可迭代对象的检测

检测对象是否属于可迭代的

 1 from collections import Iterable
 2 # 可迭代对象的本质：对象所属的类中包含了__iter__()方法
 3 # 检测一个对象是否可以迭代，用isinstance函数检测
 4 arc = isinstance([1,2,3],Iterable)
 5 print(arc)  #True
 6 arc = isinstance((1,2,3),Iterable)
 7 print(arc)  #True
 8 arc = isinstance({"name":"黄秋生"},Iterable)
 9 print(arc)#True
10 arc = isinstance("xiaoming",Iterable)
11 print(arc)#True
12 arc = isinstance(3,Iterable)
13 print(arc)#False