解释这个更高级的python输出格式代码

Question

这段代码有什么作用？

for x in range(1,11):
    print('{0:2d} {1:3d} {2:4d}'.format(x,x**2,x**3))

Answer 1

0: | 1: | 2:  => The position in the arg list from which to get 
                 the value.  The order can be anything you want, and
                 you can repeat values, e.g. '{2:...} {0:...} {1:...} {0:...}' 

2 | 3 | 4     => The minimum width of the field in which to display 
                 the value.  Right justified by default for numbers.


d             => The value must be an integer and it will be displayed in 
                 base 10 format (v. hex, octal, or binary format)

下面是一个例子：

s = "{2:2d}\n{0:3d}\n{1:4d}".format(2, 4, 6)
print(s)

--output:--
 6
  2
   4