How to use items in python

In Python, the items() method is usually used for dictionary objects to return all key-value pairs of the dictionary. This is a member method of a dictionary, so you cannot use it directly on any object unless that object is a dictionary.

Here is an example:

# 创建一个字典  
my_dict = {'name': 'Alice', 'age': 25, 'city': 'New York'}  
  
# 使用 items() 方法  
items = my_dict.items()  
  
# 打印字典的键值对  
for item in items:  
    print(item)

This will output:

arduino
('name', 'Alice')  
('age', 25)  
('city', 'New York')

Each key-value pair is returned as a tuple, where the first element is the key , the second element is the value.

Note that items() returns a "view" object (in Python 3.3 and later), which means that it is a snapshot of the dictionary, reflecting the contents of the original dictionary. If you change the original dictionary, the view object will not be updated. If you want to create a new dictionary, you can use the dict() function, or use the list() function to convert the view to a list.

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