python % format

1. 求模运算，相当于mod，也就是计算除法的余数，比如5%2就得到1。

2. %还用在python的格式化输出，比如：
a = 'test'
print 'it is a %s' %(a)
打印的结果就是 it is a test

**本文章来自于[python123](https://www.python123.io/student/courses/371/intro)的课件** ![在这里插入图片描述](https://img-blog.csdnimg.cn/20190814011139289.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N1eXVlcw==,size_16,color_FFFFFF,t_70) ![在这里插入图片描述](https://img-blog.csdnimg.cn/20190814011205196.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N1eXVlcw==,size_16,color_FFFFFF,t_70) ![在这里插入图片描述](https://img-blog.csdnimg.cn/2019081401122965.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N1eXVlcw==,size_16,color_FFFFFF,t_70) ![在这里插入图片描述](https://img-blog.csdnimg.cn/20190814011246416.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N1eXVlcw==,size_16,color_FFFFFF,t_70) ![在这里插入图片描述](https://img-blog.csdnimg.cn/20190814011316841.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N1eXVlcw==,size_16,color_FFFFFF,t_70) ![在这里插入图片描述](https://img-blog.csdnimg.cn/20190814011332459.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N1eXVlcw==,size_16,color_FFFFFF,t_70)

1. 求模运算，相当于mod，也就是计算除法的余数，比如5%2就得到1。

2. %还用在python的格式化输出，比如： a = 'test' print 'it is a %s' %(a) 打印的结果就是 it is a test

2. %还用在python的格式化输出，比如：
a = 'test'
print 'it is a %s' %(a)
打印的结果就是 it is a test