Ptpython is a feature-rich and user-friendly Python REPL (Read-Eval-Print Loop) that takes your interactive Python coding experience to a whole new level. Unlike the standard Python REPL, ptpython offers a host of powerful features designed to boost productivity and streamline the development process. Its intuitive interface, syntax highlighting, and robust auto-completion capabilities make writing and exploring Python code a breeze.
The interactive shell also provides the built-in ability to inspect Python objects, so you can quickly look up function references and module documentation without leaving the REPL environment. Whether you’re a beginner or an experienced Python programmer, ptpython’s interactive shell and multiline editing support will help you produce quality code.
In this tutorial, you’ll learn how to:
- Install and launch ptpython
- Initiate basic commands to enhance your coding experience
- Use typing completion and code auto-suggestion in your interactive shell
- Take advantage of input validation and error handling
- Customize the interactive experience to your liking
Once you have a better understanding of the advantages of using this enhanced Python shell, you’ll be on your way to creating a unique shell experience while elevating your Python coding workflow in an interactive environment.
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Installing and Launching Ptpython
It’s time to install ptpython in your machine. First, ensure that you have Python installed in your machine. Then, head over to your command line and install ptpython using the pip command. If you want to isolate the ptpython intallation, then you can use a virtual environment. Otherwise, you can install it universally, as you’ll see in this tutorial:
PS> python -m pip install ptpython
By hitting the Enter key, you download the library and make it available on your machine. To confirm that the library has been installed, you’ll launch the shell in the next step.
You’re now ready to explore your newly installed tool, which is a feature-rich Python REPL. But first, you have to launch it. While you’re still in your command prompt, enter the following command:
PS> ptpython
You only need this command to launch an interactive session. A new session will begin with the >>> prompt, signaling that the interactive shell is ready to accept your code. Your interface should look something like this:
Despite sharing a lot of similarities with the Python shell, the ptpython interface adds several interesting features. For example, at the bottom of the shell window, you’ll see a menu shortcut. The menu shortcut gives you a glimpse of what you can do within the interactive shell. In later sections, you’ll get to know how the menu system is the control center of ptpython.
Note: The pt part of ptpython refers to Prompt Toolkit which is a library for building interactive command line applications that ptpyton uses under the hood.
If you want to go back to the command line, then you’ll have to exit the interactive shell. There are other shortcuts that you can use to exit ptpython, but for now, you’ll use the exit() command:
>>> exit()
The exit() command is the same command that you’d find in the standard Python shell. Once you enter this command in the prompt, you’ll return to the regular command line.
In the next section, you’ll come to understand the intricacies that make ptpython an attractive alternative to the standard Python shell.
Comparing the Standard Python Shell vs Ptpython
The standard Python shell offers a way to interact with Python on your computer without using a code editor or an IDE. However, it can be a rigid tool to work with for beginners. Alternatives like IPython, bpython, and ptpython offer more functionality in the interactive shell.
With ptpython, you can gain an advantage over the standard shell by utilizing the following functionalities, which can power up your coding experience:
- Code and syntax highlighting, a functionality that you won’t find in the Python shell
- Completion capabilities that go way beyond the Python standard shell’s tab completion and reduce errors in your coding sessions
- Input validation to alert you when you’re about to execute erroneous code, in contrast to the Python standard shell’s executing and returning an error
- A powerful menu that allows you to access other functionalities
- The ability to seamlessly customize the ptpython interface by changing code color and shell behavior
These differences make ptpython a suitable alternative if you want to have a richer and more interactive experience as you code. This powerful interactive shell offers more tools, as you’ll learn in the next section.
Using Ptpython: The First Steps
Even though ptpython aims to make coding a breeze, you’ll have to learn the basic commands that you’ll frequently use in the interactive shell. By default, the shell behaves like any other shell when executing code. However, the combination of its menu system and its configuration file make it even more powerful. Getting a good grip on the menu system will allow you to command the shell’s behavior and appearance to fit your preferences.
Understanding the Menu System
Ptpython’s menu system enhances the interactive Python programming experience by providing a structured and navigable interface within the terminal. It offers an organized menu containing various options, including code history, command manipulation, and configurable settings.
The menu allows you to efficiently explore and access these features, improving your workflow and facilitating quick access to essential functionalities while working within the ptpython environment:
When you open the menu by typing F2, a variety of options will appear on the right side of your terminal, allowing you to manipulate how the REPL will behave.
Note: You use function keys like F2, F3, and