# Python - Set Family Parameter Values **URL:** \ **Category:** Developers\ **Tags:** python\ **Created:** [March 27, 2017, 5:13am UTC](https://forum.dynamobim.com/t/python-set-family-parameter-values/10608 "2017-03-27T05:13:57Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Matt\_Fleming](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/matt_fleming/32/8868_2.png) [@Matt\_Fleming](https://forum.dynamobim.com/u/Matt_Fleming)\ **Post date:** [March 27, 2017, 5:13am UTC](https://forum.dynamobim.com/t/python-set-family-parameter-values/10608/1 "2017-03-27T05:13:57Z")
Hi, I’m trying to work on a Python Script that takes in a bunch of Family Types, Type Parameters and Values and set their values within the Project Environment. I’m able to set System Family Parameters but I’m having troubles with loadable family types. To start off with, I’m unable to even get the Parameter values, as get\_Parameter() is giving me errors. I should be able to cycle through the Parameters within the selected Family Type and get the values but I’m missing something. Then I should be able to use the element.Set(Value) I woud think? current code below: [python\_set\_param.py](https://forum.dynamobim.com/uploads/short-url/idhYH3MWXKMeRjUv677R9T7NeYi.py) (1.7 KB) * * * Or Below in odd Forum Format… Not sure where “CodeBlock” format went to? import clr import sys # Import RevitAPI clr.AddReference(‘RevitAPI’) from Autodesk.Revit.DB import \* # Import RevitAPIUI clr.AddReference(‘RevitAPIUI’) # Import DocumentManager and TransactionManager clr.AddReference(‘RevitServices’) import RevitServices from RevitServices.Persistence import DocumentManager from RevitServices.Transactions import TransactionManager # Import Dynamo Python References clr.AddReference(‘ProtoGeometry’) from Autodesk.DesignScript.Geometry import \* # Import RevitNodes clr.AddReference(‘RevitNodes’) # Assign Labels to Revit Document and Application doc = DocumentManager.Instance.CurrentDBDocument app = DocumentManager.Instance.CurrentUIApplication.Application doc = DocumentManager.Instance.CurrentDBDocument uiapp = DocumentManager.Instance.CurrentUIApplication app = uiapp.Application famType = IN[0] param = IN[1] val = IN[2] outTC = builtInParmTM = BuiltInParameter.ALL\_MODEL\_TYPE\_MARK builtInParmComm = BuiltInParameter.ALL\_MODEL\_INSTANCE\_COMMENTS #TransactionManager.Instance.EnsureInTransaction(doc) # Cycle through all Family Element Types for i in famType: # Cycle through All Type Parameters from Family Type for params in i.Parameters: #Get BuiltInParameter Values comments = i.get\_Parameter(builtInParmComm) typeMark = i.get\_Parameter(builtInParmTM) outTC.append(typeMark.AsString()) if param.IsShared and param.Definition.Name == param[1]: paramVal = i.get\_Parameter(param.GUID) outTC.append(paramVal.AsString()) #Set BuiltInParameter Values #typeMark = c.Set(val) #TransactionManager.Instance.TransactionTaskDone() OUT = outTC ---
**Author:** ![T\_Pover](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/t_pover/32/19147_2.png) [@T\_Pover](https://forum.dynamobim.com/u/T_Pover)\ **Post date:** [March 27, 2017, 7:39am UTC](https://forum.dynamobim.com/t/python-set-family-parameter-values/10608/2 "2017-03-27T07:39:24Z")
Hi Matt, to start off you should Unwrap the family types in your code like this: famType = UnwrapElement(IN[0]) That should solve your first error, but there’s probably more to follow. ---
**Author:** ![Tomasz\_Puchala](https://avatars.discourse-cdn.com/v4/letter/t/5f9b8f/32.png) [@Tomasz\_Puchala](https://forum.dynamobim.com/u/Tomasz_Puchala)\ **Post date:** [March 27, 2017, 10:35am UTC](https://forum.dynamobim.com/t/python-set-family-parameter-values/10608/3 "2017-03-27T10:35:18Z")
Hi, try this [python\_set\_param\_changed.py](https://forum.dynamobim.com/uploads/short-url/3o0I1ybgV8jwcoMXxRj0LsiodVn.py) (1.8 KB) ---
**Author:** ![Matt\_Fleming](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/matt_fleming/32/8868_2.png) [@Matt\_Fleming](https://forum.dynamobim.com/u/Matt_Fleming)\ **Post date:** [March 27, 2017, 3:12pm UTC](https://forum.dynamobim.com/t/python-set-family-parameter-values/10608/4 "2017-03-27T15:12:12Z")
I modified a little and got it working to get the Parameter Values. Now I’m trying to remove ‘builtInParmTM = BuiltInParameter.ALL\_MODEL\_TYPE\_MARK’ to avoid any issues when my input is a different BuiltInParameter, so I’m attempting to check if it’s a builtin and if so, get the param. But I can’t figure out how to get them correctly as p.GUID outputs error as it’s not a shared Param. I need to get the “ALL\_MODEL\_TYPE\_MARK” or whatever the case is variable…? [python\_set\_param\_rev1.py](https://forum.dynamobim.com/uploads/short-url/9rdycXyqEhK7hEsrncsueIjrMgM.py) (1.5 KB) BuilderCoder uses a bip check in C# but I’m failing to translate to Python. [Built-In Param Checker](http://thebuildingcoder.typepad.com/blog/2011/09/unofficial-parameters-and-bipchecker.html) ---
**Author:** ![Kulkul](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/kulkul/32/49801_2.png) [@Kulkul](https://forum.dynamobim.com/u/Kulkul)\ **Post date:** [March 27, 2017, 3:35pm UTC](https://forum.dynamobim.com/t/python-set-family-parameter-values/10608/5 "2017-03-27T15:35:55Z")
@Matt_Fleming archi-lab package has nodes that can get you all the built in parameters of elements and also set them. ![](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/b/7/b7e8a35868a98e98b88fe00db07ad4f269fb1b37.jpg) ---
**Author:** ![Matt\_Fleming](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/matt_fleming/32/8868_2.png) [@Matt\_Fleming](https://forum.dynamobim.com/u/Matt_Fleming)\ **Post date:** [March 27, 2017, 3:58pm UTC](https://forum.dynamobim.com/t/python-set-family-parameter-values/10608/6 "2017-03-27T15:58:57Z")
yea but I’m not looking for a node in this case, I’m just after Python. I’m looking for what would be in “Get BuiltInParameter Name” node as an example. I can get the BIP if I specifically declare it. ‘`builtInParmTM = BuiltInParameter.ALL_MODEL_TYPE_MARK`’ But I’m not sure how to get the ‘.ALL\_MODEL\_TYPE\_MARK’ for example from the parameter. ---
**Author:** ![Einar\_Raknes](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/einar_raknes/32/8566_2.png) [@Einar\_Raknes](https://forum.dynamobim.com/u/Einar_Raknes)\ **Post date:** [March 27, 2017, 8:58pm UTC](https://forum.dynamobim.com/t/python-set-family-parameter-values/10608/7 "2017-03-27T20:58:02Z")
> [@Matt\_Fleming](#): > > Not sure where “CodeBlock” format went to? See this: > [@How to get help on the Dynamo forums](https://forum.dynamobim.com/t/how-to-get-help-on-the-dynamo-forums/4677/10): > > Whenever you need help with a python script, be sure to paste the code into your post, mark it and press the \ button: [image]