# Assigning Filters with ScheduleView.AddFilters node by using two Lists **URL:** \ **Category:** Revit\ **Tags:** python, dynamo\ **Created:** [November 30, 2021, 3:51pm UTC](https://forum.dynamobim.com/t/assigning-filters-with-scheduleview-addfilters-node-by-using-two-lists/70904 "2021-11-30T15:51:55Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![StephenDini](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/stephendini/32/127724_2.png) [@StephenDini](https://forum.dynamobim.com/u/StephenDini)\ **Post date:** [November 30, 2021, 3:51pm UTC](https://forum.dynamobim.com/t/assigning-filters-with-scheduleview-addfilters-node-by-using-two-lists/70904/1 "2021-11-30T15:51:55Z")
I have two lists being passed along into ScheduleView.AddFilters, one contains a list of ScheduleViews and the other a list of ScheduleFilters. My current issue is I am getting a warning as if I am trying to add over 8 filters to one schedule, where instead, I am trying to assign one per schedule. If I send over the list of ScheduleViews and **one** ScheduleFilter it works but assigns the wrong filter of coarse. I do not know if this is the reason but why is the list of ScheduleViews spaced differently to the list of ScheduleFilters? Should I nix the Node and create a python script node to assign the filters? Am I using the ScheduleView.AddFilters Node incorrectly? ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/3/2/32c61e49f9550da5955962cd8062d6f75b574a0e.png) Thank you for your time. ---
**Author:** ![staylor](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/staylor/32/94307_2.png) [@staylor](https://forum.dynamobim.com/u/staylor)\ **Post date:** [November 30, 2021, 9:03pm UTC](https://forum.dynamobim.com/t/assigning-filters-with-scheduleview-addfilters-node-by-using-two-lists/70904/2 "2021-11-30T21:03:45Z")
As long as you have the same number of schedules to filters, you could try setting the lacing to longest and see if that works. ---
**Author:** ![staylor](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/staylor/32/94307_2.png) [@staylor](https://forum.dynamobim.com/u/staylor)\ **Post date:** [November 30, 2021, 9:04pm UTC](https://forum.dynamobim.com/t/assigning-filters-with-scheduleview-addfilters-node-by-using-two-lists/70904/3 "2021-11-30T21:04:36Z")
BTW…welcome to the community! ---
**Author:** ![StephenDini](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/stephendini/32/127724_2.png) [@StephenDini](https://forum.dynamobim.com/u/StephenDini)\ **Post date:** [November 30, 2021, 9:52pm UTC](https://forum.dynamobim.com/t/assigning-filters-with-scheduleview-addfilters-node-by-using-two-lists/70904/4 "2021-11-30T21:52:22Z")
Thank you! ---
**Author:** ![StephenDini](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/stephendini/32/127724_2.png) [@StephenDini](https://forum.dynamobim.com/u/StephenDini)\ **Post date:** [November 30, 2021, 10:04pm UTC](https://forum.dynamobim.com/t/assigning-filters-with-scheduleview-addfilters-node-by-using-two-lists/70904/5 "2021-11-30T22:04:37Z")
I learned about Lacing after I had noticed that this was the cause of a few issues others had but sadly in my cause, none of the Lacing options worked. I did fix the issue using python but that also had its own weird issues. I figured I could create a new filter and assign the filter within the same for loop but it was adding every filter I created to each schedule I created. In order to get the python method to work I had to use a for loop and zip the scheduled and filters, which does what I thought my original idea would do. I suspect that there was some issues with the data not being overwritten correctly but I did try to Dispose the data without success. ```auto # Enable Python support and load DesignScript library import clr clr.AddReference('ProtoGeometry') from Autodesk.DesignScript.Geometry import * # Import RevitAPI clr.AddReference("RevitAPI") import Autodesk from Autodesk.Revit.DB import * # Import DocumentManager and TransactionManager clr.AddReference("RevitServices") import RevitServices from RevitServices.Persistence import DocumentManager from RevitServices.Transactions import TransactionManager doc = DocumentManager.Instance.CurrentDBDocument uiapp = DocumentManager.Instance.CurrentUIApplication app = uiapp.Application # The inputs to this node will be stored as a list in the IN variables. schedule_views = UnwrapElement(IN[0]) field = ScheduleFieldId(0) target_definitions = [] target_filters = [] # Place your code below this line TransactionManager.Instance.EnsureInTransaction(doc) count = 0 for view in schedule_views: target_def = view.Definition target_definitions.append(target_def) for view in schedule_views: single_filter = ScheduleFilter(field, ScheduleFilterType.Equal, view.Name) target_filters.append(single_filter) for this_def, this_filter in zip(target_definitions, target_filters): this_def.InsertFilter(this_filter, 0) TransactionManager.Instance.TransactionTaskDone() # Assign your output to the OUT variable. OUT = schedule_views ``` I don’t want to mark this as solved because I would like to know how to correctly use the node but it may not be possible. ---
**Author:** ![Hamish](https://avatars.discourse-cdn.com/v4/letter/h/a5b964/32.png) [@Hamish](https://forum.dynamobim.com/u/Hamish)\ **Post date:** [November 30, 2021, 10:16pm UTC](https://forum.dynamobim.com/t/assigning-filters-with-scheduleview-addfilters-node-by-using-two-lists/70904/6 "2021-11-30T22:16:37Z")
Looks like a list levels issue. Set your inputs to Views @L2 and Filters @L1 and it should work. I believe this node is expecting the filters to be one level deeper in list nesting with the default inputs. Either it’s a single view and a list of filters, or a list of views and a list of lists of filters. ---
**Author:** ![StephenDini](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/stephendini/32/127724_2.png) [@StephenDini](https://forum.dynamobim.com/u/StephenDini)\ **Post date:** [November 30, 2021, 10:37pm UTC](https://forum.dynamobim.com/t/assigning-filters-with-scheduleview-addfilters-node-by-using-two-lists/70904/7 "2021-11-30T22:37:04Z")
I attempted your solution and it no longer errors but it only sets the value to the first in the filter list. So each view is filtered by the same value. I will mess with this some more tomorrow, Thank you for your time. EDIT: I thought the same as you did also and tried a bunch of way to organize the filter list all with no success. ---
**Author:** ![Hamish](https://avatars.discourse-cdn.com/v4/letter/h/a5b964/32.png) [@Hamish](https://forum.dynamobim.com/u/Hamish)\ **Post date:** [November 30, 2021, 10:48pm UTC](https://forum.dynamobim.com/t/assigning-filters-with-scheduleview-addfilters-node-by-using-two-lists/70904/8 "2021-11-30T22:48:12Z")
Try @L1 on both then, or flip the L1/L2 around. Just shooting from the hip, would have to pull up a project to see for sure. Doing a list.chop on your filters list at length 1 and using the default inputs without levels should also do the trick to get your filters 1 level deeper than your views. ---
**Author:** ![StephenDini](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/stephendini/32/127724_2.png) [@StephenDini](https://forum.dynamobim.com/u/StephenDini)\ **Post date:** [December 22, 2021, 7:09pm UTC](https://forum.dynamobim.com/t/assigning-filters-with-scheduleview-addfilters-node-by-using-two-lists/70904/9 "2021-12-22T19:09:27Z")
Sorry for the late response I got busy. List.Chop actually worked and was simpler than my own python solution. Thank you!