ArcPy: Remove Holes in Polygons

arcpy_remove_holes_in_polygons.py

#!python
# Reference: 1) https://pro.arcgis.com/en/pro-app/arcpy/classes/spatialreference.htm
#            2) https://pro.arcgis.com/en/pro-app/arcpy/classes/array.htm
#            3) https://pro.arcgis.com/en/pro-app/arcpy/classes/polygon.htm
#            4) https://pro.arcgis.com/en/pro-app/arcpy/data-access/updatecursor-class.htm
#            5) https://docs.python.org/3/library/itertools.html

import arcpy
from itertools import takewhile

# Example 1: Remove holes in single polygon
polygon = # Polygon with holes

SR = polygon.spatialReference
polygon = arcpy.Polygon(
    arcpy.Array(
        (pt for pt in takewhile(bool, part))
        for part
        in polygon.getPart() or arcpy.Array(arcpy.Array())
    ), SR
)

# Example 2: Remove holes from polygons in feature class
fc = # Path to feature class containing polygons with holes

with arcpy.da.UpdateCursor(fc, "SHAPE@") as cur:
    for polygon, in cur:
        if polygon is None: continue
        SR = polygon.spatialReference
        polygon = arcpy.Polygon(
            arcpy.Array(
                (pt for pt in takewhile(bool, part))
                for part
                in polygon.getPart() or arcpy.Array(arcpy.Array())
            ), SR
        )
        cur.updateRow([polygon])

#