Merge pull request #263 from MetRonnie/sre_constants

Remove deprecated `sre_constants` usage

metomi/isodatetime/parsers.py

@@ -19,7 +19,6 @@
 """This provides ISO 8601 parsing functionality."""
 
 import re
-import sre_constants
 
 from . import data
 from . import parser_spec
@@ -338,12 +337,13 @@ def strptime(self, strptime_data_string, strptime_format_string,
             regex, strptime_data_string,
             dump_format=dump_format, source=strptime_format_string)
 
-    def _parse_from_custom_regex(self, regex, data_string, dump_format=None,
-                                 source=None):
+    def _parse_from_custom_regex(
+        self, regex, data_string, dump_format=None, source=None
+    ):
         """Parse data_string according to the regular expression in regex."""
         try:
             compiled_regex = re.compile(regex)
-        except sre_constants.error:
+        except Exception:
             raise StrptimeConversionError(source, regex)
         result = compiled_regex.match(data_string)
         if not result:

metomi/isodatetime/tests/conftest.py

@@ -13,10 +13,13 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-import pytest
 import time
 from unittest.mock import Mock
 
+import pytest
+
+from metomi.isodatetime.parsers import TimePointParser
+
 
 @pytest.fixture
 def mock_local_time_zone(monkeypatch: pytest.MonkeyPatch):
@@ -39,3 +42,12 @@ def _mock_local_time_zone(seconds: int, dst_seconds: int = 0) -> None:
         mock_time.localtime.return_value = Mock(tm_isdst=is_dst)
         monkeypatch.setattr('metomi.isodatetime.timezone.time', mock_time)
     return _mock_local_time_zone
+
+
+@pytest.fixture(scope='session')
+def tp_parser():
+    """Returns a TimePointParser instance for the session.
+
+    This saves time by only creating the parser once for the entire session.
+    """
+    return TimePointParser()

metomi/isodatetime/tests/test_00.py

@@ -19,14 +19,21 @@
 import datetime
 from itertools import chain
 import unittest
+
 import pytest
 
-from metomi.isodatetime import data
-from metomi.isodatetime import dumpers
-from metomi.isodatetime import parsers
-from metomi.isodatetime import parser_spec
+from metomi.isodatetime import (
+    data,
+    dumpers,
+    parser_spec,
+    parsers,
+)
 from metomi.isodatetime.exceptions import (
-    ISO8601SyntaxError, TimePointDumperBoundsError, BadInputError)
+    BadInputError,
+    ISO8601SyntaxError,
+    StrptimeConversionError,
+    TimePointDumperBoundsError,
+)
 
 
 def get_timedurationparser_tests():
@@ -1523,5 +1530,6 @@ def test_timepoint_dump_format(self):
         # QUESTION: What was this test meant to do exactly?
 
 
-if __name__ == '__main__':
-    unittest.main()
+def test_strptime_bad(tp_parser: parsers.TimePointParser):
+    with pytest.raises(StrptimeConversionError):
+        tp_parser.strptime("2020-01-01", "]")