Parse a KML file and export it to GeoJSON with GDAL OGR Python bindings

gistfile1.py

from osgeo import ogr

def kml2geojson(kml_file):
    drv = ogr.GetDriverByName('KML')
    kml_ds = drv.Open(kml_file)
    for kml_lyr in kml_ds:
        for feat in kml_lyr:
            print feat.ExportToJson()

kml2geojson('/path/to/your.kml')