Implementing an Immutable Dictionary

# Introduction

In this project, you will learn how to implement an immutable dictionary in Python. An immutable dictionary is a data structure that cannot be modified after it is created, which is useful in certain applications where the data needs to remain unchanged.

## 👀 Preview

d["Connection"]='kee-alive'
d["Host"]='www.labex.io'
TypeError("'ImmutableDict' objects are immutable")
TypeError("'ImmutableDict' objects are immutable")
d.get("Host")='www.labex.io'

## 🎯 Tasks

In this project, you will learn:

- How to create an `ImmutableDict` class that inherits from the built-in `dict` class
- How to implement methods in the `ImmutableDict` class to prevent modifications to the dictionary
- How to test the `ImmutableDict` class to ensure it behaves as expected

## 🏆 Achievements

After completing this project, you will be able to:

- Understand the concept of immutable data structures and their use cases
- Implement an immutable dictionary in Python using the `ImmutableDict` class
- Prevent modifications to the dictionary by overriding the appropriate methods
- Test the `ImmutableDict` class to ensure it works as expected