What are some advanced features of the Python collections module?

What are some advanced features of the Python collections module?

The Python collections module offers several advanced features like namedtuples, defaultdicts, and Counter. Would you like to explore any specific feature?

Can you explain how defaultdict works?

Sure! A defaultdict is a subclass of the built-in dict class. It overrides one method to provide a default value for a nonexistent key, which can be specified when you create the defaultdict.

How is it different from a regular dictionary?

The main difference is that with a regular dictionary, accessing a nonexistent key raises a KeyError, while a defaultdict automatically creates a new entry with a default value.

Can you give me an example of using Counter?

Absolutely! Counter is used to count hashable objects. For example, you can count the frequency of elements in a list: Counter(['a', 'b', 'a', 'c', 'b', 'a']) would return Counter({'a': 3, 'b': 2, 'c': 1}).