Remove Python 3.8 support

Python 3.8 is no longer part of the tested runtimes for 2024.2[1]
because its EOL is coming soon.

[1] https://governance.openstack.org/tc/reference/runtimes/2024.2.html

Change-Id: I96fd8e6bec846065c9dc73d2f3af5899099461a4

oslo_utils/timeutils.py

@@ -22,15 +22,10 @@ import datetime
 import functools
 import logging
 import time
+import zoneinfo
 
 import iso8601
 
-try:
-    import zoneinfo
-except ImportError:
-    # zoneinfo is available in Python >= 3.9
-    import pytz
-    zoneinfo = None
 
 from oslo_utils import reflection
 
@@ -233,13 +228,8 @@ def unmarshall_time(tyme):
     if tzname:
         # Need to handle either iso8601 or python UTC format
         tzname = 'UTC' if tzname == 'UTC+00:00' else tzname
-
-        if zoneinfo:
-            tzinfo = zoneinfo.ZoneInfo(tzname)
-            dt = dt.replace(tzinfo=tzinfo)
-        else:
-            tzinfo = pytz.timezone(tzname)
-            dt = tzinfo.localize(dt)
+        tzinfo = zoneinfo.ZoneInfo(tzname)
+        dt = dt.replace(tzinfo=tzinfo)
 
     return dt
 

releasenotes/notes/remove-py38-a22bb6c463f92868.yaml

@@ -0,0 +1,5 @@
+---
+upgrade:
+  - |
+    Support for Python 3.8 has been removed. Now the minimum python version
+    supported is 3.9 .

requirements.txt

@@ -5,11 +5,10 @@
 
 iso8601>=0.1.11 # MIT
 oslo.i18n>=3.15.3 # Apache-2.0
-pytz>=2013.6;python_version<"3.9" # MIT
 netaddr>=0.10.0 # BSD
 netifaces>=0.10.4 # MIT
 debtcollector>=1.2.0 # Apache-2.0
 pyparsing>=2.1.0 # MIT
 packaging>=20.4 # BSD
-tzdata>=2022.4;python_version>="3.9" # MIT
+tzdata>=2022.4 # MIT
 PyYAML>=3.13 # MIT

setup.cfg

@@ -6,7 +6,7 @@ description_file =
 author = OpenStack
 author_email = openstack-discuss@lists.openstack.org
 home_page = https://docs.openstack.org/oslo.utils/latest/
-python_requires = >=3.8
+python_requires = >=3.9
 classifier =
     Environment :: OpenStack
     Intended Audience :: Information Technology
@@ -15,7 +15,6 @@ classifier =
     Operating System :: POSIX :: Linux
     Programming Language :: Python
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11