What are some common dictionary methods?

In the world of Python programming, dictionaries are a fundamental data structure that every Python enthusiast should be well-versed in. Python dictionaries are versatile containers used to store and manipulate data. As an experienced Python Training tutor registered on UrbanPro.com, I am here to guide you through some of the common dictionary methods.

Common Dictionary Methods

Dictionaries offer several methods to work with key-value pairs, making them an essential tool in Python. Here are some common dictionary methods that you will learn in Python Training:

1. clear(): This method removes all key-value pairs from the dictionary, leaving it empty.

2. copy(): The copy() method creates a shallow copy of the dictionary, allowing you to work with a duplicate without altering the original dictionary.

3. get(key, default): Use this method to retrieve the value associated with a given key. If the key is not found, it returns the default value you provide.

4. items(): The items() method returns a view object that displays a list of a dictionary's key-value pairs as tuples.

5. keys(): This method returns a view object displaying all the keys within the dictionary.

6. values(): The values() method returns a view object showing all the values stored in the dictionary.

7. update(dictionary): The update() method merges two dictionaries. It adds key-value pairs from one dictionary to another or updates existing keys.

8. pop(key, default): When you need to remove and return the value of a specific key, you can use the pop() method. It also allows you to provide a default value if the key is not found.

9. popitem(): This method removes and returns an arbitrary (key, value) pair from the dictionary. It's useful for removing items when the order doesn't matter.

10. setdefault(key, default): If you want to add a new key with a default value if it doesn't exist, you can use the setdefault() method.

11. fromkeys(iterable, value): The fromkeys() method creates a new dictionary with keys from an iterable and sets all values to the specified value.

12. len(): Although not a method, the len() function helps determine the number of key-value pairs in a dictionary.

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