1、输出十六进制，十进制，八进制
>>> hex = 0xff
>>> print ‘hex=%x,dec=%d,oct=%o‘ %(hex,hex,hex)
hex=ff,dec=255,oct=377
2、输出浮点数
>>> import math
>>> print ‘%f‘ %math.pi
3.141593
>>> print ‘%5.3f‘ %math.pi
3.142
>>> print ‘%10.3f‘ %math.pi
3.142
>>> string = ‘independent‘
>>> print ‘%.3s‘ %string
ind
>>> print ‘%.*s‘ %(4,string)
inde
>>> print ‘%10.5s‘ %string
indep
3、自动换行
print i,