Implement HashMap in Python

[Coderx85]

Pull Request

Related issue

Fixes #2126

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##Description
HashMap Implementation in Python

The provided Python code defines a custom HashMap class, allowing for the storage and retrieval of key-value pairs. The HashMap is initialized with a user-specified size, defaulting to 10 buckets.

Key features of this implementation include:

Hashing Function: The _hash method employs the built-in hash function to compute a hash value for a given key. This ensures even distribution of keys across buckets.

Insertion of Key-Value Pairs: The insert method inserts a new key-value pair or updates the value of an existing key. It utilizes the hash value to determine the appropriate bucket, then iterates through the bucket to handle potential collisions.

Retrieval of Values: The get method retrieves the value associated with a given key. It uses the hash value to locate the correct bucket, then iterates through the bucket to find the matching key.

Key Removal: The remove method allows for the deletion of a key-value pair based on the provided key. It utilizes the hash value to locate the correct bucket and subsequently iterates through the bucket to find and remove the key.

Error Handling: The implementation raises a KeyError if an attempt is made to retrieve or remove a non-existent key.

This HashMap implementation is designed for basic use cases and serves as a starting point for more sophisticated applications. It provides a clear foundation for understanding the underlying principles of HashMap data structures.

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