[pykml] "AttributeError: 'lxml.etree._ElementTree' object has no attribute 'Document'

[Winfried]

And here's how to read coordinates from a single Placemark section in a bigger KML file, and build a smaller file with just that part:

from pykml import parser
from lxml import etree
from pykml.factory import KML_ElementMaker as KML

with open('input.kml') as f:
	tree = parser.parse(f)
root = tree.getroot()
coords = root.Document.Folder.Placemark.LineString.coordinates

doc = KML.kml(
    KML.Placemark(
        KML.name("test"),
        KML.Style(KML.LineStyle(KML.color("FF0000FF"))),
        KML.LineString(
            KML.coordinates(coords)
        )
    )
)

outfile = open('output.kml','wb')
outfile.write(etree.tostring(doc, pretty_print=True))