Creates centroids from closed lines by creating temporary polygons.

linesToPolysToCentroids.py

#
# @date 26/06/2015
# @author Cindy Williams
#
# Creates centroids from closed lines by creating temporary 
# polygons.
#
# For use as as a standalone script.
#

import arcpy

arcpy.env.workspace = r"C:\Some\Arb\Folder\work.gdb"

lyr_line = "ftr_line"
lyr_point = "ftr_point"
fields = ["SHAPE@", "Name"]
cursor_ins = arcpy.da.InsertCursor(lyr_point, fields)

with arcpy.da.SearchCursor(lyr_line, fields) as cursor:
	for row in cursor:
		poly = arcpy.Polygon(row[0].getPart())
		centroid = arcpy.PointGeometry(poly.centroid)
		cursor_ins.insertRow([centroid, row[1]])

del cursor_ins
print("Script complete.")