Categories
28°C, New York
Home Python When you should write Context Managers

When you should write Context Managers

Context Manager Syntax

Writing Context Manager

  • Releasing the Resources: Releasing the resources often ends up with boilerplate code. Using Context Managers, programmers can open the resource in the __enter__ method and close it in the __exit__ method and can reuse the functionality on demand.
  • Avoid Repetition: Exception Handling using except clause results in repetitive code. Using Context Manager, programmers can either raise or suppress the exception, and importantly it is defined in one place and hence can avoid repetition.

Reusable piece of python functionality for wrapping arbitrary blocks of code : Python Context Managers

Context Managers are the tools for wrapping around arbitrary (free-form) blocks of code. One of the primary reasons to use a context manager is resource cleanliness. Context Manager ensures that the process performs steadily upon entering and on exit, it releases the resource. Even when the wrapped code raises an exception, the context manager guarantees the exit. So, without any procrastination, lets dive and acquire the new mantra for resource cleanliness without the code repetition.

Context Managers

Note: Knowledge about Decorators and Generators is appreciated

Similar Reads

Context Manager Syntax

As we all know, the proper way to release the resource is by closing the resource after its use. And the most common practice followed to structure the close function is by using Exception Handling. Let’s look into the below code....

When you should write Context Managers

Releasing the Resources: Releasing the resources often ends up with boilerplate code. Using Context Managers, programmers can open the resource in the __enter__ method and close it in the __exit__ method and can reuse the functionality on demand. Avoid Repetition: Exception Handling using except clause results in repetitive code. Using Context Manager, programmers can either raise or suppress the exception, and importantly it is defined in one place and hence can avoid repetition....

Writing Context Manager

Knowing is not enough; we must apply. Willing is not enough; we must do. – Johann Wolfgang von Goethe...

Summary

Context managers ensure resources are released properly and the way it’s structured provides the flexibility of re-using the exception handling code at different places and hence avoid code repetition. Context managers are used for wrapping arbitrary blocks of code. However, a Context Manager can be used as a decorator, which avoids the need for writing a Context Manager and a Decorator separately for certain tasks....

Tags:
#Python #python

Context Manager Syntax

Writing Context Manager