Python 3 Integration for Ignition

Real Python 3 — requests, pandas, numpy, and the rest of PyPI — callable from any Ignition 8.3 gateway as if it were a native scripting library.

Repository: ignition-module-python3 | Module ID: com.gaskony.python3

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Why this exists

Ignition is built on Jython 2.7 and realistically always will be — but nearly every programmer today works in Python 3, and the packages that matter (requests, pandas, numpy, …) are Python 3 only. This module makes Python 3 feel like a native part of any Ignition 8.3 gateway: write and test a Python 3 script in a first-class editor, save it into a Project-Library-like tree, and call it from anywhere Jython runs — Perspective pages, tag scripts, gateway events — via system.python3.*.

The full purpose, definition of done, and permanent won't-do list live in docs/PROJECT_CHARTER.md — the charter drives every release decision.

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What it looks like

The browser-based IDE: real code, run against a real warm Python 3 process, with the script's own printed output shown inline. No Designer required.

Scripts are organised into folders and are real files on disk — select one to see its source, description and last-modified time.

Diagnostics: pool utilisation and the module's own log stream — including the per-call audit trail (mode, code hash, duration) — filterable by level.

Multiple Python versions can be installed side by side; scripts pick which one they run against.

The landing dashboard: module health, process pool and installed versions at a glance.

The Designer-scope Script Console: real Python 3 code, syntax-highlighted, run against the same warm process pool as the Web UI — connected, 3/3 workers available, Python 3.11.6.

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What it does

Feature	What it gives you
system.python3.* scripting functions	Call Python 3 from any Jython scope — Perspective bindings, tag events, gateway timers — via exec, eval, callScript, callModule
Gateway Web UI IDE	Browser-based editor with syntax highlighting, script folders, autocomplete and inline output — no Designer needed
Designer Script Console + Project Browser	A native Designer editor plus a "Python 3 Scripts" node in the project tree, for developers who live in the Designer
Process pool of warm subprocesses	3–20 pre-warmed Python interpreters (configurable) so exec calls skip process-start cost; health-checked every 30 s and self-recovers from a crashed worker
Multiple installable Python versions	3.9–3.13 installed side by side; each script picks which one it runs against
Package management	Search and install PyPI packages per Python version, from the gateway UI
REST API	POST /exec, /eval, /call-module; GET /version, /pool-stats, /health, /diagnostics — token-gated, HTTPS-required for admin mode
File-backed script library	Scripts are real .py files on disk (gateway-global, hot-reloaded on external edit), not an opaque blob
Live diagnostics	Pool utilisation, execution metrics and an auditable log of every call, in one view

See CHANGELOG.md for the full release history.

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How to use it

./gradlew clean build --no-daemon
# Install build/Python3-4.6.1.modl via Gateway > Config > System > Modules

Then, from any Jython scope (Script Console, a tag event, a Perspective binding):

result = system.python3.exec("import requests; result = requests.get('https://example.com').status_code")
print(result)  # 200

Or open the browser IDE at Config → Python 3 → IDE (/app/python3-ide on the gateway) to write, run and save scripts without touching a project. See docs/getting-started/QUICK_START.md and docs/getting-started/INSTALLATION.md for the full walkthrough.

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Documentation

• REST API: docs/api/REST_API.md
• Architecture: docs/architecture/OVERVIEW.md
• Security model: SECURITY.md
• Development guide: CLAUDE.md — for contributors
• Changelog: CHANGELOG.md — release history

For developers

# Build module
./gradlew clean build --no-daemon

# Test with Docker
docker-compose up -d
# Access at http://localhost:9088

• Version workflow: docs/development/VERSION_WORKFLOW.md
• Testing guide: docs/development/TESTING.md

External resources

• Official SDK docs: https://www.sdk-docs.inductiveautomation.com/
• SDK examples: https://github.com/inductiveautomation/ignition-sdk-examples
• Forum: https://forum.inductiveautomation.com/c/module-development/7
• Gradle plugin: https://github.com/inductiveautomation/ignition-module-tools

Credits

Python 3 Integration Module developed by Gaskony with assistance from Claude Code (Anthropic).

Built using the Ignition 8.3 SDK from Inductive Automation.

Licence

Apache License 2.0 — see LICENSE.