defaultdict tutorial hackerrank solution python
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Title: Python defaultdict Tutorial with HackerRank Solution
Introduction:
Python's defaultdict is a powerful tool provided by the collections module that extends the functionality of the built-in dict class. It is particularly useful when dealing with dictionaries and allows you to specify a default value for a key that does not exist. This tutorial will cover the basics of defaultdict and provide a solution to a common HackerRank problem using this data structure.
A defaultdict is a subclass of the built-in dict class in Python. It overrides one method to provide a default value for a nonexistent key. This is especially handy when working with counters, frequency dictionaries, and situations where you want to avoid KeyError when accessing keys that are not present.
Given a list of words, your task is to find the number of occurrences of each word in the list. You need to print the total number of distinct words and their respective counts.
In this tutorial, we covered the basics of the defaultdict in Python and applied it to solve a common problem on HackerRank. The defaultdict is a handy tool for simplifying code and avoiding KeyError issues when working with dictionaries.
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