'is' versus '=='

[Isaac To Kar Keung]

>>>>> "Alan" == Alan Daniels <daniels at alandaniels dot com> writes:

    Alan> As an example (if I recall correctly), the integers 0 through 100
    Alan> are pre-created since they're used in code so often.

Actually, -1 through 99...

>>> a=100
>>> b=100
>>> a is b
0
>>> a=99
>>> b=99
>>> a is b
1
>>> a=-1
>>> b=-1
>>> a is b
1
>>> a=-2
>>> b=-2
>>> a is b
0

Regards,
Isaac.