The index position of the element you want to remove is the only optional argument for the pop method in Python. If you don’t give the method an index position, it will take the final element out of the list. Return Value of the Pop Function in Python The element that was deleted fr...
Example The value of the removed item is the return value of the pop() method: car = { "brand": "Ford", "model": "Mustang", "year": 1964}x = car.pop("model")print(x) Try it Yourself » ❮ Dictionary Methods Track your progress - it's free! Log in Sign Up ...
❮ List Methods ExampleGet your own Python Server Remove the second element of thefruitlist: fruits = ['apple','banana','cherry'] fruits.pop(1) Try it Yourself » Definition and Usage Thepop()method removes the element at the specified position. ...
KeyError Traceback (most recent call last) <ipython-input-27-4f7229078c3c> in <module>() 1 site= {'name': '菜鸟教程', 'alexa': 10000, 'url': 'www.runoob.com'} ---> 2 pop_obj=site.pop('method') 3 print (pop_obj) # 输出 :None KeyError: 'method' 1. 2. 3. 4. 5. 6...
现在很多语言都是面向对象（OOP）的编程思想，比如Java、Python、JS等为代表。然后聊起面向对象，虽然我们...
<ipython-input-27-4f7229078c3c> in <module>() 1 site= {'name': '菜鸟教程', 'alexa': 10000, 'url': 'www.runoob.com'} ---> 2 pop_obj=site.pop('method') 3 print (pop_obj) # 输出 :None KeyError: 'method' popitem()随机删除字典中的一个键值对,并且返回该键值对,(key,value...
绝对是开发的好帮手。...setslice__', '__sizeof__', '__str__', '__subclasshook__', 'append', 'count', 'extend', 'index', 'insert', 'pop...', 'remove', 'reverse', 'sort'] 然后查看list的pop方法的作用和用法: help(list.pop) 输出: Help on method_descriptor:...pop(.....
File "<pyshell#2>", line 1, in <module> c = dict.pop()TypeError: unbound method dict.pop() needs an argument >>> dict1 = {"papa":"xy","sis":"nikki","dude":"cwy"} >>> c = dict1.pop("papa")>>> print(c,dict1)xy {'sis': 'nikki', 'dude': 'cwy'} >>> dict2 =...
File "<pyshell#2>", line 1, in <module> c = dict.pop() TypeError: unbound method dict.pop() needs an argument 1. 2. 3. 4. 5. 6. >>> dict1 = {"papa":"xy","sis":"nikki","dude":"cwy"} >>> c = dict1.pop("papa") ...
>>>d.popitem()(2,None)>>>d.popitem()(100,100)>>>d.popitem()Traceback(most recent call last):File"<stdin>",line1,in<module>KeyError:'popitem(): dictionary is empty'>>>d{} pop() >>>help(dict.pop)Helpon method_descriptor:pop(...)D.pop(k[,d])->v,removespecified key andret...