关于python：int()和long()之间的区别

Difference between int() and long()

python中int(x)和long(x)有什么区别

我的理解：

long()将始终返回long

int()将返回一个int或long(如果太大)

所以int()足以根据其值动态获取int / long

因此，除非以上(1)(2)(3)不正确，否则为什么需要long()？当int()完成工作时？
跳过所有数字范围的long()会伤害我吗？

参考文档：

类int(x = 0)

Return an integer object constructed from a number or string x, or
return 0 if no arguments are given. If x is a number, it can be a
plain integer, a long integer, or a floating point number. If x is
floating point, the conversion truncates towards zero. If the argument
is outside the integer range, the function returns a long object
instead.

类长(x = 0)

Return a long integer object constructed from a string or number x. If
the argument is a string, it must contain a possibly signed number of
arbitrary size, possibly embedded in whitespace. The base argument is
interpreted in the same way as for int(), and may only be given when x
is a string. Otherwise, the argument may be a plain or long integer or
a floating point number, and a long integer with the same value is
returned. Conversion of floating point numbers to integers truncates
(towards zero). If no arguments are given, returns 0L.

实验代码

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number = int(number_string) # cast it to integer
print number,"\t", type(number)

number = long(number_string) # cast it to long
print number,"\t", type(number)