There are several excellent Integrated Development Environments (IDEs) to choose from when it comes to coding and programming in Python on Ubuntu Linux. Here are six of the best Python IDEs available:

PyCharm: Developed by JetBrains, PyCharm is popular among Python developers. It offers advanced features like code completion, debugging tools, version control integration, and support for web development frameworks.

Visual Studio Code: Although not exclusively a Python IDE, Visual Studio Code (VS Code) has a rich ecosystem of extensions, making it a powerful programming with python environment. It provides syntax highlighting, IntelliSense, debugging capabilities, and source control integration.

Sublime Text: Known for its speed and simplicity, Sublime Text is a lightweight yet powerful text editor. It offers a customizable interface, multiple selections, and a wide range of plugins to enhance Python development.

Atom: Atom is an open-source text editor with a strong community following. It provides a modern and customizable interface, a built-in package manager, and various Python-related packages to enhance your coding experience.

Spyder: Spyder is a scientific Python development environment that combines an IDE with powerful scientific libraries like NumPy, SciPy, and Matplotlib. It features an interactive console, variable explorer, and debugging capabilities.

PyDev: Built as an Eclipse plugin, PyDev provides a feature-rich Python IDE with code completion, debugging, and code analysis tools. It integrates well with other Eclipse plugins and supports web development frameworks like Django.

These Python IDEs offer different features and workflows, so it's worth trying a few to find the one that best suits your needs and preferences. Remember that personal preference plays a significant role in choosing an IDE, so explore each option to see which one aligns with your coding style and requirements.