---
title: "Python commands for use with Nexus"
canonical: "https://help.vicon.com/space/Nexus219/673090032/Python%20commands%20for%20use%20with%20Nexus"
format: markdown
---
The following information is provided to help you to get started using Python for modeling with Nexus.

Before you begin, ensure you have launched and configured Python as described in [Set up Python for use with Nexus](https://vicon-help.atlassian.net/wiki/spaces/Nexus219/pages/673090007).

> ✅ **Tip**   
> ✅ Remember to import the module first:   
> ✅ `import ViconNexus`

## Display all Nexus Python SDK commands

At the Python command prompt, assuming you have completed the above preparatory step, enter:

`dir(ViconNexus.ViconNexus)`

A list of all Nexus Python SDK commands is displayed:

> ![image](media://113f64c1-5826-48b8-91cb-dc6f0a89a051)

> Macro (scroll-pagebreak)

## Display help on a command

To display help on one of the commands listed above:

At the Python command prompt, enter:

`help(commandName)`

Where *commandName* is the command for which you want to display help.

For example, to display help about **GetTrajectory**, enter:

`help(ViconNexus.ViconNexus.GetTrajectory)`

> ![image](media://662297af-b50d-4cdc-b816-9811d473cb96)