pwtools.common.toslice

pwtools.common.toslice(val)

A simple wrapper around numpy.s_() taking strings as argument. Convert strings representing Python/numpy slice to slice objects.

Parameters:

val (string) –

Examples

‘3’ -> 3 ‘3:’ -> slice(3, None, None) ‘-2:’ -> slice(-2, None, None) ‘3:7’ -> slice(3, 7, None) ‘3:7:2’ -> slice(3, 7, 2) ‘3::2’ -> slice(3, None, 2) ‘::2’ -> slice(None, None, 2) ‘::-1’ -> slice(None, None, -1)

>>> import numpy as np
>>> np.s_[1:5]
slice(1, 5, None)
>>> toslice('1:5')
slice(1, 5, None)