CODE EXAMPLE FOR PYTHON

get parameter value dynamo python

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

import System
from System.Collections.Generic import List

clr.AddReference('RevitNodes')
import Revit
clr.ImportExtensions(Revit.Elements)
clr.ImportExtensions(Revit.GeometryConversion)

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

doc = DocumentManager.Instance.CurrentDBDocument

def tolist(obj1):
	if hasattr(obj1,"__iter__"): return obj1
	else: return [obj1]

def getParam(element,param):
	value = []
	try:
		DB = element.GetParameters(param)
		for i in DB:
			if "Double" in str(i.StorageType): 
				# Metric Converstion
				value.append(i.AsDouble()*304.8)
			elif "Integer" in str(i.StorageType):
				value.append(i.AsInteger())
			elif "String" in str(i.StorageType):
				value.append(i.AsString())
			else:
				elemId =i.AsElementId()
				value.append(doc.GetElement(elemId))
	except:
		pass
	return value

input = tolist(IN[0])
params = IN[1]
result = []

# Get parameters for Multiple Elements
for i in input:
	pack = []
	for p in params:
		elem = UnwrapElement(i)
		pack.append(getParam(elem,p))
	result.append(pack)

OUT = result