I would like to have a useful rappresentation of infinite, is there
already something??
I was thinking to something like this
class Inf(int):
"""numero infinito"""
def __init__(self,negative=False):
self.negative = negative
def __cmp__(self,y):
"""infinito maggiore di qualasiasi cosa"""
if self.negative:
return -1
else:
return 1
def __repr__(self):
"""docstring for __repr__"""
if self.negative:
return '-inf'
else:
return 'inf'
def __add__(self,y):
"""addizione con infinito"""
return self
def __mul__(self,y):
"""moltiplicazione"""
import types
if isinstance(y,types.IntType):
if y > 0:
return self
if y == 0:
return 'indefinito'
else:
return Inf(negative)
I'd like to be able to compare between any value and infinite always
getting the right result, and paying attention to the special cases
like
inf / inf => not determinate
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