Python 中的最大浮点数是多少？
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What is the maximum float in Python?
提问by ladyfafa
I think the maximum integer in python is available by calling sys.maxint.
我认为 python 中的最大整数可以通过调用sys.maxint.
What is the maximum floator longin Python?
最大值float或long在 Python 中是多少？
回答by Dave Webb
For floathave a look at sys.float_info:
为了float看看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:
具体来说，sys.float_info.max：
>>> sys.float_info.max
1.7976931348623157e+308
If that's not big enough, there's always positive infinity:
如果这还不够大，总有正无穷大：
>>> infinity = float("inf")
>>> infinity
inf
>>> infinity / 10000
inf
The longtype has unlimited precision, so I think you're only limited by available memory.
该long类型具有无限精度，因此我认为您仅受可用内存的限制。
回答by GWW
sys.maxint is not the largest integer supported by python. It's the largest integer supported by python's regular integer type.
sys.maxint 不是python支持的最大整数。它是 python 的常规整数类型支持的最大整数。
回答by The Aelfinn
If you are using numpy, you can use dtype'float128' and get a max float of 10e+4931
如果您使用numpy的，你可以使用D型“ float128”，并得到的最大浮动10E + 4931
>>> np.finfo(np.float128)
finfo(resolution=1e-18, min=-1.18973149536e+4932, max=1.18973149536e+4932, dtype=float128)
