I think the maximum integer in python is available by calling sys.maxint.
What is the maximum float or long in Python?
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long-integer
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If you are using numpy, you can use dtype 'float128' and get a max float of 10e+4931
>>> np.finfo(np.float128)
finfo(resolution=1e-18, min=-1.18973149536e+4932, max=1.18973149536e+4932, dtype=float128)
sys.maxint is not the largest integer supported by python. It's the largest integer supported by python's regular integer type.
For all practical purposes, and with no import at all, one can use:
x = float("inf")
More detail on this related question: How can I represent an infinite number in Python?
For float have a look at sys.float_info:
>>> import sys
>>> sys.float_info
sys.floatinfo(max=1.7976931348623157e+308, max_exp=1024, max_10_exp=308, min=2.2
250738585072014e-308, min_exp=-1021, min_10_exp=-307, dig=15, mant_dig=53, epsil
on=2.2204460492503131e-16, radix=2, rounds=1)
Specifically, sys.float_info.max:
>>> sys.float_info.max
1.7976931348623157e+308
If that's not big enough, there's always positive infinity:
>>> infinity = float("inf")
>>> infinity
inf
>>> infinity / 10000
inf
The long type has unlimited precision, so I think you're only limited by available memory.
Source: Stackoverflow.com