isinstance()和__name__

 # coding: utf-8

 def displayNumType(num):
     print num, 'is',
     if isinstance(num, (int, long, float, complex)):      # 如果变量num的值为元组(int, long, float, complex)中的一个，则运行此if块
         print 'a number of type:', type(num).__name__     # 打印'a number of type:', 变量num的类名
     else:
         print 'not a number at all!!'

 displayNumType(-69)
 displayNumType(99999999999999999999999999999L)
 displayNumType(98.6)
 displayNumType(-5.2+1.9j)
 displayNumType('xxx')

运行结果：

关于isinstance():

关于__name__: