TypeError: not all arguments converted during string formatting

1、错误描述

>>> a=1;
>>> b=1;
>>> for i in range(1,21):
print('121d %121d' % (a,b));
if(i%3==0):
a=a+b ;
b=a+b;


Traceback (most recent call last):
File "<pyshell#23>", line 2, in <module>
print('121d %121d' % (a,b));
TypeError: not all arguments converted during string formatting
>>> 

2、错误原因

      由错误提示可知，并不是所有的参数都可以转换成字符串格式

3、解决办法

>>> a=1;
>>> b=1;
>>> for i in range(1,21):
print('%12ld %12ld' % (a,b));
if((i%3)==0):
print("");
a=a+b;
b=a+b;


1            1
1            1
1            1

2            3
2            3
2            3

5            8
5            8
5            8

13           21
13           21
13           21

34           55
34           55
34           55

89          144
89          144
89          144

233          377
233          377
>>>