# Proxy modified state is different in Python
**URL:** https://discourse.paraview.org/t/proxy-modified-state-is-different-in-python/17055
**Category:** Development
**Created:** [August 8, 2025, 2:53pm UTC](https://discourse.paraview.org/t/proxy-modified-state-is-different-in-python/17055 "2025-08-08T14:53:44Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@jeDuck](https://discourse.paraview.org/u/jeDuck)
#### Post date: [August 8, 2025, 2:53pm UTC](https://discourse.paraview.org/t/proxy-modified-state-is-different-in-python/17055/1 "2025-08-08T14:53:45Z")
Hello! When I open some model and create a filter on it (Clip, for example), the modified state on Clip proxy in pqFiltersMenuReaction is UNINITIALIZED. However, when I do the same in Python,
reader = OpenDataFile(‘myfile.pvd’)
filter = Clip(reader)
The modified state is UNMODIFIED. Is that an expected behaviour? Why is the state different in Python?
---
### Author:  [@ben.boeckel](https://discourse.paraview.org/u/ben.boeckel)
#### Post date: [August 8, 2025, 3:53pm UTC](https://discourse.paraview.org/t/proxy-modified-state-is-different-in-python/17055/2 "2025-08-08T15:53:24Z")
Is the `UNINITIALIZED` before you hit `Apply` in the UI? I suspect the API (C++ too) might be doing auto-Apply.
---
### Author:  [@jeDuck](https://discourse.paraview.org/u/jeDuck)
#### Post date: [August 8, 2025, 5:06pm UTC](https://discourse.paraview.org/t/proxy-modified-state-is-different-in-python/17055/3 "2025-08-08T17:06:08Z")
Yes, UNINITIALIZED is before hitting the Apply button. The auto-apply button is off, the request data method of the filter is not being called neither in paraview, nor in the python shell. I noticed that UNMODIFIED status is the default value in pqProxy constructor and the UNINITIALIZED status in Paraview is being set by pqObjectBuilder::create\_filter, however it doesn’t seem to get called via Python shell
---
### Author:  [@ben.boeckel](https://discourse.paraview.org/u/ben.boeckel)
#### Post date: [October 20, 2025, 11:20am UTC](https://discourse.paraview.org/t/proxy-modified-state-is-different-in-python/17055/4 "2025-10-20T11:20:59Z")
@cory.quammen ?
---
### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [October 20, 2025, 11:40am UTC](https://discourse.paraview.org/t/proxy-modified-state-is-different-in-python/17055/5 "2025-10-20T11:40:20Z")
FYI @nicolas.vuaille
---
### Author:  [@nicolas.vuaille](https://discourse.paraview.org/u/nicolas.vuaille)
#### Post date: [October 21, 2025, 7:06am UTC](https://discourse.paraview.org/t/proxy-modified-state-is-different-in-python/17055/6 "2025-10-21T07:06:27Z")
Indeed, from what I see the `modifiedState` is changed only when clicking on buttons (apply, reset, changing property value). But nothing connects Python to it. So I feel like it was designed only for GUI interactions.
Another way to see that:
- Source / Sphere
- Apply
- Turn on “advanced properties”
- Python Shell
- s=GetActiveSource()
- s.StartTheta = 90
`Start Theta` is up to date in the Properties panel but the Apply button is disabled and the View was not updated. So nothing says that a change is “pending”.
I think it is an issue. @jeDuck would you mind create a ticket here [https://gitlab.kitware.com/paraview/paraview/-/issues?sort=created\_date&state=opened&first\_page\_size=50](https://gitlab.kitware.com/paraview/paraview/-/issues?sort=created_date&state=opened&first_page_size=50) ?
---
### Author:  [@jeDuck](https://discourse.paraview.org/u/jeDuck)
#### Post date: [October 21, 2025, 12:25pm UTC](https://discourse.paraview.org/t/proxy-modified-state-is-different-in-python/17055/7 "2025-10-21T12:25:55Z")
Here is the ticket:
[https://gitlab.kitware.com/paraview/paraview/-/issues/23133](https://gitlab.kitware.com/paraview/paraview/-/issues/23133)