def __cmp__(self, other):
"""Compare two key ranges.
Key ranges with a value of None for key_start or key_end, are always
considered to have include_start=False or include_end=False, respectively,
when comparing. Since None indicates an unbounded side of the range,
the include specifier is meaningless. The ordering generated is total
but somewhat arbitrary.
Args:
other: An object to compare to this one.
Returns:
-1: if this key range is less than other.
0: if this key range is equal to other.
1: if this key range is greater than other.
"""
if not isinstance(other, KeyRange):
return 1
self_list = [self.key_start, self.key_end, self.direction,
self.include_start, self.include_end, self._app,
self.namespace]
if not self.key_start:
self_list[3] = False
if not self.key_end:
self_list[4] = False
other_list = [other.key_start,
other.key_end,
other.direction,
other.include_start,
other.include_end,
other._app,
other.namespace]
if not other.key_start:
other_list[3] = False
if not other.key_end:
other_list[4] = False
return cmp(self_list, other_list)
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