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Home
Learn NetLogo
What is NetLogo? Tutorial #0 Sample Model Tutorial #1 Models Tutorial #2 Commands Tutorial #3 Procedures
Documentation
NetLogo Dictionary Interface Guide Interface Tab Guide Info Tab Guide Code Tab Guide Programming Guide Transition Guide Preferences Guide Version History
Advanced Tools
Extension Manager Shapes Editor BehaviorSpace System Dynamics HubNet HubNet Authoring Logging Controlling Mathematica Link NetLogo 3D Cluster Computing (HPC)
Extensions
Extensions Guide Arduino Array Bitmap CSV GIS GoGo LevelSpace Matrix Networks Palette Profiler Python Resource Rnd Sound Simple R Table Time Vid View2.5D
FAQ
primitive: py:set
Python Extension Dictionary
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py:set

py:set variable-name value

Sets a variable in the Python session with the given name to the given NetLogo value. NetLogo objects will be converted to Python objects as expected.

All vanilla NetLogo objects are supported, but objects from other extensions, even other bundled extensions, are not supported.

py:set "x" [1 2 3]
show py:runresult "x" ;; Shows [1 2 3]

Agents are converted into dictionaries with elements for each agent variable. Agentsets are converted into lists of agent dictionaries.

breed [goats goat]
goats-own
[energy ]
create-goats 1 [ set heading 0 set color 75 ]
ask goat 0 [ set energy 42 ]
py:set "goat" goat 0
py:runresult "str(goat)" ;; Should output: "{'WHO': 0, 'COLOR': 75, 'HEADING': 0, 'XCOR': 0, 'YCOR': 0, 'SHAPE': 'default', 'LABEL': '', 'LABEL-COLOR': 9.9, 'BREED': 'GOATS', 'HIDDEN?': False, 'SIZE': 1, 'PEN-SIZE': 1, 'PEN-MODE': 'up', 'ENERGY': 42}"

Agents with variables containing references to agentsets will have those variables converted into the string representation of that agentset.

Take me to the full Python Extension Dictionary.

Python Extension Dictionary: runresult

Documentation for the runresult primitive.

Python Extension Dictionary: setup

Documentation for the setup primitive.


NetLogo is a programmable modeling environment for simulating natural and social phenomena. It was authored by Uri Wilensky in 1999 and has been in continuous development ever since at the Center for Connected Learning and Computer-Based Modeling.

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Copyright © 1999-2025 Uri Wilensky and the Center for Connected Learning and Computer-Based Modeling at Northwestern University . All rights reserved.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License , or (at your option) any later version.

Commercial licenses are also available. To inquire about commercial licenses, please contact Uri Wilensky at netlogo-commercial-admin@ccl.northwestern.edu .

For more information, visit the NetLogo website .