问题描述
是否有一些像 INT_MAX 这样的预定义常量?
Is there some pre-defined constant like INT_MAX?
推荐答案
Python 具有任意精度整数，因此没有真正的固定最大值.您只受到可用内存的限制.
Python has arbitrary precision integers so there is no true fixed maximum. You're only limited by available memory.
在 Python 2 中，有两种类型，int 和 long.ints 使用 C 类型，而 longs 是任意精度.您可以使用 sys.maxint 找到最大 int.但是ints会自动提升为long，所以你通常不用担心:
In Python 2, there are two types, int and long. ints use a C type, while longs are arbitrary precision. You can use sys.maxint to find the maximum int. But ints are automatically promoted to long, so you usually don't need to worry about it:
sys.maxint + 1
工作正常并返回 long.
sys.maxint 甚至在 Python 3 中都不存在，因为 int 和 long 被统一为一个任意精度的 int 输入.
sys.maxint does not even exist in Python 3, since int and long were unified into a single arbitrary precision int type.
