Python 字符串格式化

print 'My age is' + str(18)str1='good'str2='bye'print str1+str2num= 18print 'My age is' + str( num )num= 20print 'My age is %d'%numprint 'Price is %f'%4.99print 'Price is %.2f'%4.99name='crossin'print '%s is a good teacher.'%nameprint '%s %name is a good teacher.'print '%s  is a good  %name teacher.'print 'Today is %s.' %'Friday'

结果：

My age is18
goodbye
My age is18
My age is 20
Price is 4.990000
Price is 4.99
crossin is a good teacher.
%s %name is a good teacher.
%s  is a good  %name teacher.
Today is Friday.