如何在Python中声明和添加项目到数组?

问题描述：

我正在尝试将项目添加到python中的数组.

I'm trying to add items to an array in python.

我跑步

array = {}

然后，我尝试通过以下操作向此数组添加一些内容:

Then, I try to add something to this array by doing:

array.append(valueToBeInserted)

似乎没有.append方法.如何将项目添加到数组?

There doesn't seem to be a .append method for this. How do I add items to an array?

答

{}代表空字典，而不是数组/列表.对于列表或数组，您需要[].

{} represents an empty dictionary, not an array/list. For lists or arrays, you need [].

要初始化一个空列表，请执行以下操作:

To initialize an empty list do this:

my_list = []

或

my_list = list()

要将元素添加到列表中，请使用append

To add elements to the list, use append

my_list.append(12)

要extend列表以包含另一个列表中的元素，请使用extend

To extend the list to include the elements from another list use extend

my_list.extend([1,2,3,4])
my_list
--> [12,1,2,3,4]

要从列表中删除元素，请使用remove

To remove an element from a list use remove

my_list.remove(2)

字典表示键/值对的集合，也称为关联数组或映射.

Dictionaries represent a collection of key/value pairs also known as an associative array or a map.

要初始化空字典，请使用{}或dict()

To initialize an empty dictionary use {} or dict()

字典具有键和值

my_dict = {'key':'value', 'another_key' : 0}

要使用其他词典的内容扩展词典，可以使用update方法

To extend a dictionary with the contents of another dictionary you may use the update method

my_dict.update({'third_key' : 1})

要从字典中删除值

del my_dict['key']