# Update ExtractSelection filter in python
**URL:** https://discourse.paraview.org/t/update-extractselection-filter-in-python/8279
**Category:** ParaView Support
**Tags:** python
**Created:** [October 28, 2021, 1:26pm UTC](https://discourse.paraview.org/t/update-extractselection-filter-in-python/8279 "2021-10-28T13:26:32Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Hugo](https://discourse.paraview.org/u/Hugo)
#### Post date: [October 28, 2021, 1:26pm UTC](https://discourse.paraview.org/t/update-extractselection-filter-in-python/8279/1 "2021-10-28T13:26:32Z")
Hello,
I’m trying to update an ExtractSelection filter in python but I can’t figure out how to make it work.
Here is an example of what I’m trying to do :
```auto
from paraview.simple import *
from paraview.selection import *
parent = GetActiveSource()
extract_sel = ExtractSelection(Input=parent)
ids = [0, 1, 2,]
selection = SelectGlobalIDs(IDs=ids, FieldType="CELL", ContainingCells=False,
Source=parent, Modifier=None)
extract_sel.Selection = selection
```
My selection is only taken into account if I give it at the initialization of ExtractSelection, but I want to be able to update an existing filter (it’s possible in the GUI).
Any help would be appriciated.
Thank you.
---
### Author:  [@Hugo](https://discourse.paraview.org/u/Hugo)
#### Post date: [October 28, 2021, 3:35pm UTC](https://discourse.paraview.org/t/update-extractselection-filter-in-python/8279/2 "2021-10-28T15:35:47Z")
I’ve understood a bit better what’s happening :
SelectGlobalIDs doesn’t return anything. I found this hidden function which actually returns something :
```auto
selection = _createSelection('GlobalIDSelectionSource', IDs=ids, FieldType="CELL",
ContainingCells=False,)
```
Now :
```python
extract_sel.Selection = selection
```
is updating the GUI widget :
But the filter remains empty :
