Google KML file to python - kml

Question

I have the following code to access coordinates of kml files in python
from pykml import parser
with open('test.kml', 'r') as kml_file:
root = parser.parse(kml_file).getroot()
for i in root.findall('{http://www.opengis.net/kml/2.2}Document/{http://www.opengis.net/kml/2.2}Placemark/{http://www.opengis.net/kml/2.2}Point'):
print(i.coordinates)
This one finds me all individual points in the kml file, where I marked a certain points of interest. But I also have some polygons of points that I created in google earth and this algorithm does not return them. How can I also get the polygons?
Please let me know if you have any questions.

Answer 1

If the KML source file has a Document with Placemarks then the following Python code will iterate over each Placemark with a Polygon geometry and dump out the coordinates.
from pykml import parser
with open('test.kml', 'r') as f:
root = parser.parse(f).getroot()
namespace = {"kml": 'http://www.opengis.net/kml/2.2'}
pms = root.xpath(".//kml:Placemark[.//kml:Polygon]", namespaces=namespace)
for p in pms:
print(p.Polygon.outerBoundaryIs.LinearRing.coordinates)
If the KML uses MultiGeometry with one or more Polygons then a small change is needed to the check inside the for loop.
for p in pms:
if getattr(p, 'MultiGeometry'):
for poly in p.MultiGeometry.Polygon:
print(poly.outerBoundaryIs.LinearRing.coordinates)
else:
print(p.Polygon.outerBoundaryIs.LinearRing.coordinates)