Dictionary Operations
Explore Python dictionary operations to add, update, and delete entries, check key existence, copy contents between dictionaries, and create new dictionaries using comprehensions. Understand how to manage key-value pairs effectively and reinforce your skills with practical challenges.
Adding and updating entries
We can add new entries in a dictionary by simply assigning a value to a key. Python automatically creates the entry. If a value already exists at this key, it will be updated:
Removing entries
To delete an entry in a dictionary, we can use the del keyword, which removes the key-value pair permanently. After using del, the key will no longer exist in the dictionary, and trying to access it will result in a KeyError. Here’s an example:
If we want to use the deleted value, the ...