export_fc_to_csv.py

def export_fc_to_csv(fc, out_csv):
    """
    Export each vertex in a line or poly fc to a csv with OID
    user requested at http://arcpy.wordpress.com/about/#comment-348

    example

        import geom_snippets
        geom_snippets.export_fc_to_csv(r"c:\proj\fc1.shp", r"c:\proj\fc1.csv")

    output csv looks like this

        1,56019.99998067904,69118.00001450378
        1,56159.99998080942,69026.0000144181
        1,56359.999980995686,68913.00001431286
        2,34985.00002508866,68936.00001433428
        2,35178.000025268404,68805.00001421227

    """
    import csv

    with open(out_csv, 'w') as csvfile:
        csvwriter = csv.writer(csvfile, delimiter=',', lineterminator='\n')

        with arcpy.da.SearchCursor(fc,
                                   field_names=("OID@","SHAPE@JSON")) as cursor:
            for row in cursor:
                geom = json.loads(row[1])
                for path in geom['paths']:
                    for pt in path:
                        csvwriter.writerow([row[0]] + pt)