Adventures in Machine Learning

Mastering Python’s Powerful @ Symbol: Decorators and Matrix Multiplication

The “@” symbol is a widely used operator in Python programming that has different uses, from decorating functions to matrix multiplication. It is a unique symbol that is recognizable to many Python programmers, and it has proven to be a powerful tool to make Python code more readable and maintainable.

Uses of “@” Symbol in Python

Use as a decorator

A decorator in Python is a function that takes another function and extends the behavior of that function without modifying its source code. It is a fundamental tool in Python that allows programmers to add new functionality to existing code without changing it.

The “@” symbol is used to decorate a function in Python. It is placed before the function definition to indicate that the following function is decorated.

The decorator function is then called before the decorated function is executed. The decorator function can modify the behavior of the decorated function, add new functionality, or perform any other operation.

Decorators are used extensively in Python for various purposes, such as timing, debugging, and logging. They are also used to validate inputs and outputs and to enforce security policies.

Use for matrix multiplication

Besides functioning as a decorator, the “@” symbol is also used in Python as an operator for matrix multiplication. The multiplication operator “*” can also be used for matrix multiplication but can lead to confusion with standard multiplication.

For instance, in matrix multiplication, it is essential to keep track of the order of the operands to obtain the correct result. The “@” operator is used to perform matrix multiplication in Python and, as such, is more readable and less prone to error than the standard multiplication operator.

This operator is widely used in scientific applications that involve matrices.

Decorator in Python

Understanding decorator

Decorators are functions that wrap around other functions or classes to add new behavior or modify existing behavior. They improve code readability, reduce code duplication, and enable code reuse.

Python decorators work by taking a function as input, modifying it in some way, and then returning the modified function. The decorated function is then available for use, with its new behavior.

Use of “@” for decorating in Python

Python’s decorator syntax uses the “@” symbol followed by the name of the decorator function. The decorator function must be defined before it can be used to decorate other functions.

The “@” symbol gives a clear indication of where the decorator is being applied, making the code more readable. It also makes it easy to identify all the decorators applied to a particular function.

The use of “@” for decorators in Python can help avoid typos that might occur with other symbols and provides an easy-to-remember syntax that is easy to use.


In Python, the “@” symbol is a powerful tool used for decorating functions and performing matrix multiplication. Decorators improve code functionality and readability, while the “@” symbol makes the code more legible and easy to use.

In addition, the clear and concise syntax makes it easy to identify decorators and avoid confusion. These features make the “@” symbol a must-use in any serious Python programming project.

Types of Decorators in Python

Decorators are a powerful feature in Python that extends the functionality of functions and classes without changing their source code. In Python, there are several types of decorators available, each with a specific purpose.

Let us explore three popular types of decorators. @property decorator

In Python, the “@property” decorator is used to convert a method into a read-only attribute.

It provides a simple and elegant way to access and modify the values of class attributes. The “@property” decorator works by converting a method into a class instance attribute.

When accessed, the decorated method is called automatically by the Python interpreter, and the return value is returned as the attribute’s value. Properties are used to encapsulate functionality and hide implementation details, making it easier to maintain and debug code.

They provide an abstraction of data, which can simplify code for better understanding and increased readability. @classmethod decorator

The “@classmethod” decorator is used to declare a method in a class as a class method instead of an instance method.

A class method can be called without creating an instance of the class and can access the class variables. When a class method is called, the method is bound to the class and not to the class instance.

It enables developers to access methods and attributes of the class without creating an instance of the class. Class methods are used in cases where you need to modify a class’s behavior globally or work with class-level data.

They provide a way to create methods that return instances of a class or set up attributes or variables available on the class. @staticmethod decorator

The “@staticmethod” decorator allows a method to be called without the need for an instance of a class.

It is similar to a class method but does not operate on the class instance. When called, a static method is executed like a regular function.

It is not bound to the class or an instance of the class. This attribute is useful when processing data that does not require access to instance data.

Static methods are used to create functions that belong to a class but do not depend on the instance. They are commonly used to share code between instances or to implement utility functions that are not related to either the class or its instance.

Use of “@” for Matrix Multiplication

Understanding Matrix Multiplication

Matrix multiplication is a core concept of linear algebra that deals with multiplying matrices of different dimensions. In Python, matrix multiplication was introduced with the “@” symbol in version 3.5.

Matrix multiplication is used in mathematical modeling, data processing, financial analysis, and many other applications.

It is essential in machine learning algorithms and neural networks where matrices are used extensively to represent data and perform calculations. Implementation of “@” for Matrix Multiplication

Python’s “@” symbol is used to implement matrix multiplication in Python.

The symbol is an infix operator, and it takes two operands, the left and right matrices. The “__matmul__” method is used to implement this operator in Python.

This method is called when the “@” symbol is used to multiply two matrices and is defined as a magic method in Python. The “__matmul__” method is implemented on user-defined classes’ instances, making it possible to use the “@” symbol for matrix multiplication on custom objects.

This allows developers to customize the behavior of the operator to work with any object that they define.


Understanding the different types of decorators available in Python is an essential aspect of writing straightforward and concise code. The “@property,” “@classmethod,” and “@staticmethod” decorators each have distinct features and can be used in differing situations depending on the functionality required.

Additionally, Python’s “@” symbol is a powerful operator that has been used to implement matrix multiplication since Python 3.5. Using this operator, developers can simplify calculations that involve matrices, making the code more readable and maintainable.

Recap of the Main Topics

In this article, we have discussed some of the uses of the “@” symbol in Python programming. We started by exploring how the “@ symbol” is used in Python’s decorators to extend the functionality of functions and classes without changing their source code.

We also looked at how this symbol is used for matrix multiplication. Next, we delved into detail regarding the different types of decorators that are available in Python.

The “@property” decorator is used to convert a method into a read-only attribute. The “@classmethod” decorator is used to declare a method as a class method instead of an instance method.

Finally, the “@staticmethod” decorator allows a method to be called without the need for an instance of a class. Lastly, we explored matrix multiplication, a fundamental concept of linear algebra that has numerous applications but can be complicated to perform.

However, the “@” operator introduced in Python 3.5 simplifies the process, allowing developers to work with matrices effortlessly.


The Python programming language is a versatile language that offers many robust features for developers. The “@” symbol is one of the most valuable tools that Python has to offer, and it has many unique applications in various programming scenarios.

As we have seen in this article, “@ symbol” usage is prevalent both in Python decorators and for matrix multiplication. Decorators extend the functionality of functions and classes, making code more readable and maintainable.

Matrix multiplication with “@” simplifies calculations that involve matrices, making the code more concise and more straightforward for both programmers and users. Furthermore, the understanding of Python decorators and matrix multiplication is vital as they allow for a more efficient and effective approach to coding.

Developers can leverage the power of these features to write clear, concise, and functional code. In conclusion, Python’s “@” symbol and its various applications are an essential aspect of any Python programmer’s skill set.

For those seeking to become proficient in Python, exploring courses and materials on how to optimize the usage of these tools is a recommended way of mastering the language and delivering exceptional programs. In conclusion, Python’s “@” symbol is a powerful tool with numerous applications in programming.

We have explored how it is used in Python decorators to extend the functionality of functions and classes, as well as its use for matrix multiplication. The “@property,” “@classmethod,” and “@staticmethod” decorators each have unique features appropriate in varying programming situations.

Matrix multiplication, through the use of the “@” operator, simplifies the process and allows for clear, concise code. It is important for both new and seasoned programmers to understand and utilize these features to write efficient and effective code.

Courses and materials focused on these tools can help those interested in mastering Python programming, leaving them well-equipped to meet software demands.