(self)
| 2367 | return Lengths(child) |
| 2368 | |
| 2369 | def _layer(self): |
| 2370 | name = f"part-{self._name}" |
| 2371 | dsk = { |
| 2372 | (name, i): (len, (self.frame._name, i)) |
| 2373 | for i in range(self.frame.npartitions) |
| 2374 | } |
| 2375 | dsk[(self._name, 0)] = (tuple, list(dsk.keys())) |
| 2376 | return dsk |
| 2377 | |
| 2378 | |
| 2379 | class ResetIndex(Elemwise): |