Sensor_keys and datalogger_keys syntax

Usage Questions
1

Dear Forum,

my first attempt at creating stationxml stations with Obspy, please bear with me.
I am having trouble finding guidelines on the syntax of the sensor_keys and datalogger_keys.
I am using NRLvl2 offline. In a particular case, I tried

response = nrl.get_response(
sensor_keys=[‘Nanometrics’, ‘Trillium Compact 120 (Vault, Posthole, OBS)’, ‘754 V/m/s’]

and got the error message

(obspy) joao@msi:~$ python create_station_xml_AO_Trillium.sh
File “/home/joao/create_station_xml_AO_Trillium.sh”, line 131
sensor_keys=[‘Nanometrics’, ‘Trillium Compact 120 (Vault, Posthole, OBS)’, ‘754 V/m/s’]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
SyntaxError: invalid syntax. Perhaps you forgot a comma?

At present my particular case concerns a station with a Trillium Compact and Centaur as per above example, but I also need to create stationxml files for other combinations. I explored obspy.nrl.clients but could’t find guidance. Are there any general syntax rules that apply to sensor_keys and datalogger_keys?

2

Hi, judging from what you posted, your command is missing a closing paranthesis at the end of the line )
SyntaxError: invalid syntax has nothing to do with any ObsPy specifics, its just a general Python problem.

3

Sorry, the closing parenthesis was below, after the datalogger_keys line (not included in the previous post):

response = nrl.get_response(
sensor_keys=[‘Nanometrics’, ‘Trillium Compact 120 (Vault, Posthole, OBS)’, ‘754 V/m/s’]
datalogger_keys=[‘Nanometrics’ , ‘Centaur’ , ‘1Vpp’ ,‘50 Hz’ , ‘Off’ , ‘Linear’])

I understand that the SyntaxError: invalid syntax is not Obspy specific. Still, I would appreciate if you could point me to some guidelines concerning the syntax to use in the sensor and datalogger parameters.
Cheers

4

So now, from looking at what you posted, it looks to be exactly what the error message said, there seems to be a missing comma after sensor_keys to separate the keyword arguments in the function call :wink:

nrl.get_response(
sensor_keys=[...],
datalogger_keys=[...])