python 字典items和iteritems

3.4.6 items和iteritems

1. 说明：items以列表方式返回字典中的键值对，iteritems以迭代器对象 返回键值对儿(Python3中不再支持）；
2. 例子：

    1:  >>> x
   
    2:  {'name': 'Bill'}
   
    3:  >>> x.items()
   
    4:  dict_items([('name', 'Bill')])
   
    5:  
   
    6:  #python3中不再包含iteritems
   
    7:  >>> x.iteritems()
   
    8:  Traceback (most recent call last):
   
    9:    File "<pyshell#66>", line 1, in <module>
   
   10:      x.iteritems()
   
   11:  AttributeError: 'dict' object has no attribute 'iteritems'
   
   12: