Dynamo Python: FilterElementCollector(doc) by Parameter exists in elements

Developers
, ,
1

I’m trying to filter out all elements from by active document in Dynamo python by parameter name id it exists in the elements.

Heres my Python code:

# Load the Python Standard and DesignScript Libraries
import sys
import clr 

clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *

clr.AddReference('RevitServices')
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager


def get_parameter_value_by_name(find, element, parameterName):
	if str(find) == element.LookupParameter(parameterName).AsString():
		return element

	
doc = DocumentManager.Instance.CurrentDBDocument

find= IN[0]
# 'find' contains the value of parameters, based on this we need to filter out the elements

elem = FilteredElementCollector(doc).WhereElementIsNotElementType().ToElements()
#All element in document (or I say Model) 

elements = []

# Place your code below this line
for i in find:
	for j in elem:
		try:
			elements.append(get_parameter_value_by_name(i, j, "JB"))
		except:
			pass
	continue
# Assign your output to the OUT variable.
OUT = elements

Didn’t know a lot about Revit API, I think I’m writing something wrong didn’t figure out where and what ?

2

Hi @ashwani.kumar1

image
image1728×814 182 KB 

import sys
import clr 

clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *

clr.AddReference('RevitServices')
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager


def get_parameter_value_by_name(find, element, parameterName):
	if str(find) == element.LookupParameter(parameterName).AsString():
		return element

	
doc = DocumentManager.Instance.CurrentDBDocument

find= IN[0]
# 'find' contains the value of parameters, based on this we need to filter out the elements

elem = FilteredElementCollector(doc).WhereElementIsNotElementType().ToElements()
#All element in document (or I say Model) 

elements = []

# Place your code below this line
for i in elem:
	try:
		elements.append(get_parameter_value_by_name(find, i, "Comments"))
	except:
		pass
	
# Assign your output to the OUT variable.
OUT = filter(None, elements)
3

Thanks @Kulkul,

I suppose haven’t asked my question properly or in a right way.

Earlier, with this script I already got the elements that having those values as an output. But in addition to that I also need the remaining elements as well , who has ‘JB’ parameters as in its properties , weather its contain bank value.

And I suppose I can just add one more blank item in my ‘find’ input list.

find= IN[0]+[" "]
#But its no good, all elements not appeared having 'JB' parameter

Hope this time, it will be clear. In your case, the same goes for ‘Comments’

Or I would say, I need to filter out the elements by parameter names (‘JB’) if exists not by its value.

4

?

image
image846×713 114 KB

5

Yeah, that exactly right, What did you do ?

6 
for e in elem:
	try:
		params = e.Parameters
		paramNames = [i.Definition.Name for i in params]
		if param in paramName:
			elements_contains_param.append(e)
1 Like
7

Thanks, @Kulkul. This resolves the Issue, What I missed the method and i.e. Definition.Name. Thanks this really helps.

8

@ashwani.kumar1 Mark the post as solved.