Class infinity
object +

infinity
The infinity object possess the algebraic properties necessary for use
as a bound on semiinfinite and infinite segments.
This class uses comparisonbyidentity rather than
comparisonbyvalue. What this means, is there are only ever two
instances of this class, representing positive and negative infinity
respectively. All other "instances" of this class are infact
simply references to one of these two, and comparisons are done by
checking which one you've got. This improves speed and reduces memory
use, and is similar in implementation to Python's boolean True and False
objects.
The normal way to obtain references to positive or negative infinity
is to do infinity() or infinity() respectively. It is also possible to
select the sign by passing a single numeric argument to the constructor.
The sign of the argument causes a reference to either positive or
negative infinity to be returned, respectively. For example infinity(1)
is equivalent to infinity(). However, this feature is a little slower
and not recommended for normal use; it is provided only to simplify the
pickling and unpickling of instances of the class.
Example:
>>> x = infinity()
>>> x > 0
True
>>> x + 10 == x
True
>>> segment(10, 10)  segment(x, 0)
segment(0, 10)
>>> import math
>>> math.isinf(x)
True




















a new object with type S, a subtype of T


















Inherited from object :
__delattr__ ,
__format__ ,
__getattribute__ ,
__init__ ,
__reduce_ex__ ,
__setattr__ ,
__sizeof__ ,
__subclasshook__

Inherited from object :
__class__

__hash__(x)
(Hashing function)


hash(x)
 Overrides:
object.__hash__

 Returns: a new object with type S, a subtype of T
 Overrides:
object.__new__

Pickle support
 Overrides:
object.__reduce__

__repr__(x)
(Representation operator)


repr(x)
 Overrides:
object.__repr__

__str__(x)
(Informal representation operator)


str(x)
 Overrides:
object.__str__
