# \[BUG\] Perspective Table props.data item key values are BasicQualifiedValues and ImmutableQualifiedValues in script **URL:** \ **Category:** Ignition\ **Tags:** perspective\ **Created:** [February 3, 2023, 2:07am UTC](https://forum.inductiveautomation.com/t/bug-perspective-table-props-data-item-key-values-are-basicqualifiedvalues-and-immutablequalifiedvalues-in-script/69379 "2023-02-03T02:07:49Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![nminchin](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nminchin/32/6911_2.png) [@nminchin](https://forum.inductiveautomation.com/u/nminchin)\ **Post date:** [February 3, 2023, 2:07am UTC](https://forum.inductiveautomation.com/t/bug-perspective-table-props-data-item-key-values-are-basicqualifiedvalues-and-immutablequalifiedvalues-in-script/69379/1 "2023-02-03T02:07:49Z")
v8.1.24 This was a bug in earlier versions I remember for some things but I thought it was fixed. When referring to `.props.data` in script which is a list of objects, the object key values are read in as ImmutableQualifiedValues instead of as basic data types. This makes manipulating it hard.. I just want to write to some of the item key values, but I get immutable errors: `TypeError: 'com.inductiveautomation.perspective.common.ImmutableQualifiedValue' object does not support item assignment` If I print the type and value of props.data[0] for example, I get this: ```auto 13:30:48.108 [Browser Thread: 54902] INFO Perspective.Designer.Workspace - class com.inductiveautomation.perspective.common.ImmutableQualifiedValue 13:30:48.110 [Browser Thread: 54902] INFO Perspective.Designer.Workspace - QV[{part_length=[2600, Good_Unspecified, Fri Feb 03 13:26:32 ACDT 2023 (1675392992119)], select=[false, Good_Unspecified, Fri Feb 03 13:26:32 ACDT 2023 (1675392992119)], job_name=[310822-WGND-001, Good_Unspecified, Fri ``` I'm actually struggling to convert this to something I can actually use ☹ ---
**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\ **Post date:** [February 3, 2023, 5:22pm UTC](https://forum.inductiveautomation.com/t/bug-perspective-table-props-data-item-key-values-are-basicqualifiedvalues-and-immutablequalifiedvalues-in-script/69379/2 "2023-02-03T17:22:23Z")
Hmm. What's the source of the data in the table? When I do it off the basic data in the table, I get the 'object wrapper' I would expect; that is: `system.perspective.print(self.getSibling("Table").props.data[0])` outputs: `09:20:17.872 [Browser Thread: a09cdd3b-7f7d-48ec-bb06-ec6c75d65555] INFO Perspective.Designer.Workspace - : {u'country': u'United States', u'city': {u'editable': True, u'justify': u'left', u'style': {u'backgroundColor': u'#F7901D', u'classes': u'some-class'}, u'align': u'center', u'value': u'Folsom'}, u'population': 77271L}` So what might be happening is that _a specific binding or script source_ is putting the data onto the table in an odd way? ---
**Author:** ![nminchin](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nminchin/32/6911_2.png) [@nminchin](https://forum.inductiveautomation.com/u/nminchin)\ **Post date:** [February 3, 2023, 11:09pm UTC](https://forum.inductiveautomation.com/t/bug-perspective-table-props-data-item-key-values-are-basicqualifiedvalues-and-immutablequalifiedvalues-in-script/69379/3 "2023-02-03T23:09:32Z")
Hmm, interesting, I'll have a look! ---
**Author:** ![nminchin](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nminchin/32/6911_2.png) [@nminchin](https://forum.inductiveautomation.com/u/nminchin)\ **Post date:** [February 3, 2023, 11:39pm UTC](https://forum.inductiveautomation.com/t/bug-perspective-table-props-data-item-key-values-are-basicqualifiedvalues-and-immutablequalifiedvalues-in-script/69379/4 "2023-02-03T23:39:52Z")
Don't have much time, but this is what populates it: ```auto try: job_name = payload['job_name'] job_parts = payload['job_parts'] items = [] items.extend([{'job_name': job_name, 'job_part': job_part['part_name'], 'job_part_operation_csv': job_part['operation_csv'], 'part_type': job_part['part_type'], 'part_length': job_part['part_length'], 'select': False, 'row': row, 'last_run_on': job_part['last_run_on'] } for row, job_part in enumerate(job_parts)]) self.props.data = items self.parent.custom.selectedJobName = job_name except: shared.fe.perspective.error.displayError() ``` ---
**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\ **Post date:** [February 4, 2023, 12:47am UTC](https://forum.inductiveautomation.com/t/bug-perspective-table-props-data-item-key-values-are-basicqualifiedvalues-and-immutablequalifiedvalues-in-script/69379/5 "2023-02-04T00:47:35Z")
I dunno. I set up a message handler and a direct script and tried to populate a table with similar data, but both worked and gave me objectwrappers in the output. I thought it might be something with deeply-nested object references or something also, but I didn't have any luck. If you can provide an SSCCE here or to support, it'd be great. ---
**Author:** ![ccontreras](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/ccontreras/32/40931_2.png) [@ccontreras](https://forum.inductiveautomation.com/u/ccontreras)\ **Post date:** [August 8, 2025, 9:42pm UTC](https://forum.inductiveautomation.com/t/bug-perspective-table-props-data-item-key-values-are-basicqualifiedvalues-and-immutablequalifiedvalues-in-script/69379/6 "2025-08-08T21:42:26Z")
If I understand this correctly, this will help you get the values out of prevValue and currentValue. Unfortunately, looping through it will have awkward syntax: ```python system.perspective.print(previousValue.value[0].value["newColumn"].value) system.perspective.print(type(previousValue.value[0])) prevValue = previousValue.value currValue = currentValue.value changedCols = [] for rowIndex in range(len(prevValue)): for key in prevValue[rowIndex].value.keys(): system.perspective.print(previousValue.value[rowIndex].value[key].value) ```