Merge pull request #10401 from gem/timezone

Import `timezonefinder` at runtime as it was before

openquake/hazardlib/shakemap/parsers.py

@@ -36,7 +36,6 @@
 import pandas as pd
 from datetime import datetime
 from zoneinfo import ZoneInfo
-from timezonefinder import TimezoneFinder
 from shapely.geometry import Polygon
 import numpy
 
@@ -243,6 +242,16 @@ def utc_to_local_time(utc_timestamp, lon, lat):
     """
     Convert a timestamp '%Y-%m-%dT%H:%M:%S.%fZ' into a datetime object
     """
+    try:
+        # NOTE: mandatory dependency for ARISTOTLE
+        from timezonefinder import TimezoneFinder
+    except ImportError:
+        raise ImportError(
+            'The python package "timezonefinder" is not installed. It is'
+            ' required in order to convert the UTC time to the local time of'
+            ' the event. You can install it from'
+            ' https://wheelhouse.openquake.org/v3/linux/ choosing the one'
+            ' corresponding to the installed python version.')
     tf = TimezoneFinder()
     timezone_str = tf.timezone_at(lng=lon, lat=lat)
     if timezone_str is None: