Calculate strides of a contiguous array. Layout is 'C' or 'F' (Fortran).
(ndim, shape, itemsize, layout)
| 270 | return x |
| 271 | |
| 272 | def strides_from_shape(ndim, shape, itemsize, layout): |
| 273 | """Calculate strides of a contiguous array. Layout is 'C' or |
| 274 | 'F' (Fortran).""" |
| 275 | if ndim == 0: |
| 276 | return () |
| 277 | if layout == 'C': |
| 278 | strides = list(shape[1:]) + [itemsize] |
| 279 | for i in range(ndim-2, -1, -1): |
| 280 | strides[i] *= strides[i+1] |
| 281 | else: |
| 282 | strides = [itemsize] + list(shape[:-1]) |
| 283 | for i in range(1, ndim): |
| 284 | strides[i] *= strides[i-1] |
| 285 | return strides |
| 286 | |
| 287 | def _ca(items, s): |
| 288 | """Convert flat item list to the nested list representation of a |
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