How to use the pyshark.packet.layer.Layer function in pyshark

def _packet_from_pdml_packet(pdml_packet):
    layers = [Layer(proto) for proto in pdml_packet.proto]
    geninfo, frame, layers = layers[0], layers[1], layers[2:]
    return Packet(layers=layers, frame_info=frame, number=geninfo.get_field_value('num'),
                  length=geninfo.get_field_value('len'), sniff_time=geninfo.get_field_value('timestamp', raw=True),
                  captured_length=geninfo.get_field_value('caplen'),
                  interface_captured=frame.get_field_value('interface_id', raw=True))

def _packet_from_pdml_packet(pdml_packet):
    layers = [Layer(proto) for proto in pdml_packet.proto]
    geninfo, frame, layers = layers[0], layers[1], layers[2:]
    return Packet(layers=layers, frame_info=frame,
                  length=geninfo.get_field_value('len'), sniff_time=geninfo.get_field_value('timestamp', raw=True),
                  captured_length=geninfo.get_field_value('caplen'),
                  interface_captured=frame.get_field_value('interface_id', raw=True))