Python 溢出错误何时产生？
When is a Python Overflow Error generated?
为什么下面三行在 python3 中产生不同的输出，尽管值相等？
>>> 10 ** 500
100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
>>>1E500
inf
>>>1E250 ** 2
---------------------------------------------------------------------------
OverflowError Traceback (most recent call last)
<ipython-input-110-d71dbae32ab9> in <module>
----> 1 1E250**2
它们不相等。第一个是整数，Python允许整数无限大。 （好吧，实际上是无限的。）另外两个是浮点数，值超出了双精度的范围。 1E500 值是一个常量，常量溢出导致 inf pseudo-value。最后一个是算术运算，Python检测并抛出算术运算溢出
为什么下面三行在 python3 中产生不同的输出，尽管值相等？
>>> 10 ** 500
100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
>>>1E500
inf
>>>1E250 ** 2
---------------------------------------------------------------------------
OverflowError Traceback (most recent call last)
<ipython-input-110-d71dbae32ab9> in <module>
----> 1 1E250**2
它们不相等。第一个是整数，Python允许整数无限大。 （好吧，实际上是无限的。）另外两个是浮点数，值超出了双精度的范围。 1E500 值是一个常量，常量溢出导致 inf pseudo-value。最后一个是算术运算，Python检测并抛出算术运算溢出