@Ernesto_Pellegrino Or just copy paste from here,
import clr
#Import Revit Nodes
clr.AddReference("RevitNodes")
import Revit
clr.ImportExtensions(Revit.Elements)
# Import RevitAPI
clr.AddReference("RevitAPI")
import Autodesk
from Autodesk.Revit.DB import *
# Import DocumentManager and TransactionManager
clr.AddReference("RevitServices")
from RevitServices.Persistence import DocumentManager
doc = DocumentManager.Instance.CurrentDBDocument
allProjParam = []
collector = FilteredElementCollector(doc).OfCategory(BuiltInCategory.OST_ProjectInformation).ToElements()
for projPar in collector:
for parameter in projPar.Parameters:
allProjParam.append(parameter.Definition.Name)
OUT = allProjParam