Usage and example of Python dictionary popitem()

Dictionary methods in Python

popitem() returns and deletes the last key-value pair from the dictionary.
If this method is called while the dictionary is already empty, a KeyError exception is thrown in 3.7 In earlier versions, the popitem() method deleted a random item.

The item deleted is the return value of the popitem() method, in the form of a tuple. See the following example.

The syntax of popitem() is:

dict.popitem()

popitem() parameters

popitem() does not accept any parameters.

popitem() return value

popitem()

• Return any element (key, value) pair from the dictionary

• Delete any element from the dictionary (the returned element is the same).

Note: 　Any element and random element are not the same. popitem() does not return a random element.　

Example: How does popitem() work?

person　=　{'name':　'Phill',　'age':　22,　'salary':　3500.0}
result　=　person.popitem()
print('person　=　',person)
print('result　=　',result)

When running this program, the output is:

person　=　　{'name':　'Phill',　'age':　22}
result　=　　('salary',　3500.0)

If the dictionary is empty, popitem() will raise a KeyError error.

Dictionary methods in Python