Suunto -> garmin GPX

import-export.py

 #!/usr/bin/env python
import argparse  
import xml.etree.ElementTree as ET

def main():
    parser = argparse.ArgumentParser(description='Reporcess a Suuto GPX file to Garmin format')

    parser.add_argument('input', help='Input filename')
    parser.add_argument('output', help='output filename')
    
    args = parser.parse_args()

    input_filename = args.input

    output_filename = args.output
    if output_filename is None:
        output_filename = 'garmin-' + input_filename

    ET._namespace_map["http://www.w3.org/2001/XMLSchema-instance"] = 'xsi'
    ET._namespace_map["http://www.topografix.com/GPX/1/1"] = ''
    ET._namespace_map["http://www.garmin.com/xmlschemas/TrainingCenterDatabase/v2"] = 'tc2'
    ET._namespace_map["http://www.garmin.com/xmlschemas/TrackPointExtension/v1"] = 'tp1'
    ET._namespace_map["http://www.cluetrust.com/XML/GPXDATA/1/0"] = 'gpxdata'

    gpx = ET.parse(input_filename)

    tracks = gpx.findall("trk")

    for track_point in gpx.iter('{http://www.topografix.com/GPX/1/1}trkpt'):
        extensions = track_point.find('{http://www.topografix.com/GPX/1/1}extensions')
        hr_value = extensions.find("{http://www.cluetrust.com/XML/GPXDATA/1/0}hr").text

        for subelement in extensions:
            extensions.remove(subelement)
        garmin_extensions = ET.SubElement(extensions,'tp1:TrackPointExtension')
        new_hr_element = ET.SubElement(garmin_extensions, '{http://www.garmin.com/xmlschemas/TrackPointExtension/v1}hr' )
        new_hr_element.text = hr_value


    gpx.write(output_filename)


if __name__ == '__main__':
    main()