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- # created: 23.04.2018
- # Copyright (c) 2018 Manfred Moitzi
- # License: MIT License
- from typing import Iterable
- class Index:
- def __init__(self, item):
- try:
- self.length = len(item)
- except TypeError:
- self.length = int(item)
- def index(self, item: int, error=None) -> int:
- if item < 0:
- result = self.length + int(item)
- else:
- result = int(item)
- if error and not (0 <= result < self.length):
- raise error('index out of range')
- return result
- def slicing(self, *args) -> Iterable[int]:
- if isinstance(args[0], slice):
- s = args[0]
- else:
- s = slice(*args)
- return range(*s.indices(self.length))
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