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docs/conf.py

@@ -13,8 +13,8 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-import sys
 import os
+import sys
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -188,9 +188,11 @@
 
 # -- Options for autodoc -------------------------------------------------
 
-autodoc_mock_imports = ['ctypes.wintypes']
+autodoc_mock_imports = ["ctypes.wintypes"]
 
 # Need to mock this out specifically to avoid errors
+
+
 import ctypes
 def pointer_mock(*args, **kwargs):
     try:

src/dateutil/parser/_parser.py

@@ -872,7 +872,7 @@ def _parse_numeric_token(self, tokens, idx, info, ymd, res, fuzzy):
         try:
             value = self._to_decimal(value_repr)
         except Exception as e:
-            raise ValueError('Unknown numeric token') from e
+            raise ValueError("Unknown numeric token") from e
 
         len_li = len(value_repr)
 

src/dateutil/rrule.py

@@ -5,6 +5,7 @@
 `iCalendar RFC <https://tools.ietf.org/html/rfc5545>`_,
 including support for caching of results.
 """
+import _thread
 import calendar
 import datetime
 import heapq
@@ -14,7 +15,6 @@
 from functools import wraps
 # For warning about deprecation of until and count
 from warnings import warn
-import _thread
 
 from ._common import weekday as weekdaybase
 

src/dateutil/tz/_common.py

@@ -5,7 +5,7 @@
 
 ZERO = timedelta(0)
 
-__all__ = ['enfold']
+__all__ = ["enfold"]
 
 
 # The following is adapted from Alexander Belopolsky's tz library

src/dateutil/tz/_factories.py

@@ -1,7 +1,7 @@
-from datetime import timedelta
+import _thread
 import weakref
 from collections import OrderedDict
-import _thread
+from datetime import timedelta
 
 
 class _TzSingleton(type):

src/dateutil/tz/tz.py

@@ -7,22 +7,19 @@
 from relative deltas), local machine timezone, fixed offset timezone, and UTC
 timezone.
 """
+import _thread
+import bisect
 import datetime
+import os
 import struct
-import time
 import sys
-import os
-import bisect
+import time
 import weakref
 from collections import OrderedDict
-import _thread
 
-from ._common import _tzinfo
-from ._common import tzrangebase, enfold
-from ._common import _validate_fromutc_inputs
+from ._common import _tzinfo, _validate_fromutc_inputs, enfold, tzrangebase
+from ._factories import _TzOffsetFactory, _TzSingleton, _TzStrFactory
 
-from ._factories import _TzSingleton, _TzOffsetFactory
-from ._factories import _TzStrFactory
 try:
     from .win import tzwin, tzwinlocal
 except ImportError:
@@ -1636,7 +1633,7 @@ def nocache(name=None):
                         if tzwin is not None:
                             try:
                                 tz = tzwin(name)
-                            except (WindowsError):
+                            except WindowsError:
                                 tz = None
 
                         if not tz:

src/dateutil/tz/win.py

@@ -280,8 +280,9 @@ def __init__(self):
             self._dst_abbr = keydict["DaylightName"]
 
             try:
-                tzkeyname = str('{kn}\\{sn}').format(kn=TZKEYNAME,
-                                                     sn=self._std_abbr)
+                tzkeyname = "'{kn}\\{sn}'".format(
+                    kn=TZKEYNAME, sn=self._std_abbr
+                )
                 with winreg.OpenKey(handle, tzkeyname) as tzkey:
                     _keydict = valuestodict(tzkey)
                     self._display = _keydict["Display"]

tests/test_imports.py

@@ -1,5 +1,6 @@
 import sys
 import unittest
+
 import pytest
 
 MODULE_TYPE = type(sys)
@@ -45,7 +46,9 @@ def clean_import():
 def test_lazy_import(clean_import, module):
     """Test that dateutil.[submodule] works for py version > 3.7"""
 
-    import dateutil, importlib
+    import importlib
+
+    import dateutil
 
     if sys.version_info < (3, 7):
         pytest.xfail("Lazy loading does not work for Python < 3.7")
@@ -93,12 +96,8 @@ def test_import_parser_from():
 
 
 def test_import_parser_all():
-    # All interface
-    from dateutil.parser import parse
-    from dateutil.parser import parserinfo
-
-    # Other public classes
-    from dateutil.parser import parser
+    # Interfaces and public classes
+    from dateutil.parser import parse, parser, parserinfo
 
     for var in (parse, parserinfo, parser):
         assert var is not None
@@ -114,7 +113,8 @@ def test_import_relative_delta_from():
 
 def test_import_relative_delta_all():
     from dateutil.relativedelta import relativedelta
-    from dateutil.relativedelta import MO, TU, WE, TH, FR, SA, SU
+
+    from dateutil.relativedelta import MO, TU, WE, TH, FR, SA, SU  # isort:skip
 
     for var in (relativedelta, MO, TU, WE, TH, FR, SA, SU):
         assert var is not None
@@ -134,12 +134,11 @@ def test_import_rrule_from():
 
 
 def test_import_rrule_all():
-    from dateutil.rrule import rrule
-    from dateutil.rrule import rruleset
-    from dateutil.rrule import rrulestr
-    from dateutil.rrule import YEARLY, MONTHLY, WEEKLY, DAILY
-    from dateutil.rrule import HOURLY, MINUTELY, SECONDLY
-    from dateutil.rrule import MO, TU, WE, TH, FR, SA, SU
+    from dateutil.rrule import rrule, rruleset, rrulestr
+
+    from dateutil.rrule import YEARLY, MONTHLY, WEEKLY, DAILY  # isort:skip
+    from dateutil.rrule import HOURLY, MINUTELY, SECONDLY  # isort:skip
+    from dateutil.rrule import MO, TU, WE, TH, FR, SA, SU  # isort:skip
 
     rr_all = (rrule, rruleset, rrulestr,
               YEARLY, MONTHLY, WEEKLY, DAILY,
@@ -164,20 +163,22 @@ def test_import_tz_from():
 
 
 def test_import_tz_all():
-    from dateutil.tz import tzutc
-    from dateutil.tz import tzoffset
-    from dateutil.tz import tzlocal
-    from dateutil.tz import tzfile
-    from dateutil.tz import tzrange
-    from dateutil.tz import tzstr
-    from dateutil.tz import tzical
-    from dateutil.tz import gettz
-    from dateutil.tz import tzwin
-    from dateutil.tz import tzwinlocal
-    from dateutil.tz import UTC
-    from dateutil.tz import datetime_ambiguous
-    from dateutil.tz import datetime_exists
-    from dateutil.tz import resolve_imaginary
+    from dateutil.tz import (
+        UTC,
+        datetime_ambiguous,
+        datetime_exists,
+        gettz,
+        resolve_imaginary,
+        tzfile,
+        tzical,
+        tzlocal,
+        tzoffset,
+        tzrange,
+        tzstr,
+        tzutc,
+        tzwin,
+        tzwinlocal,
+    )
 
     tz_all = ["tzutc", "tzoffset", "tzlocal", "tzfile", "tzrange",
               "tzstr", "tzical", "gettz", "datetime_ambiguous",
@@ -202,8 +203,7 @@ def test_import_tz_windows_from():
 
 @pytest.mark.skipif(not HOST_IS_WINDOWS, reason="Requires Windows")
 def test_import_tz_windows_star():
-    from dateutil.tzwin import tzwin
-    from dateutil.tzwin import tzwinlocal
+    from dateutil.tzwin import tzwin, tzwinlocal
 
     tzwin_all = [tzwin, tzwinlocal]
 
@@ -221,9 +221,7 @@ def test_import_zone_info_from():
 
 
 def test_import_zone_info_star():
-    from dateutil.zoneinfo import gettz
-    from dateutil.zoneinfo import gettz_db_metadata
-    from dateutil.zoneinfo import rebuild
+    from dateutil.zoneinfo import gettz, gettz_db_metadata, rebuild
 
     zi_all = (gettz, gettz_db_metadata, rebuild)
 

tests/test_parser.py

@@ -1,22 +1,25 @@
 # -*- coding: utf-8 -*-
 
 import itertools
-from datetime import datetime, timedelta
-import unittest
 import sys
+import unittest
+from datetime import datetime, timedelta
+from io import StringIO
+
+import pytest
 
 from dateutil import tz
+from dateutil.parser import (
+    ParserError,
+    UnknownTimezoneWarning,
+    parse,
+    parserinfo,
+)
+
 from dateutil.tz import tzoffset
-from dateutil.parser import parse, parserinfo
-from dateutil.parser import ParserError
-from dateutil.parser import UnknownTimezoneWarning
 
 from ._common import TZEnvContext
 
-from io import StringIO
-
-import pytest
-
 # Platform info
 IS_WIN = sys.platform.startswith('win')
 
@@ -558,12 +561,27 @@ def testErrorType01(self):
             parse('shouldfail')
 
     def testCorrectErrorOnFuzzyWithTokens(self):
-        self.assertRaisesRegex(ParserError, 'Unknown string format',
-                               parse, '04/04/32/423', fuzzy_with_tokens=True)
-        self.assertRaisesRegex(ParserError, 'Unknown string format',
-                               parse, '04/04/04 +32423', fuzzy_with_tokens=True)
-        self.assertRaisesRegex(ParserError, 'Unknown string format',
-                               parse, '04/04/0d4', fuzzy_with_tokens=True)
+        self.assertRaisesRegex(
+            ParserError,
+            "Unknown string format",
+            parse,
+            "04/04/32/423",
+            fuzzy_with_tokens=True,
+        )
+        self.assertRaisesRegex(
+            ParserError,
+            "Unknown string format",
+            parse,
+            "04/04/04 +32423",
+            fuzzy_with_tokens=True,
+        )
+        self.assertRaisesRegex(
+            ParserError,
+            "Unknown string format",
+            parse,
+            "04/04/0d4",
+            fuzzy_with_tokens=True,
+        )
 
     def testIncreasingCTime(self):
         # This test will check 200 different years, every month, every day,
@@ -602,7 +620,7 @@ def testMicrosecondPrecisionErrorReturns(self):
 
     def testCustomParserInfo(self):
         # Custom parser info wasn't working, as Michael Elsdörfer discovered.
-        from dateutil.parser import parserinfo, parser
+        from dateutil.parser import parser, parserinfo
 
         class myparserinfo(parserinfo):
             MONTHS = parserinfo.MONTHS[:]
@@ -615,7 +633,7 @@ def testCustomParserShortDaynames(self):
         # Horacio Hoyos discovered that day names shorter than 3 characters,
         # for example two letter German day name abbreviations, don't work:
         # https://github.com/dateutil/dateutil/issues/343
-        from dateutil.parser import parserinfo, parser
+        from dateutil.parser import parser, parserinfo
 
         class GermanParserInfo(parserinfo):
             WEEKDAYS = [("Mo", "Montag"),

updatezinfo.py

@@ -1,10 +1,10 @@
 #!/usr/bin/env python
-import os
 import hashlib
-import json
 import io
-from urllib import request
+import json
+import os
 from urllib import error as urllib_error
+from urllib import request
 
 try:
     import dateutil