Remove imports/adjustments to make NAV run on Python<3.9/Django<3.2

changelog.d/+drop-py37-code-changes.changed.md

@@ -0,0 +1 @@
+Change Python code due to dropping Python 3.7

python/nav/alertengine/base.py

@@ -22,10 +22,10 @@
 import gc
 import logging
 from datetime import datetime, timedelta
+from functools import lru_cache
 
 from django.db import transaction, reset_queries
 
-from nav.compatibility import lru_cache
 from nav.models.profiles import (
     Account,
     AccountAlertQueue,

python/nav/buildconf.py

@@ -1,13 +1,10 @@
 """NAV build configuration variables."""
+
 # pylint: disable=invalid-name
+from importlib import metadata
 import os
 import sysconfig
 
-try:
-    from importlib import metadata as _impmeta
-except ImportError:
-    import importlib_metadata as _impmeta
-
 
 datadir = os.path.join(sysconfig.get_config_var('datarootdir'), 'nav')
 localstatedir = os.path.join(datadir, 'var')
@@ -17,8 +14,8 @@
 
 
 try:
-    VERSION = _impmeta.version("nav")
-except _impmeta.PackageNotFoundError:
+    VERSION = metadata.version("nav")
+except metadata.PackageNotFoundError:
     # If we're not installed, try to get the current version from Git tags
     import setuptools_scm
 

python/nav/eventengine/__init__.py

@@ -15,10 +15,7 @@
 #
 """NAV eventengine"""
 
-try:
-    from subprocess32 import STDOUT, check_output, TimeoutExpired, CalledProcessError
-except ImportError:
-    from subprocess import STDOUT, check_output, TimeoutExpired, CalledProcessError
+from subprocess import STDOUT, check_output, TimeoutExpired, CalledProcessError
 
 
 def get_eventengine_output(timeout=10):

python/nav/eventengine/export.py

@@ -17,13 +17,10 @@
 """Alert stream export functionality"""
 import logging
 import json
+import subprocess
 
 from django.core.serializers.json import DjangoJSONEncoder
 
-try:
-    import subprocess32 as subprocess
-except ImportError:
-    import subprocess
 
 from nav.web.api.v1.alert_serializers import AlertQueueSerializer
 

python/nav/logs.py

@@ -125,7 +125,6 @@ def _get_logging_conf():
     """
     filename = os.environ.get(LOGGING_CONF_VAR, LOGGING_CONF_FILE_DEFAULT)
     config = configparser.ConfigParser()
-    # Warning about `bytes` on py 3.5, fixed in py 3.7. Do not change
     read = config.read(filename)
     if filename not in read and LOGGING_CONF_VAR in os.environ:
         _logger.error(

python/nav/metrics/lookup.py

@@ -16,9 +16,9 @@
 #
 """Functions for reverse-mapping metric names to NAV objects"""
 
+from functools import lru_cache
 import re
 
-from nav.compatibility import lru_cache
 from nav.models.manage import Netbox, Interface, Prefix, Sensor
 
 

python/nav/models/api.py

@@ -17,10 +17,10 @@
 
 from datetime import datetime
 
+from django.contrib.postgres.fields import HStoreField
 from django.db import models
 from django.urls import reverse
 
-from nav.adapters import HStoreField
 from nav.models.fields import VarcharField
 from nav.models.profiles import Account
 

python/nav/models/manage.py

@@ -32,14 +32,14 @@
 
 import IPy
 from django.conf import settings
+from django.contrib.postgres.fields import HStoreField
 from django.core.exceptions import ValidationError
 from django.db import models
 from django.db.models import JSONField, Q
 from django.db.models.expressions import RawSQL
 from django.urls import reverse
 
 from nav import util
-from nav.adapters import HStoreField
 from nav.bitvector import BitVector
 from nav.metrics.data import get_netboxes_availability
 from nav.metrics.graphs import get_simple_graph_url, Graph

python/nav/models/profiles.py

@@ -26,12 +26,12 @@
 import re
 import json
 
-from django.views.decorators.debug import sensitive_variables
+from django.contrib.postgres.fields import HStoreField
 from django.db import models, transaction
-from django.urls import reverse
 from django.forms.models import model_to_dict
+from django.urls import reverse
+from django.views.decorators.debug import sensitive_variables
 
-from nav.adapters import HStoreField
 import nav.buildconf
 import nav.pwhash
 from nav.config import getconfig as get_alertengine_config

python/nav/statemon/abstractchecker.py

@@ -111,24 +111,11 @@ def run(self):
         service = "%s:%s" % (self.sysname, self.get_type())
         _logger.info("%-20s -> %s", service, info)
 
-        if status == event.Event.UP:
-            # Dirty hack to check if we timed out...
-            # this is needed as ssl-socket calls may hang
-            # in python < 2.3
-            if self.response_time > 2 * self.timeout:
-                _logger.info(
-                    "Adjusting status due to high responsetime (%s, " "%s)",
-                    service,
-                    self.response_time,
-                )
-                status = event.Event.DOWN
-                self.response_time = 2 * self.timeout
-
         if status != self.status and (self.runcount < int(self._conf.get('retry', 3))):
             delay = int(self._conf.get('retry delay', 5))
             self.runcount += 1
             _logger.info(
-                "%-20s -> State changed. New check in %i sec. (%s, " "%s)",
+                "%-20s -> State changed. New check in %i sec. (%s, %s)",
                 service,
                 delay,
                 status,

python/nav/statemon/db.py

@@ -23,16 +23,12 @@
 """
 from __future__ import absolute_import
 
-import threading
-
-try:
-    import queue
-except ImportError:
-    import Queue as queue
-import time
 import atexit
 from collections import defaultdict
 import logging
+import queue
+import time
+import threading
 
 import psycopg2
 from psycopg2.errorcodes import IN_FAILED_SQL_TRANSACTION

python/nav/util.py

@@ -24,17 +24,13 @@
 import uuid
 import hashlib
 from functools import wraps
+from importlib.resources import as_file, files as resource_files
 from itertools import chain, tee, groupby, islice
 from operator import itemgetter
 from secrets import token_hex
 
 import IPy
 
-try:
-    from importlib.resources import as_file, files as resource_files
-except ImportError:  # Python 3.7!
-    from importlib_resources import as_file, files as resource_files
-
 
 def gradient(start, stop, steps):
     """Create and return a sequence of steps representing an integer

python/nav/web/ipdevinfo/host_information.py

@@ -15,10 +15,10 @@
 #
 """Provides a function for getting host information"""
 
+from functools import lru_cache
 
 import IPy
 from nav import asyncdns
-from nav.compatibility import lru_cache
 
 from nav.util import is_valid_ip
 

python/nav/web/sortedstats/views.py

@@ -17,11 +17,7 @@
 
 import logging
 from datetime import datetime
-
-try:
-    from zoneinfo import ZoneInfo
-except ImportError:
-    from backports.zoneinfo import ZoneInfo
+from zoneinfo import ZoneInfo
 
 from django.shortcuts import render
 from django.core.cache import caches

tests/integration/auditlog_test.py

@@ -19,19 +19,16 @@ def test_str(self):
         l.delete()
 
     def test_add_log_entry_bad_template(self):
-        LogEntry.add_log_entry(
-            self.justification, u'bad template test', u'this is a {bad} template'
-        )
-        l = LogEntry.objects.filter(verb='bad template test').get()
-        self.assertEqual(l.summary, u'Error creating summary - see error log')
-        l.delete()
-
-    #         # When on python3:
-    #         with self.assertLogs(level='ERROR') as log:
-    #             # run body
-    #             self.assertEqual(len(log.output), 1)
-    #             self.assertEqual(len(log.records), 1)
-    #             self.assertIn('KeyError when creating summary:', log.output[0])
+        with self.assertLogs(level='ERROR') as log:
+            LogEntry.add_log_entry(
+                self.justification, u'bad template test', u'this is a {bad} template'
+            )
+            l = LogEntry.objects.filter(verb='bad template test').get()
+            self.assertEqual(l.summary, u'Error creating summary - see error log')
+            l.delete()
+            self.assertEqual(len(log.output), 1)
+            self.assertEqual(len(log.records), 1)
+            self.assertIn('KeyError when creating summary:', log.output[0])
 
     def test_add_log_entry_actor_only(self):
         LogEntry.add_log_entry(

tests/integration/pping_test.py

@@ -1,15 +1,11 @@
 """
 various pping integration tests
 """
+
 import os
-from pathlib import Path
 import getpass
 from shutil import which
-
-try:
-    from subprocess32 import STDOUT, check_output, TimeoutExpired, CalledProcessError
-except ImportError:
-    from subprocess import STDOUT, check_output, TimeoutExpired, CalledProcessError
+from subprocess import STDOUT, check_output, CalledProcessError
 
 import pytest
 

tests/integration/smsd_test.py

@@ -1,16 +1,12 @@
 """
 smsd integration tests
 """
+
 import os
 import os.path
-
-try:
-    from subprocess32 import STDOUT, check_output, TimeoutExpired, CalledProcessError
-except ImportError:
-    from subprocess import STDOUT, check_output, TimeoutExpired, CalledProcessError
+from subprocess import STDOUT, check_output, TimeoutExpired, CalledProcessError
 
 import pytest
-from mock import Mock, patch
 
 from nav.config import find_config_file, find_config_dir
 

tests/integration/web/crawler_test.py

@@ -13,17 +13,14 @@
 URLs that report a Content-Type of text/html.
 
 """
+
 from __future__ import print_function
 
 from collections import namedtuple
+from http.client import BadStatusLine
 from lxml.html import fromstring
 import os
 
-try:
-    from http.client import BadStatusLine
-except ImportError:
-    from httplib import BadStatusLine
-
 import pytest
 
 from tidylib import tidy_document

tests/unittests/general/config_test.py

@@ -14,16 +14,12 @@
 #
 
 from __future__ import unicode_literals
+from io import StringIO
 from os import makedirs, remove, rmdir, listdir
 from os.path import join
 
 import pytest
 
-try:
-    from io import StringIO
-except ImportError:
-    from StringIO import StringIO
-
 from nav import config