Context Managers and Python's with Statement

Leodanis Pozo RamosJune 2, 2021About 4 min

Context Managers and Python's with Statement 관련

In this step-by-step tutorial, you'll learn what the Python with statement is and how to use it with existing context managers. You'll also learn how to create your own context managers.

Watch Now

This tutorial has a related video course created by the Real Python team. Watch it together with the written tutorial to deepen your understanding:

[COURSE] Context Managers and Using Python's with Statement – Real Python

In this video course, you'll learn what the Python with statement is and how to use it with existing context managers. You'll also learn how to create your own context managers.

The with statement in Python is a quite useful tool for properly managing external resources in your programs. It allows you to take advantage of existing context managers to automatically handle the setup and teardown phases whenever you’re dealing with external resources or with operations that require those phases.

Besides, the context management protocol allows you to create your own context managers so you can customize the way you deal with system resources. So, what’s the with statement good for?

In this tutorial, you’ll learn

What the Python with statement is for and how to use it
What the context management protocol is
How to implement your own context managers

With this knowledge, you’ll write more expressive code and avoid resource leaks in your programs. The with statement helps you implement some common resource management patterns by abstracting their functionality and allowing them to be factored out and reused.

Quiz - Context Managers and Python's with Statement

Context Managers and Python's with Statement Quiz – Real Python

In this quiz, you'll assess your understanding of the Python with statement and context managers. By mastering these concepts, you'll be able to write more expressive code and manage system resources more effectively, avoiding resource leaks and ensuring proper setup and teardown of external resources.

Managing Resources in Python

(1/9) Context Managers and Python's with Statement

Using the Python with Statement

(2/9) Context Managers and Python's with Statement

Summarizing the with Statement’s Advantages

(3/9) Context Managers and Python's with Statement

Using the async with Statement

(4/9) Context Managers and Python's with Statement

Creating Custom Context Managers

(5/9) Context Managers and Python's with Statement

Coding Class-Based Context Managers

(6/9) Context Managers and Python's with Statement

Creating Function-Based Context Managers

(7/9) Context Managers and Python's with Statement

Writing Good APIs With Context Managers

(8/9) Context Managers and Python's with Statement

Creating an Asynchronous Context Manager

(9/9) Context Managers and Python's with Statement

Conclusion

The Python with statement is a powerful tool when it comes to managing external resources in your programs. Its use cases, however, aren’t limited to resource management. You can use the with statement along with existing and custom context managers to handle the setup and teardown phases of a given process or operation.

The underlying context management protocol allows you to create custom context managers and factor out the setup and teardown logic so you can reuse them in your code.

In this tutorial, you learned:

What the Python with statement is for and how to use it
What the context management protocol is
How to implement your own context managers

With this knowledge, you’ll write safe, concise, and expressive code. You’ll also avoid resource leaks in your programs.

Quiz - Context Managers and Python's with Statement

Context Managers and Python's with Statement Quiz – Real Python

Watch Now

This tutorial has a related video course created by the Real Python team. Watch it together with the written tutorial to deepen your understanding:

[COURSE] Context Managers and Using Python's with Statement – Real Python

In this video course, you'll learn what the Python with statement is and how to use it with existing context managers. You'll also learn how to create your own context managers.

Context Managers and Python's with Statement

In this step-by-step tutorial, you'll learn what the Python with statement is and how to use it with existing context managers. You'll also learn how to create your own context managers.