python格式化输出

1、打印字符串

>>> print ("His name is %s"%("Aviad")) His name is Aviad

2.打印整数

>>> print ("He is %d years old"%(25)) He is 25 years old

3.打印浮点数

>>> print ("His height is %f m"%(1.83)) His height is 1.830000 m

4.打印浮点数（指定保留小数点位数）

>>> print ("His height is %.2f m"%(1.83)) His height is 1.83 m

5.指定占位符宽度

>>> print ("Name:s Age: