Upgrade python>=3.9

.github/workflows/test.yml

@@ -2,9 +2,7 @@ name: Test
 
 on:
   push:
-    branches: [ master ]
   pull_request:
-    branches: [ master ]
 
 permissions:
   contents: read
@@ -16,15 +14,12 @@ jobs:
     name: Python${{ matrix.python-version }}/Django${{ matrix.django-version }}
     strategy:
       matrix:
-        python-version: ["3.8", "3.10"]
-        django-version: ["3.2", "4.0", "4.1", "4.2"]
-        # exclude:
-        #   - python-version: 3.7
-        #     django-version: 4.0
-        #   - python-version: 3.7
-        #     django-version: 4.1
-        #   - python-version: 3.8
-        #     django-version: 4.2
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        django-version: ["4.2", "5.0"]
+        exclude:
+          - python-version: "3.9"
+            django-version: "5.0"
+
 
     steps:
     - uses: actions/checkout@v3
@@ -37,8 +32,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install pytz
-        pip install "Django==${{ matrix.django-version }}.*"
+        pip install "Django~=${{ matrix.django-version }}.0"
 
     - name: Run Test
       run: |

post_office/__init__.py

@@ -1,11 +1,7 @@
-import django
 from ast import literal_eval
 from os.path import dirname, join
 
-with open(join(dirname(__file__), 'version.txt'), 'r') as fh:
+with open(join(dirname(__file__), "version.txt")) as fh:
     VERSION = literal_eval(fh.read())
 
 from .backends import EmailBackend
-
-if django.VERSION < (3, 2): # pragma: no cover
-    default_app_config = 'post_office.apps.PostOfficeConfig'

post_office/admin.py

@@ -17,13 +17,12 @@
 from django.utils.translation import gettext_lazy as _
 
 from .fields import CommaSeparatedEmailField
-from .mail import send
 from .models import STATUS, Attachment, Email, EmailTemplate, Log
 from .sanitizer import clean_html
 
 
 def get_message_preview(instance):
-    return ('{0}...'.format(instance.message[:25]) if len(instance.message) > 25
+    return (f'{instance.message[:25]}...' if len(instance.message) > 25
             else instance.message)
 
 

post_office/backends.py

@@ -2,7 +2,6 @@
 from email.mime.base import MIMEBase
 from django.core.files.base import ContentFile
 from django.core.mail.backends.base import BaseEmailBackend
-import quopri
 from .settings import get_default_priority
 
 class EmailBackend(BaseEmailBackend):

post_office/lockfile.py

@@ -44,7 +44,7 @@ def __init__(self, lock_filename, timeout=None, force=False):
     def get_lock_pid(self):
         try:
             return int(open(self.lock_filename).read())
-        except IOError:
+        except OSError:
             # If we can't read symbolic link, there are two possibilities:
             # 1. The symbolic link is dead (point to non existing file)
             # 2. Symbolic link is not there

post_office/mail.py

@@ -1,4 +1,3 @@
-import sys
 
 from django.conf import settings
 from django.core.exceptions import ValidationError
@@ -7,8 +6,7 @@
 from django.template import Context, Template
 from django.utils import timezone
 from email.utils import make_msgid
-from multiprocessing import Pool, TimeoutError
-from multiprocessing.context import TimeoutError as ContextTimeoutError
+from multiprocessing import Pool
 from multiprocessing.dummy import Pool as ThreadPool
 
 from .connections import connections

post_office/migrations/0002_add_i18n_and_backend_alias.py

@@ -81,6 +81,6 @@ class Migration(migrations.Migration):
         ),
         migrations.AlterUniqueTogether(
             name='emailtemplate',
-            unique_together=set([('language', 'default_template')]),
+            unique_together={('language', 'default_template')},
         ),
     ]

post_office/migrations/0005_auto_20170515_0013.py

@@ -11,6 +11,6 @@ class Migration(migrations.Migration):
     operations = [
         migrations.AlterUniqueTogether(
             name='emailtemplate',
-            unique_together=set([('name', 'language', 'default_template')]),
+            unique_together={('name', 'language', 'default_template')},
         ),
     ]

post_office/migrations/0010_message_id.py

@@ -14,7 +14,7 @@ def forwards(apps, schema_editor):
         if email.status in [STATUS.queued, STATUS.requeued]:
             # create a unique Message-ID for all emails which have not been send yet
             randint1, randint2 = random.getrandbits(64), random.getrandbits(16)
-            email.message_id = '<{}.{}.{}@{}>'.format(email.id, randint1, randint2, msg_id_fqdn)
+            email.message_id = f'<{email.id}.{randint1}.{randint2}@{msg_id_fqdn}>'
             email.save()
 
 

post_office/template/__init__.py

@@ -14,5 +14,5 @@ def render_to_string(template_name, context=None, request=None, using=None):
         template = get_template(template_name, using=using)
     try:
         return template.render(context, request), template.template._attached_images
-    except Exception as a:
+    except Exception:
         return template.render(context, request)

post_office/templatetags/post_office.py

@@ -23,7 +23,7 @@ def inline_image(context, file):
         try:
             absfilename = finders.find(file)
             if absfilename is None:
-                raise FileNotFoundError("No such file: {}".format(file))
+                raise FileNotFoundError(f"No such file: {file}")
         except Exception:
             if settings.DEBUG:
                 raise
@@ -33,6 +33,6 @@ def inline_image(context, file):
     image = MIMEImage(raw_data)
     md5sum = hashlib.md5(raw_data).hexdigest()
     image.add_header('Content-Disposition', 'inline', filename=md5sum)
-    image.add_header('Content-ID', '<{}>'.format(md5sum))
+    image.add_header('Content-ID', f'<{md5sum}>')
     context.template._attached_images.append(image)
-    return 'cid:{}'.format(md5sum)
+    return f'cid:{md5sum}'

post_office/tests/test_html_email.py

@@ -13,7 +13,7 @@
 from post_office.models import Email, EmailTemplate, STATUS
 from post_office.template import render_to_string
 from post_office.template.backends.post_office import PostOfficeTemplates
-from post_office.mail import create, send, send_queued
+from post_office.mail import send, send_queued
 
 
 class HTMLMailTest(TestCase):
@@ -165,7 +165,7 @@ def test_email_change_view(self):
         try:
             import bleach
             self.assertContains(response, "<h3>Testing image attachments</h3>")
-            self.assertContains(response, '<img src="{}" width="200"'.format(email_image_url))
+            self.assertContains(response, f'<img src="{email_image_url}" width="200"')
         except ImportError:
             self.assertContains(response, "Testing image attachments")
 

post_office/tests/test_mail.py

@@ -2,9 +2,9 @@
 import time
 from datetime import timedelta
 from multiprocessing.context import TimeoutError
-from unittest.mock import MagicMock, patch
+from unittest.mock import patch
+from zoneinfo import ZoneInfo
 
-import pytz
 from django.conf import settings
 from django.core import mail
 from django.core.exceptions import ValidationError
@@ -412,6 +412,7 @@ def test_send_bulk_with_faulty_template(self):
         email = Email.objects.get(id=email.id)
         self.assertEqual(email.status, STATUS.sent)
 
+    @override_settings(USE_TZ=False)
     def test_retry_failed(self):
         self.assertEqual(get_retry_timedelta(), timezone.timedelta(minutes=15))
         self.assertEqual(get_max_retries(), 2)
@@ -460,12 +461,12 @@ def test_retry_failed(self):
 
     @override_settings(USE_TZ=True)
     def test_expired(self):
-        tzinfo = pytz.timezone('Asia/Jakarta')
+        tzinfo = ZoneInfo('Asia/Jakarta')
         email = create('[email protected]', recipients=['[email protected]'], subject='subject', message='message',
                        expires_at=timezone.datetime(2020, 5, 18, 9, 0, 1, tzinfo=tzinfo))
         self.assertEqual(email.expires_at, timezone.datetime(2020, 5, 18, 9, 0, 1, tzinfo=tzinfo))
         msg = email.prepare_email_message()
-        self.assertEqual(msg.extra_headers['Expires'], 'Mon, 18 May 09:00:01 +0707')
+        self.assertEqual(msg.extra_headers['Expires'], 'Mon, 18 May 09:00:01 +0700')
 
         # check that email is not sent after its expire_at date
         with patch('django.utils.timezone.now', side_effect=lambda: timezone.datetime(2020, 5, 18, 9, 0, 2, tzinfo=tzinfo)):

post_office/tests/test_models.py

@@ -1,4 +1,3 @@
-import django
 import json
 import os
 

post_office/tests/test_utils.py

@@ -144,7 +144,7 @@ def test_create_attachments(self):
         self.assertTrue(attachments[0].pk)
         self.assertEqual(attachments[0].file.read(), b'content')
         self.assertTrue(attachments[0].name.startswith('attachment_file'))
-        self.assertEquals(attachments[0].mimetype, '')
+        self.assertEqual(attachments[0].mimetype, '')
 
     def test_create_attachments_with_mimetype(self):
         attachments = create_attachments({
@@ -161,9 +161,9 @@ def test_create_attachments_with_mimetype(self):
         self.assertEqual(len(attachments), 2)
         self.assertIsInstance(attachments[0], Attachment)
         self.assertTrue(attachments[0].pk)
-        self.assertEquals(attachments[0].file.read(), b'content')
+        self.assertEqual(attachments[0].file.read(), b'content')
         self.assertTrue(attachments[0].name.startswith('attachment_file'))
-        self.assertEquals(attachments[0].mimetype, 'text/plain')
+        self.assertEqual(attachments[0].mimetype, 'text/plain')
 
     def test_create_attachments_open_file(self):
         attachments = create_attachments({
@@ -174,8 +174,8 @@ def test_create_attachments_open_file(self):
         self.assertIsInstance(attachments[0], Attachment)
         self.assertTrue(attachments[0].pk)
         self.assertTrue(attachments[0].file.read())
-        self.assertEquals(attachments[0].name, 'attachment_file.py')
-        self.assertEquals(attachments[0].mimetype, '')
+        self.assertEqual(attachments[0].name, 'attachment_file.py')
+        self.assertEqual(attachments[0].mimetype, '')
 
     def test_parse_priority(self):
         self.assertEqual(parse_priority('now'), PRIORITY.now)

setup.py

@@ -27,7 +27,7 @@ def run_tests(self):
         sys.exit(errno)
 
 
-with open(join(dirname(__file__), 'post_office/version.txt'), 'r') as fh:
+with open(join(dirname(__file__), 'post_office/version.txt')) as fh:
     VERSION = '.'.join(map(str, literal_eval(fh.read())))
 
 TESTS_REQUIRE = ['tox >= 2.3']
@@ -47,25 +47,27 @@ def run_tests(self):
     zip_safe=False,
     include_package_data=True,
     package_data={'': ['README.rst']},
+    python_requires='>=3.9',
     install_requires=[
         'bleach[css]',
-        'django>=3.2',
-        'pytz',
+        'django>=4.2',
     ],
     classifiers=[
         'Development Status :: 5 - Production/Stable',
         'Environment :: Web Environment',
         'Framework :: Django',
+        'Framework :: Django :: 4.2',
+        'Framework :: Django :: 5.0',
         'Intended Audience :: Developers',
         'License :: OSI Approved :: MIT License',
         'Operating System :: OS Independent',
         'Programming Language :: Python',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3 :: Only',
-        'Programming Language :: Python :: 3.7',
-        'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
+        'Programming Language :: Python :: 3.12',
         'Topic :: Communications :: Email',
         'Topic :: Internet :: WWW/HTTP',
         'Topic :: Software Development :: Libraries :: Python Modules',