manipulate_stationxml.py

import sys
from pyrocko.fdsn import station as fs

# Example on how to manipulate StationXML with Pyrocko (pyrocko.fdsn.station)
#
# Reads StationXML file and replaces sensor orientation and input unit 
# information

sx = fs.load_xml(filename=sys.argv[1])

comp_to_azi_dip = {
    'X': (0., 0.),
    'Y': (90., 0.),
    'Z': (0., -90.),
}

for network in sx.network_list:
    for station in network.station_list:
        for channel in station.channel_list:
            azi, dip = comp_to_azi_dip[channel.code]
            channel.azimuth.value = azi
            channel.dip.value = dip
            channel.response.instrument_sensitivity.input_units.name = 'M'

print sx.dump_xml()