def __init__(self,
               key_start=None,
               key_end=None,
               direction=None,
               include_start=True,
               include_end=True,
               _app=None):
    """Initialize a KeyRange object.

    Args:
      key_start: The starting key for this range.
      key_end: The ending key for this range.
      direction: The direction of the query for this range.
      include_start: Whether the start key should be included in the range.
      include_end: Whether the end key should be included in the range.
    """
    if direction is None:
      direction = KeyRange.ASC
    assert direction in (KeyRange.ASC, KeyRange.DESC)
    self.direction = direction
    self.key_start = key_start
    self.key_end = key_end
    self.include_start = include_start
    self.include_end = include_end
    self._app = _app
Initialize a KeyRange object.

    Args:
      key_start: The starting key for this range.
      key_end: The ending key for this range.
      direction: The direction of the query for this range.
      include_start: Whether the start key should be included in the range.
      include_end: Whether the end key should be included in the range.
    
mapreduce/lib/key_range/__init__.py