---
title: "Python commands for use with Nexus"
canonical: "https://help.vicon.com/space/Nexus212/11242718/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 [Modeling with Python](https://vicon-help.atlassian.net/wiki/spaces/Nexus212/pages/11250006).

> ⚠️ **Important**  
> ⚠️ 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://577cdb08-ebe8-46d7-8ea2-9d570012a2d5)

> 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://249216d0-c847-4418-8cb5-6f950132a827)