常见的格式符:
%s :字符串 ( 采用 str() 的显示 )
%r :字符串 ( 采用 repr() 的显示 )
%d :整数 ( 十进制 )
%f :浮点数
示例1:
In [1]: name = "Tom" In [2]: age = 20 In [3]: "My name is %s" % name Out[3]: 'My name is Tom' In [4]: "My name is %r" % name Out[4]: "My name is 'Tom'" In [5]: "My age is %d" % age Out[5]: 'My age is 20' In [6]: "My age is %f" % age Out[6]: 'My age is 20.000000' In [7]: "My age is %.3f" % age Out[7]: 'My age is 20.000'