python中删除字典的指定键值对

 

1、

>>> a = {"a":111,"b":222,"c":333,"d":444} >>> a {'a': 111, 'b': 222, 'c': 333, 'd': 444} >>> del a["a"] >>> a {'b': 222, 'c': 333, 'd': 444} >>> del a["c"] >>> a {'b': 222, 'd': 444}

 

2、

>>> a = dict( a = 111, b = 222, c = 333, d = 444) >>> a {'a': 111, 'b': 222, 'c': 333, 'd': 444} >>> a.pop("a") 111
>>> a {'b': 222, 'c': 333, 'd': 444} >>> a.pop("c") 333
>>> a {'b': 222, 'd': 444}

 

3、

>>> a = dict(a = 111, b = 222, c = 333, d = 444) >>> a {'a': 111, 'b': 222, 'c': 333, 'd': 444} >>> a.popitem() ('d', 444) >>> a {'a': 111, 'b': 222, 'c': 333} >>> a.popitem() ('c', 333) >>> a {'a': 111, 'b': 222}