---
title: "system.dataset.toPyDataSet"
description: "This function converts from a normal DataSet to a PyDataSet, which is a wrapper class which makes working with datasets more Python-esque."
---

# system.dataset.toPyDataSet

> This function converts from a normal DataSet to a PyDataSet, which is a wrapper class which makes working with datasets more Python-esque.

This function is used in **Python Scripting**.

## Description

This function converts from a normal dataset to a PyDataset, which is a wrapper class which makes working with datasets more Python-esque. For more information on datasets and PyDatasets, see the Datasets page. 

## Client Permission Restrictions
This scripting function has no Client Permission restrictions.

## Syntax

`system.dataset.toPyDataSet(dataset)`

### Parameters
Type | Parameter | Description 
------- | ------- | ------- 
Dataset | `dataset` | A dataset object to convert into a PyDataset.

### Returns
**PyDataset** - The newly created PyDataset.

### Scope
Gateway, Vision Client, Perspective Session

## Code Examples

```python title="Code Snippet - Summing Values in a Column"
# This example script would be added to a button that is in the same container as the table you are working with. 
# It grabs the data of the Table component, and adds up the values in the first column, displaying the result to the user.
  
# Get a Table component's data.
table = event.source.parent.getComponent("Table")
data = system.dataset.toPyDataSet(table.data)
  
# Loop through the data, summing the Value column.
value = 0.0
for row in data:
   value += row[0]
  
# Show the user the sum of the Value column.
system.gui.messageBox("The value is: %f" % value)
```