Get the slice[start:stop:step] of any Python iterable

sliceable.py

class Sliceable:
  def __init__(self, iterable):
    self.it = iterable

  def __getitem__(self, index):
    if isinstance(index, int):
      return self.it[int]

    start = 0 if index.start is None else index.start
    stop = inf if index.stop is None else index.stop
    
    for idx, item in enumerate(self):
      if idx < start:
        continue
      if idx >= stop:
        break
      
      yield item

  def __iter__(self):
    return iter(self.it)