In some algorithms a sentinel value may be useful, so for Python 3.x
sys.maxint may be replaced by an improvement of the following infinite
and neginfinite singleton objects:
class Infinite(object):
def __repr__(self): return "infinite"
def __cmp__(self, other):
if other is infinite: return 0
if other is neginfinite: return 1
other + 1 # type control
return 1
infinite = Infinite()
class NegInfinite(object):
def __repr__(self): return "neginfinite"
def __cmp__(self, other):
if other is neginfinite: return 0
if other is infinite: return -1
other + 1 # type control
return -1
neginfinite = NegInfinite()
Bye,
bearophile
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