def assert_parse_roundtrip(expr_str):
    expr = parse(expr_str)
    from pymbolic.mapper.stringifier import StringifyMapper
    strified = StringifyMapper()(expr)
    assert (strified == expr_str), (strified, expr_str)
def assert_parse_roundtrip(expr_str):
    expr = parse(expr_str)
    from pymbolic.mapper.stringifier import StringifyMapper
    strified = StringifyMapper()(expr)
    assert (strified == expr_str), (strified, expr_str)