Python中int()函数的用法

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

>>> int(12.0)  
12  

>>> int('12',16)  
18  

>>> int('0xa',16)  
10  
>>> int('10',8)  
8