- Replace timezonefinder with tzfpy for improved performance

- Update Python compatibility to 3.11+
- Bump version to 0.0.14

Author: josteinl

.github/workflows/branch.yaml

@@ -33,7 +33,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.11', '3.12', '3.13']
 
     steps:
       - uses: actions/checkout@v4

CHANGES.md

@@ -1,6 +1,13 @@
 # NGI Python Coordinate Projector Package
 
 
+## Version 0.0.14
+_2025-08-19_
+
+Internal
+
+- Replace the package `timezonefinder` with `tzfpy` for improved performance.
+
 ## Version 0.0.13
 _2025-05-21_
 

pyproject.toml

@@ -1,12 +1,12 @@
 [project]
 name = "coordinate-projector"
-version = "0.0.13"
+version = "0.0.14"
 description = "Project points from one projection to another using pyproj"
 authors = [
     { name = "Helge Smebye" },
     { name = "Jostein Leira", email = "jostein@leira.net" },
 ]
-requires-python = ">=3.10,<4"
+requires-python = ">=3.11,<4"
 readme = "README.md"
 license = "MIT"
 maintainers = [{ name = "Jostein Leira", email = "jostein@leira.net" }]
@@ -20,7 +20,7 @@ dependencies = [
     "pyproj>=3.6.1,<4",
     "python-dateutil>=2.8.2,<3",
     "types-python-dateutil>=2.8.19,<3",
-    "timezonefinder",
+    "tzfpy[tzdata]>=1.0.0",
 ]
 
 [project.urls]

src/coordinate_projector/datetime_parser.py

@@ -3,17 +3,15 @@
 """
 
 from datetime import datetime
-
+from zoneinfo import ZoneInfo
 
 from dateutil import tz
-from timezonefinder import TimezoneFinder
+from tzfpy import get_tz
 
 from coordinate_projector.projector import Projector
 
 projector = Projector()
 
-_time_zone_finder: TimezoneFinder | None = None
-
 
 def ensure_tz(
     dt: datetime | None,
@@ -32,13 +30,11 @@ def ensure_tz(
     If no location or timezone is provided, then assume the passed datetime is
     recorded in the norwegian timezone.
     """
-    global _time_zone_finder
-
     if not dt:
         return dt
 
     if not isinstance(dt, datetime):
-        raise Exception("Got unexpected type for datetime!")
+        raise TypeError("Got unexpected type for datetime!")
 
     if dt.tzinfo is None or dt.tzinfo.utcoffset(dt) is None:
         # timezone naive (no time zone in dt)
@@ -47,15 +43,12 @@ def ensure_tz(
                 longitude, latitude = projector.transform(from_srid=srid, to_srid=4326, east=longitude, north=latitude)
 
             # find timezone from position
-            if not _time_zone_finder:
-                _time_zone_finder = TimezoneFinder()
-
-            input_timezone = tz.gettz(_time_zone_finder.timezone_at(lng=longitude, lat=latitude))
+            input_timezone = get_tz(lng=longitude, lat=latitude)
         else:
             # Assume Norway
-            input_timezone = tz.gettz("Europe/Oslo")
+            input_timezone = "Europe/Oslo"
 
-        dt = dt.replace(tzinfo=input_timezone)
+        dt = dt.replace(tzinfo=ZoneInfo(input_timezone))
 
     return dt