Change a description of device interface with Python SDK/Module

Here's how you would do it in the sdk, you'll need to provide the logic to sort through the data and find the one you want to update. Also, this only accounts for pagination on the device list. If your datasource count per device, or your instance count per datasource per device is higher than 1000, you would need to include pagination on those gets (you can use the same method i used on the get_device_list call). 

from lm import lm
#get the devices, find the id of the one we want

#fetch items with pagination
end_found = False
offset = 0
size = 1000
devices = {}
while not end_found:
    data = lm.get_device_list(size=size, offset=offset)
    devices.update({record.id: record for record in data.items})
    offset += size
    end_found = len(data.items) < size

for k,v in devices.items(): print(k, v.name)
#your logic here to select the desired one from the result
deviceId = 152

#get the datasources on that device, find the id of the one we want
device_dses = lm.get_device_datasource_list(deviceId, size=1000).items
for ds in device_dses:
    print(ds.data_source_display_name, ds.id)
#your logic here to select the desired one from the result
hdsId = 9571

#get the instances for that device, for that ds
instances = lm.get_device_datasource_instance_list(deviceId, hdsId, size=1000).items
for instance in instances:
    print(instance.id, instance.description, instance.display_name, instance.name)
#your logic here to select the desired one from the result
id = 146160818

#get the details for a particular instance
instance_details = lm.get_device_datasource_instance_by_id(deviceId, hdsId, id)

#update the description in the local copy of the instance
instance_details.description = "Set by the python sdk"

#send the update back to lm
response = lm.patch_device_datasource_instance_by_id(deviceId, hdsId, id, instance_details)
print(f"Description now set to {response.description}")