code: def read_gpx(xml, gpxns=None):
      
      tree = etree.parse(xml)
      gpx_element = tree.getroot()
      return parse_gpx(gpx_element, gpxns=gpxns)
docs: Parse a GPX file into a GpxModel.
  
      Args:
          xml: A file-like-object opened in binary mode - that is containing
               bytes rather than characters. The root element of the XML should
               be a <gpx> element containing a version attribute. GPX versions
               1.1 is supported.
  
          gpxns: The XML namespace for GPX in Clarke notation (i.e. delimited
               by curly braces). If None, (the default) the namespace used in
               the document will be determined automatically.