Python ContextManager like for function alias

Title: Creating a Python ContextManager-like Function Alias
Introduction:
In Python, context managers are a powerful tool for resource management and ensuring that resources are acquired and released correctly. However, you can also create a custom context manager-like functionality for function aliases to enhance your code's readability and maintainability. This tutorial will guide you through the process of creating a Python context manager-like function alias with code examples.
Prerequisites:
To follow along with this tutorial, you should have a basic understanding of Python and how functions work.
Creating a Function Alias:
A function alias, in this context, is a way to provide a cleaner and more descriptive name for an existing function. It can be particularly useful when working with libraries or modules that have long or cryptic function names. Here's a step-by-step guide to creating a function alias:
Step 1: Define the Original Function:
Let's start by defining a simple function that we want to create an alias for. In this example, we'll use a function called calculate_total:
Step 2: Create a Function Alias:
To create an alias for the calculate_total function, we'll define a new function with a more descriptive name. In this case, let's call it compute_invoice_total:
Now, you can use compute_invoice_total as an alias for calculate_total, making your code more readable and self-explanatory.
Step 3: Using the Function Alias:
You can use compute_invoice_total just like any other function, and it will invoke the original calculate_total function:
Output:
The alias compute_invoice_total acts as a convenient and descriptive name for the underlying function.
Context Manager-Like Approach:
You can take the concept of function aliasing a step further by creating a context manager-like approach. This can be useful when you want to perform setup and teardown actions around the original function call. Here's how you can do it:
Step 1: Define a Context Manager-like Function Alias:
In the code above, we use the contextmanager decorator from the contextlib module to create a context manager-like function alias called invoice_total_context. The yield statement represents the point where the original function is invoked.
Step 2: Using the Context Manager-Like Alias:
You can use the invoice_total_context in a with statement to define setup and teardown actions around the calculation:
Output:
In this example, you have control over the setup and teardown actions, mak