Example of item() function in Python traversing dictionary

This article mainly introduces examples of using the item() method to traverse a dictionary in Python. for...in is the most commonly used method of traversing a dictionary in Python. Friends who need it can refer to it

There are several ways to traverse Python dictionary, one of which is for...in. I won't explain this. For...in can be seen almost everywhere in Python. The traversal method mentioned below is the item() method.

item()

item() method forms a tuple for each pair of key and value in the dictionary, and puts these tuples Return in list.

DEMO

Code:

The code is as follows:

person={'name':'lizhong','age':'26','city':'BeiJing','blog':'www.jb51.net'}
 
for key,value in person.items():
    
print
 'key=',key,'，value=',value

Execution result:

It can be seen that key receives the key of the dictionary, and value receives the value of the dictionary.
But what if only one parameter is received?

The code is as follows:

person={'name':'lizhong','age':'26','city':'BeiJing','blog':' 
     for x in person.items():
         print x

Execution result

Only one variablereceives the value In the case of , the tuple corresponding to each pair of key and value is directly returned.

Using item() is a bit similar to foreach in php. You can traverse the key => value. If you purely use for..in, you can only get the key value of each pair of elements.

Such as code:

Code As follows:

person={'name':'lizhong','age':'26','city':'BeiJing','blog':'www.jb51.net'}
     
for x in person:
    print x

Execution results:

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