> For the complete documentation index, see [llms.txt](https://docs.ladybug.tools/dragonfly-primer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ladybug.tools/dragonfly-primer/components/3_energy/reassign_energy_properties.md).

# Reassign Energy Properties

![](/files/-Mihr_bhpDhF17xoGkUg)

![](/files/-Mihr_bkqKfmmlf3Q9B7) - [\[source code\]](https://github.com/ladybug-tools/dragonfly-grasshopper/blob/master/dragonfly_grasshopper/src//DF%20Reassign%20Energy%20Properties.py)

Re-assign energy properties to any Dragonfly object (Building, Story, Room2D, Model).

This is useful for editing auto-generated child objects separately from their parent. For example, if you want to assign all of the ground floors of a given auto-generated Building to have a Retail ProgramType, this can help re-assign a Retail ProgramType to such stories.

### Inputs

* **df\_obj \[Required]**

A Dragonfly Building, Story or Room2D which is to have its energy properties re-assigned. This can also be an entire Dragonfly Model.

* **program**

Text to reassign the program of the input objects (to be looked up in the ProgramType library) such as that output from the "HB List Programs" component. This can also be a custom ProgramType object.

* **constr\_set**

Text to reassign construction set of the input objects, which is usedto assign all default energy constructions needed to create an energy model. Text should refer to a ConstructionSet within the library such as that output from the "HB List Construction Sets" component. This can also be a custom ConstructionSet object.

### Outputs

* **df\_obj**

The input Dragonfly object with its properties re-assigned based on the input.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.ladybug.tools/dragonfly-primer/components/3_energy/reassign_energy_properties.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.