io | Python Standard Library – Real Python
The Python io module provides tools for dealing with various types of input/output (I/O), including reading and writing files, handling binary data, and working with streams. It offers a consistent interface to different types of I/O operations and supports both text and binary data.
Here’s a quick example:
Key Features
- Provides base classes for file handling
- Supports both text and binary data I/O
- Allows creation of in-memory streams
- Offers high-level and low-level interfaces
Frequently Used Classes and Functions
| Object | Type | Description |
|---|---|---|
io.StringIO |
Class | Creates in-memory text streams |
io.BytesIO |
Class | Creates in-memory binary streams |
io.open() |
Function | Opens a file or returns a file object |
io.BufferedReader |
Class | Provides a buffered interface for reading binary streams |
io.BufferedWriter |
Class | Provides a buffered interface for writing binary streams |
Examples
Creating an in-memory text stream:
Working with binary data using BytesIO:
Common Use Cases
- Reading and writing to files with different text encodings
- Handling binary data streams in memory
- Implementing custom stream classes
- Performing I/O operations on network data
Real-World Example
Suppose you need to process text data from a file and remove certain words. You can use the io module to read from a file-like object and manipulate the text in memory before writing it back to a file.
In this example, the io module helped to handle text data in memory, process it to remove specific words, and write the filtered text back to a file efficiently.
Tutorial
Reading and Writing Files in Python (Guide)
In this tutorial, you'll learn about reading and writing files in Python. You'll cover everything from what a file is made up of to which libraries can help you along that way. You'll also take a look at some basic scenarios of file usage as well as some advanced techniques.
For additional information on related topics, take a look at the following resources: