Replace dependency pytz with zoneinfo. Ref #2958

docs/install.rst

@@ -64,7 +64,7 @@ automatically installed without any action on your part:
 * `pygments <https://pypi.org/project/Pygments/>`_, for syntax highlighting
 * `docutils <https://pypi.org/project/docutils/>`_, for supporting
   reStructuredText as an input format
-* `pytz <https://pypi.org/project/pytz/>`_, for timezone definitions
+* `backports.zoneinfo` <https://pypi.org/project/backports.zoneinfo/>`_, for timezone definitions
 * `blinker <https://pypi.org/project/blinker/>`_, an object-to-object and
   broadcast signaling system
 * `unidecode <https://pypi.org/project/Unidecode/>`_, for ASCII

pelican/contents.py

@@ -7,7 +7,10 @@ import re
 from html import unescape
 from urllib.parse import unquote, urljoin, urlparse, urlunparse
 
-import pytz
+try:
+    import zoneinfo
+except ImportError:
+    from backports import zoneinfo
 
 from pelican.plugins import signals
 from pelican.settings import DEFAULT_CONFIG
@@ -122,7 +125,7 @@ class Content:
         # manage timezone
         default_timezone = settings.get('TIMEZONE', 'UTC')
         timezone = getattr(self, 'timezone', default_timezone)
-        self.timezone = pytz.timezone(timezone)
+        self.timezone = zoneinfo.ZoneInfo(timezone)
 
         if hasattr(self, 'date'):
             self.date = set_date_tzinfo(self.date, timezone)
@@ -525,7 +528,7 @@ class Article(Content):
             if self.date.tzinfo is None:
                 now = datetime.datetime.now()
             else:
-                now = datetime.datetime.utcnow().replace(tzinfo=pytz.utc)
+                now = datetime.datetime.utcnow().replace(tzinfo=zoneinfo.ZoneInfo("UTC"))
             if self.date > now:
                 self.status = 'draft'
 

pelican/tests/test_utils.py

@@ -6,7 +6,10 @@ import time
 from sys import platform
 from tempfile import mkdtemp
 
-import pytz
+try:
+    import zoneinfo
+except ImportError:
+    from backports import zoneinfo
 
 from pelican import utils
 from pelican.generators import TemplatePagesGenerator
@@ -42,21 +45,21 @@ class TestUtils(LoggedTestCase):
             year=2012, month=11, day=22, hour=22, minute=11)
         date_hour_z = utils.SafeDatetime(
             year=2012, month=11, day=22, hour=22, minute=11,
-            tzinfo=pytz.timezone('UTC'))
+            tzinfo=zoneinfo.ZoneInfo('UTC'))
         date_hour_est = utils.SafeDatetime(
             year=2012, month=11, day=22, hour=22, minute=11,
-            tzinfo=pytz.timezone('EST'))
+            tzinfo=zoneinfo.ZoneInfo('EST'))
         date_hour_sec = utils.SafeDatetime(
             year=2012, month=11, day=22, hour=22, minute=11, second=10)
         date_hour_sec_z = utils.SafeDatetime(
             year=2012, month=11, day=22, hour=22, minute=11, second=10,
-            tzinfo=pytz.timezone('UTC'))
+            tzinfo=zoneinfo.ZoneInfo('UTC'))
         date_hour_sec_est = utils.SafeDatetime(
             year=2012, month=11, day=22, hour=22, minute=11, second=10,
-            tzinfo=pytz.timezone('EST'))
+            tzinfo=zoneinfo.ZoneInfo('EST'))
         date_hour_sec_frac_z = utils.SafeDatetime(
             year=2012, month=11, day=22, hour=22, minute=11, second=10,
-            microsecond=123000, tzinfo=pytz.timezone('UTC'))
+            microsecond=123000, tzinfo=zoneinfo.ZoneInfo('UTC'))
         dates = {
             '2012-11-22': date,
             '2012/11/22': date,
@@ -78,13 +81,13 @@ class TestUtils(LoggedTestCase):
         iso_8601_date = utils.SafeDatetime(year=1997, month=7, day=16)
         iso_8601_date_hour_tz = utils.SafeDatetime(
             year=1997, month=7, day=16, hour=19, minute=20,
-            tzinfo=pytz.timezone('CET'))
+            tzinfo=zoneinfo.ZoneInfo('CET'))
         iso_8601_date_hour_sec_tz = utils.SafeDatetime(
             year=1997, month=7, day=16, hour=19, minute=20, second=30,
-            tzinfo=pytz.timezone('CET'))
+            tzinfo=zoneinfo.ZoneInfo('CET'))
         iso_8601_date_hour_sec_ms_tz = utils.SafeDatetime(
             year=1997, month=7, day=16, hour=19, minute=20, second=30,
-            microsecond=450000, tzinfo=pytz.timezone('CET'))
+            microsecond=450000, tzinfo=zoneinfo.ZoneInfo('CET'))
         iso_8601 = {
             '1997-07-16': iso_8601_date,
             '1997-07-16T19:20+01:00': iso_8601_date_hour_tz,

pelican/tools/pelican_quickstart.py

@@ -4,10 +4,14 @@ import argparse
 import locale
 import os
 from typing import Mapping
+from zoneinfo import available_timezones
 
 from jinja2 import Environment, FileSystemLoader
 
-import pytz
+try:
+    import zoneinfo
+except ImportError:
+    from backports import zoneinfo
 
 try:
     import readline  # NOQA
@@ -158,12 +162,13 @@ def ask(question, answer=str, default=None, length=None):
 
 def ask_timezone(question, default, tzurl):
     """Prompt for time zone and validate input"""
-    lower_tz = [tz.lower() for tz in pytz.all_timezones]
+    available_timezones = list(zoneinfo.available_timezones())
+    lower_tz = [tz.lower() for tz in available_timezones]
     while True:
         r = ask(question, str, default)
         r = r.strip().replace(' ', '_').lower()
         if r in lower_tz:
-            r = pytz.all_timezones[lower_tz.index(r)]
+            r = available_timezones[lower_tz.index(r)]
             break
         else:
             print('Please enter a valid time zone:\n'

pelican/utils.py

@@ -20,7 +20,10 @@ import dateutil.parser
 
 from markupsafe import Markup
 
-import pytz
+try:
+    import zoneinfo
+except ImportError:
+    from backports import zoneinfo
 
 
 logger = logging.getLogger(__name__)
@@ -920,8 +923,8 @@ class FileSystemWatcher:
 def set_date_tzinfo(d, tz_name=None):
     """Set the timezone for dates that don't have tzinfo"""
     if tz_name and not d.tzinfo:
-        tz = pytz.timezone(tz_name)
-        d = tz.localize(d)
+        tz = zoneinfo.ZoneInfo(tz_name)
+        d = d.replace(tzinfo=tz)
         return SafeDatetime(d.year, d.month, d.day, d.hour, d.minute, d.second,
                             d.microsecond, d.tzinfo)
     return d

pyproject.toml

@@ -37,10 +37,10 @@ feedgenerator = ">=1.9"
 jinja2 = ">=2.7"
 pygments = ">=2.6"
 python-dateutil = ">=2.8"
-pytz = ">=2020.1"
 rich = ">=10.1"
 unidecode = ">=1.1"
 markdown = {version = ">=3.1", optional = true}
+"backports.zoneinfo" = "^0.2.1"
 
 [tool.poetry.dev-dependencies]
 BeautifulSoup4 = "^4.9"

setup.py

@@ -5,12 +5,11 @@ from os.path import join, relpath
 
 from setuptools import find_packages, setup
 
-
 version = "4.7.1"
 
 requires = ['feedgenerator >= 1.9', 'jinja2 >= 2.7', 'pygments',
-            'docutils>=0.15', 'pytz >= 0a', 'blinker', 'unidecode',
-            'python-dateutil', 'rich']
+            'docutils>=0.15', 'backports.zoneinfo;python_version<"3.9"',
+            'blinker', 'unidecode', 'python-dateutil', 'rich']
 
 entry_points = {
     'console_scripts': [