AutoLISP is the 'Python' of AutoCAD APIs

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When it comes to scripting and automating tasks in AutoCAD, many users and developers immediately think of popular languages like Python. However, AutoCAD already possesses a powerful, built-in scripting language that has served its community well for decades: AutoLISP. While Python is often heralded for its simplicity and speed of development, AutoLISP shares much of the same strengths—and it has been an integral part of AutoCAD for far longer.


In this post, we’ll explore how AutoLISP has the potential to be AutoCAD’s equivalent to Python and why Autodesk could benefit immensely from giving it a modern revival.

 

Functional vs. Object-Oriented — The Core Strengths


On the surface, AutoLISP (a dialect of Lisp) differs from Python in that it is primarily a functional language rather than object-oriented. However, these differences do not detract from AutoLISP’s ability to handle complex operations, simplify repetitive tasks, and enable rapid prototyping:

1. Plain Text Files: Both languages can be written in simple, lightweight text files — .lsp for AutoLISP and .py for Python — making them easy to create, modify, and share.

2. Quick Execution: AutoLISP code runs directly within AutoCAD, allowing rapid testing and deployment. Similarly, Python scripts often enjoy fast iteration cycles, making them well suited for prototyping.

3. Rapid Development: AutoLISP’s straightforward syntax (once you get past the parentheses) allows users to automate tasks in minutes. The same is true for Python, whose human-readable syntax encourages quick coding and debugging.

 

Why AutoLISP Still Shines


Despite its long history, AutoLISP has not been actively developed for years. Many have overlooked its robust capabilities. But consider:

- A Mature Ecosystem: AutoLISP boasts decades of community-driven solutions, tutorials, and documentation. Numerous professionals have built careers on optimizing and automating AutoCAD with AutoLISP.

- Proven Track Record: Large-scale offices and small teams alike have relied on AutoLISP for everything from simple custom commands to elaborate design automation workflows.

- Extendable and Adaptable: If we look at what BricsCAD has done with Lisp — expanding it, speeding it up, and integrating it into modern workflows — there’s no reason Autodesk couldn’t follow a similar path. The language itself has proven nimble enough to adapt.

In short, AutoLISP has the core qualities that make Python such a popular choice for scripting and automation.

 

A Plea for Revival


AutoLISP’s “golden age” may feel like it was decades ago, but the language is far from obsolete. It has a strong user base and time-tested functions. All it needs is renewed attention from Autodesk. A few focused initiatives could elevate AutoLISP to modern standards:

1. Official Updates: Revisit the AutoLISP core for performance and functionality enhancements, much like other software have done with their embedded scripting languages.

2. Better Integration: Strengthen the integration between AutoLISP and newer AutoCAD functionalities (e.g., model-based design, networking, data extraction, cloud connectivity).

3. Active Support: Offer official training materials, webinars, and community spotlights to remind new and longtime users about the power at their fingertips.

Autodesk already has all the raw ingredients for success: a stable language, a knowledgeable user base, decades of documentation, and a proven track record. It would be a matter of making the commitment to reinvest and modernize AutoLISP.

 

The Bottom Line


AutoCAD doesn’t need Python because it already has its own “Python” in the form of AutoLISP. This functional, fast, and highly scriptable language has saved countless hours for drafters and engineers worldwide. It’s time to bring it back to the forefront by dedicating resources to updates, integration, and community support.

 

By doing so, Autodesk would not only preserve an important piece of AutoCAD’s heritage but also empower a new generation of designers, drafters, and programmers to innovate using a language built specifically for AutoCAD’s ecosystem. AutoLISP has all the potential it needs — it just requires a fresh infusion of attention to soar once again.

5 Comments
arshdeepsingh404
Collaborator

Great Post! @CodeDing 

I'm a huge fan of AutoLISP! It's amazing how powerful and flexible it is for automating tasks in AutoCAD. Every time I write a custom AutoLISP program for users in the forums, they love how much it simplifies their workflow. AutoLISP has been around for decades, and it still holds its ground as one of the best tools for customization. With the right approach, you can accomplish almost anything. A modern revival of AutoLISP would be incredible!

daniel_cadext
Advisor

AutoLISP is awesome!

-didier-
Advisor

Bonjour

 

I totally agree, at 120%. AutoLisp and especially since the VLAX functions allows doing absolutely everything that is imaginable in a user’s needs.
Since the year 90 I program with and I have not yet found the limits.
They exist, we agree, but with a little imagination they are circumvented by assuming that when the door is closed you can still enter through the window!

Right now I’m practicing on C#, hyper powerful and more, but it’s for large-scale projects.
Everyday life is Autolisp again and again.

 

Amicalement, depuis la France.

calderg1000
Mentor

Saludos @CodeDing 

De acuerdo contigo, veo que los programadores expertos en autolisp han ido bastante lejos con soluciones muy elaboradas para ACAD y de gran ayuda cotidiana. Pero si es posible una renovación potenciando mas aun Autolisp. Seria genial, particularmente me gustaría que fuera dinámico. Se que con Reactores se puede hacer algo de ello. Pero no veo mucho su utilización.

 

Eckrich_matthew
Explorer

@CodeDing

 

Thank you for your many contributions to AutoLISP developers of all skill levels across many forums. 

The AutoCAD built-in Visual LISP Integrated Development Environment (VLIDE) is a fantastic tool for AutoLISP development. Its features—like setting breakpoints, tracking variables, matching parentheses, and testing code variations—significantly help debugging and refining AutoLISP programs. 

AutoLISP has transformed our drafting group’s workflow by automating repetitive tasks and unlocking powerful AutoCAD features. Some key improvements we’ve implemented include:

  Enabled PDF text accessibility with TrueType fonts

  Seamless Excel data imports using AutoCAD tables

  Streamlined block attribute definitions

AutoLISP functions have significantly reduced effort for our drafters while boosting productivity. Keep up the great work.