Drop support for Python 3.8

.github/workflows/python-package.yml

@@ -29,10 +29,10 @@ jobs:
     needs: pre_job
     strategy:
       matrix:
-        python-version: ['3.8', '3.12']
+        python-version: ['3.9', '3.13']
         include:
         # Allow failure on Python dev - e.g. Cython install regularly fails
-          - python-version: "3.13-dev"
+          - python-version: "3.14-dev"
             allowed_failure: true
       max-parallel: 1
 
@@ -58,7 +58,7 @@ jobs:
 
     - name: Install cutting-edge Cython-based packages on Python dev versions
       continue-on-error: ${{ matrix.allowed_failure || false }}
-      if: matrix.python-version == '3.13-dev'
+      if: matrix.python-version == '3.14-dev'
       run: |
         sudo apt-get install libxml2-dev libxslt1-dev
         python -m pip install git+https://github.com/cython/cython.git
@@ -96,7 +96,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: '3.11'
+        python-version: '3.13'
 
     - name: Unencrypt secret file
       env:

CHANGELOG.md

@@ -3,6 +3,7 @@ Change Log
 
 HEAD
 ----
+- Dropped support for Python 3.8 which is EOL per October 7, 2024.
 
 
 5.4.3

exchangelib/__init__.py

@@ -106,9 +106,9 @@
     "discover",
 ]
 
-# Set a default user agent, e.g. "exchangelib/3.1.1 (python-requests/2.22.0)"
 import requests.utils
 
+# Set a default user agent, e.g. "exchangelib/5.4.3 (python-requests/2.31.0)"
 BaseProtocol.USERAGENT = f"{__name__}/{__version__} ({requests.utils.default_user_agent()})"
 
 

exchangelib/ewsdatetime.py

@@ -1,10 +1,6 @@
 import datetime
 import logging
-
-try:
-    import zoneinfo
-except ImportError:
-    from backports import zoneinfo
+import zoneinfo
 
 import tzlocal
 
@@ -283,7 +279,6 @@ def from_timezone(cls, tz):
         try:
             return {
                 cls.__module__.split(".")[0]: lambda z: z,
-                "backports": cls.from_zoneinfo,
                 "datetime": cls.from_datetime,
                 "dateutil": cls.from_dateutil,
                 "pytz": cls.from_pytz,

pyproject.toml

@@ -16,7 +16,7 @@ name = "exchangelib"
 dynamic = ["version"]
 description = "Client for Microsoft Exchange Web Services (EWS)"
 readme = {file = "README.md", content-type = "text/markdown"}
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 license = {text = "BSD-2-Clause"}
 keywords = [
     "autodiscover",
@@ -38,7 +38,6 @@ classifiers = [
     "Programming Language :: Python :: 3",
 ]
 dependencies = [
-    'backports.zoneinfo; python_version < "3.9"',
     "cached_property",
     "defusedxml >= 0.6.0",
     "dnspython >= 2.2.0",

scripts/optimize.py

@@ -5,13 +5,9 @@
 import datetime
 import logging
 import time
+import zoneinfo
 from pathlib import Path
 
-try:
-    import zoneinfo
-except ImportError:
-    from backports import zoneinfo
-
 from yaml import safe_load
 
 from exchangelib import DELEGATE, Account, CalendarItem, Configuration, Credentials, FaultTolerance

tests/common.py

@@ -5,17 +5,13 @@
 import time
 import unittest
 import unittest.util
+import zoneinfo
 from collections import namedtuple
 from decimal import Decimal
 from pathlib import Path
 
 from yaml import safe_load
 
-try:
-    import zoneinfo
-except ImportError:
-    from backports import zoneinfo
-
 from exchangelib.account import Account, Identity
 from exchangelib.attachments import FileAttachment
 from exchangelib.configuration import Configuration

tests/test_ewsdatetime.py

@@ -1,15 +1,11 @@
 import datetime
 import unittest
+import zoneinfo
 
 import dateutil.tz
 import pytz
 import requests_mock
 
-try:
-    import zoneinfo
-except ImportError:
-    from backports import zoneinfo
-
 from exchangelib.errors import NaiveDateTimeNotAllowed, UnknownTimeZone
 from exchangelib.ewsdatetime import UTC, EWSDate, EWSDateTime, EWSTimeZone
 from exchangelib.util import CONNECTION_ERRORS

tests/test_field.py

@@ -1,13 +1,9 @@
 import datetime
 import warnings
+import zoneinfo
 from collections import namedtuple
 from decimal import Decimal
 
-try:
-    import zoneinfo
-except ImportError:
-    from backports import zoneinfo
-
 from exchangelib.extended_properties import ExternId
 from exchangelib.fields import (
     Base64Field,

tests/test_items/test_contacts.py

@@ -1,9 +1,5 @@
 import datetime
-
-try:
-    import zoneinfo
-except ImportError:
-    from backports import zoneinfo
+import zoneinfo
 
 from exchangelib.errors import ErrorInvalidIdMalformed
 from exchangelib.folders import Contacts

tests/test_items/test_generic.py

@@ -1,9 +1,5 @@
 import datetime
-
-try:
-    import zoneinfo
-except ImportError:
-    from backports import zoneinfo
+import zoneinfo
 
 from exchangelib.attachments import ItemAttachment
 from exchangelib.errors import ErrorInternalServerError, ErrorItemNotFound

tests/test_protocol.py

@@ -4,14 +4,10 @@
 import socket
 import tempfile
 import warnings
+import zoneinfo
 from contextlib import suppress
 from unittest.mock import Mock, patch
 
-try:
-    import zoneinfo
-except ImportError:
-    from backports import zoneinfo
-
 import psutil
 import requests_mock
 from oauthlib.oauth2 import InvalidClientIdError

tests/test_restriction.py

@@ -1,9 +1,5 @@
 import datetime
-
-try:
-    import zoneinfo
-except ImportError:
-    from backports import zoneinfo
+import zoneinfo
 
 from exchangelib.folders import Calendar, Root
 from exchangelib.queryset import Q