimal constructor. First we try "cdecimal", C
	 * version of decimal library. In case of failure we use slower "decimal"
	 * module.
	 */
	if (!decimal_constructor)
	{
		PyObject   *decimal_module = PyImport_ImportModule("cdecimal");

		if (!decimal_module)
		{
			PyErr_Clear();
			decimal_module = PyImport_ImportModule("decimal");
		}
		Assert(decimal_module);
		decimal_constructor = PyObject_GetAttrString(decimal_module, "Decimal");
	}

	result = PLyObject_FromJsonbContainer(&in->root);
	if (!result)
		PLy_elog(ERROR, "transformation from jsonb to Python failed");

	return PointerGetDatum(result);
}