del下面是一个说明此行为的示例：>>> classDict(dict):... def__delitem__(self, key) -> None:... print(f"Running .__delitem__() to delete {(key, self[key])}")... super().__delitem__(key)...>>> ordinals = Dict(... {"First": "I", "Second": "II", "Third...
>>>lst=[1,2,3]>>>del(2)File"<stdin>",line1SyntaxError:cannot delete literal del还可以删除整个列表: 代码语言:python 代码运行次数:0 运行 AI代码解释 >>>lst=[1,2,3]>>>del(lst)>>>lst Traceback(most recent call last):File"<stdin>",line1,in<module>NameError:name'lst'isnotdefined ...
The reason for this is that you only delete the name,not the list itself,In fact ,there is no way to delete values in python(and you don’t really need to because the python interpreter does it by itself whenever you don’t use the value anymore) 举个例子,一个数据(比如例子中的列表)...
Thepop()method is another way to remove an element from a list in Python. By default,pop()removes and returns the last element from the list. However, we can also specify the index of the element to be removed. So, here we will use the index number of the first element to remove i...
L.pop([index]) -> item -- remove and return item at index (default last). Raises IndexError if list is empty or index is out of range. pop是删除指定索引位置的元素,参数是 index。如果不指定索引,默认删除列表最后一个元素。 >>>lst=[1,2,3]>>>lst.pop(1)2>>>lst[1,3]>>>lst=[1...
olditem = shoplist[0] del shoplist[0] #del的是引用,而不是对象 print ('I bought the',olditem) print ('My shopping list is now', shoplist) print(shoplist[0]) 结果为: The first item I will buy is apple I bought the apple
>>>lst=[1,2,3]>>>del(2)File"<stdin>",line1SyntaxError:cannot delete literal 1. 2. 3. 4. del还可以删除整个列表: >>>lst=[1,2,3]>>>del(lst)>>>lst Traceback(most recent call last):File"<stdin>",line1,in<module>NameError:name'lst'isnotdefined 1. ...
python中delete的用法 在Python中，`del`（不是`delete`，Python中没有名为`delete`的内置函数或关键字，这里按照正确的`del`来讲解用法）是一个非常有用的操作符。一、基本用法 1. 删除变量 - 在Python中，如果你想删除一个不再需要的变量，就可以使用`del`。例如，你定义了一个变量`x = 10`，后来发现不...
(从 0 开始)delete(first, last=None)删除参数 first 到 last 范围内(包含 first 和 last)的所有选项get(first, last=None)返回一个元组,包含参数 first 到 last 范围内(包含 first 和 last)的所有选项的文本index(index)返回与 index 参数相应选项的序号itemcget(index, option)获得 index 参数指定的项目...
| Return key in self. | | __delitem__(self, key, /) | Delete self[key]. | | __eq__(self, value, /) | Return self==value. | | __ge__(self, value, /) | Return self>=value. | | __getattribute__(self, name, /) ...