2-Minute Guide: Context Managers in Python (2026)

2-Minute Guide: Context Managers in Python

Context managers in Python are a powerful tool for managing resources, such as files, connections, or locks. They ensure that resources are properly cleaned up after use, regardless of whether an exception is thrown or not.

Using with open()

One of the most common uses of context managers is when working with files. The with open() statement is a context manager that automatically closes the file when you're done with it:

with open('example.txt', 'r') as file:
    contents = file.read()

This ensures that the file is properly closed, even if an exception is thrown while reading it.

Creating a Custom Context Manager

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