SectionView from SectionLine in Python

And your script makes too many temporary lists which are not necessary.
The more list making the more time taking.

import clr
import System

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

clr.AddReference('RevitServices')
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager
doc = DocumentManager.Instance.CurrentDBDocument


# get sectionlines in active view
sectionlines = FilteredElementCollector(doc, doc.ActiveView.Id).OfCategory(BuiltInCategory.OST_Viewers).ToElements()
# get viewname parameter

# get all views in project
allViews = FilteredElementCollector(doc).OfCategory(BuiltInCategory.OST_Views).ToElements()
views = []
# get viewnames of all views in project
for sectionline in sectionlines:
	sectionName=sectionline.Name
	for allView in allViews:
		viewName=allView.Name
		if viewName == sectionName:	
			views.append(allView)
			break #stop looping if match found
OUT =  views
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