| import collections | |
| from itertools import repeat | |
| def _ntuple(n): | |
| def parse(x): | |
| if isinstance(x, collections.Iterable): | |
| return x | |
| return tuple(repeat(x, n)) | |
| return parse | |
| _single = _ntuple(1) | |
| _pair = _ntuple(2) | |
| _triple = _ntuple(3) | |
| _quadruple = _ntuple(4) |