Improve error reporting

core/lookup_helper.py

@@ -11,6 +11,7 @@ from pyhamtools import LookupLib, Callinfo, callinfo
 from pyhamtools.exceptions import APIKeyMissingError
 from pyhamtools.frequency import freq_to_band
 from pyhamtools.locator import latlong_to_locator
+from requests.exceptions import ConnectionError
 from requests_cache import CachedSession
 
 from core.cache_utils import SEMI_STATIC_URL_DATA_CACHE

core/sig_utils.py

@@ -2,6 +2,7 @@ import csv
 import logging
 
 from pyhamtools.locator import latlong_to_locator, locator_to_latlong
+from requests.exceptions import ConnectionError
 
 from core.cache_utils import SEMI_STATIC_URL_DATA_CACHE
 from core.constants import SIGS, HTTP_HEADERS