def timeit(what, func, *args, **kwargs):
    t0 = time.perf_counter()
    func(*args, **kwargs)
    t1 = time.perf_counter()
    print('%s took %1.2f s' % (what, (t0-t1)))
dataset/ETHPy150Open zoofIO/flexx/flexx/pyscript/tests/test_commonast.py/timeit/swapped operands of `-`