How to Install Loguru in Python

Loguru is a popular logging library for Python. It simplifies logging with a clean API. This guide will show you how to install and use it.

What Is Loguru?

Loguru is an easy-to-use logging library. It requires minimal setup. It also provides powerful features like file rotation and colorized logs.

Prerequisites

Before installing Loguru, ensure you have Python installed. You can check by running python --version in your terminal.

 
python --version

Python 3.9.0

If you get a ModuleNotFoundError, check our guide on solving Python module errors.

Install Loguru Using pip

The easiest way to install Loguru is via pip. Run the following command in your terminal.

 
pip install loguru

This will download and install the latest version. Wait for the installation to complete.

Verify Installation

After installation, verify it works. Open a Python shell and import Loguru.

 
from loguru import logger
logger.success("Loguru installed successfully!")

2023-10-01 12:00:00 | SUCCESS | Loguru installed successfully!

If you see a success message, Loguru is ready to use.

Basic Loguru Usage

Loguru makes logging simple. Here’s a basic example to log messages.

 
from loguru import logger

logger.debug("This is a debug message")
logger.info("This is an info message")
logger.warning("This is a warning")
logger.error("This is an error")

2023-10-01 12:00:01 | DEBUG | This is a debug message
2023-10-01 12:00:01 | INFO | This is an info message
2023-10-01 12:00:01 | WARNING | This is a warning
2023-10-01 12:00:01 | ERROR | This is an error

Configure Loguru Output

You can customize where logs go. For example, save logs to a file.

 
from loguru import logger

logger.add("app.log")  # Logs will be saved to app.log
logger.info("This will be saved to the file")

Loguru also supports rotation and retention. This keeps log files manageable.

Conclusion

Loguru is a powerful yet simple logging tool for Python. It’s easy to install and use. Follow this guide to get started quickly.

For more advanced features, check the official Loguru documentation.