学步园

int()是Python的一个内部函数

Python系统帮助里面是这么说的

>>> help(int)<br /> Help on class int in module __builtin__:<br /> class int(object)<br /> | int(x[, base]) -> integer<br /> |<br /> | Convert a string or number to an integer, if possible. A floating point<br /> | argument will be truncated towards zero (this does not include a string<br /> | representation of a floating point number!) When converting a string, use<br /> | the optional base. It is an error to supply a base when converting a<br /> | non-string. If base is zero, the proper base is guessed based on the<br /> | string content. If the argument is outside the integer range a<br /> | long object will be returned instead. 

>>> int(12.0)<br /> 12<br />  

int()函数可以将一个数转化为整数

>>> int('12',16)<br /> 18 

这里有两个地方要注意：1）12要以字符串的形式进行输入，如果是带参数base的话

2）这里并不是将12转换为16进制的数，而是说12就是一个16进制的数，int()函数将其用十进制数表示，如下

>>> int('0xa',16)<br /> 10<br /> >>> int('10',8)<br /> 8