A 2014 script I wrote to write an integer of 0 to the <heading> tag of KML documents created by ArcMap.
Sometimes ArcMap at the time I wrote this script would produce heading values in a KML file that were unwanted, so this script will open a KML file and set all of the <heading> tags to a node value of 0
Usage
python kmlRemoveHeading.py -f {filename}.kml