Delete Line Patterns.py

import clr

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

#Load document reference
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

bool = IN[0]

collector = FilteredElementCollector(doc)
allLinePatterns = collector.OfClass(LinePatternElement).ToElements()

linePatternsNames = UnwrapElement(allLinePatterns)
output = ""
delLinePatternsId = []

if bool == True:
	for l in linePatternsNames:
		if l.Name.startswith("IMPORT"):
			delLinePatternsId.append(l.Id)
	output = str(len(delLinePatternsId)) + " Line Patterns have been deleted"

	TransactionManager.Instance.EnsureInTransaction(doc)

	for l in delLinePatternsId:
		doc.Delete(l)

	TransactionManager.Instance.TransactionTaskDone()

OUT = output