diff --git a/dynamicserialize/dstypes/com/raytheon/uf/common/dataquery/requests/RequestConstraint.py b/dynamicserialize/dstypes/com/raytheon/uf/common/dataquery/requests/RequestConstraint.py
index be67109..6e228e5 100644
--- a/dynamicserialize/dstypes/com/raytheon/uf/common/dataquery/requests/RequestConstraint.py
+++ b/dynamicserialize/dstypes/com/raytheon/uf/common/dataquery/requests/RequestConstraint.py
@@ -27,11 +27,11 @@
 #     Jun 27, 2016    5725          tgurney        Add NOT IN
 #     Jul 22, 2016    2416          tgurney        Add evaluate()
 #     Jun 26, 2019    7888          tgurney        Python 3 fixes
-#
+#     Aug 31, 2023                  srcarter@ucar  Small formatting and logic changes
 #
 
 import re
-from ...time import DataTime
+from dynamicserialize.dstypes.com.raytheon.uf.common.time import DataTime
 
 
 class RequestConstraint(object):
@@ -212,7 +212,7 @@ class RequestConstraint(object):
         return self._evalValue.match(value) is not None
 
     def _evalIsNull(self, value):
-        return value is None or 'null' == value
+        return value is None or value == 'null'
 
     # DAF-specific stuff begins here ##########################################
 
@@ -228,11 +228,11 @@ class RequestConstraint(object):
 
     @staticmethod
     def _stringify(value):
-        if type(value) in {int, bool, float}:
+        if isinstance(value, (int, bool, float)):
             return str(value)
-        elif type(value) is str:
+        elif isinstance(value, str):
             return value
-        elif type(value) is bytes:
+        elif isinstance(value, bytes):
             return value.decode()
         else:
             # Collections are not allowed; they are handled separately.
@@ -249,7 +249,7 @@ class RequestConstraint(object):
         except TypeError:
             raise TypeError("value for IN / NOT IN constraint must be an iterable")
         stringValue = ', '.join(cls._stringify(item) for item in iterator)
-        if len(stringValue) == 0:
+        if not stringValue:
             raise ValueError('cannot use IN / NOT IN with empty collection')
         obj = cls()
         obj.setConstraintType(constraintType)
diff --git a/dynamicserialize/dstypes/com/raytheon/uf/common/time/DataTime.py b/dynamicserialize/dstypes/com/raytheon/uf/common/time/DataTime.py
index 4b401e7..70eb10e 100644
--- a/dynamicserialize/dstypes/com/raytheon/uf/common/time/DataTime.py
+++ b/dynamicserialize/dstypes/com/raytheon/uf/common/time/DataTime.py
@@ -39,6 +39,7 @@
 #                                                 plus misc cleanup
 #    09/13/19         7888         tgurney        Python 3 division fixes
 #    11/18/19         7881         tgurney        Fix __hash__
+#    08/31/23                      srcarter@ucar  Small formatting fixes to match MJ's changes
 
 
 import calendar
@@ -59,12 +60,8 @@ _TIME = r'(\d{2}:\d{2}:\d{2})'
 _MILLIS = '(?:\.(\d{1,3})(?:\d{1,4})?)?'
 REFTIME_PATTERN_STR = _DATE + '[ _]' + _TIME + _MILLIS
 FORECAST_PATTERN_STR = r'(?:[ _]\((\d+)(?::(\d{1,2}))?\))?'
-VALID_PERIOD_PATTERN_STR = r'(?:\[' + REFTIME_PATTERN_STR + \
-    '--' + REFTIME_PATTERN_STR + r'\])?'
-STR_PATTERN = re.compile(
-    REFTIME_PATTERN_STR +
-    FORECAST_PATTERN_STR +
-    VALID_PERIOD_PATTERN_STR)
+VALID_PERIOD_PATTERN_STR = r'(?:\[' + REFTIME_PATTERN_STR + '--' + REFTIME_PATTERN_STR + r'\])?'
+STR_PATTERN = re.compile(REFTIME_PATTERN_STR + FORECAST_PATTERN_STR + VALID_PERIOD_PATTERN_STR)
 
 
 class DataTime(object):
@@ -88,18 +85,14 @@ class DataTime(object):
             self.fcstTime = 0
         self.refTime = refTime
         if validPeriod is not None and not isinstance(validPeriod, TimeRange):
-            raise ValueError(
-                "Invalid validPeriod object specified for DataTime.")
+            raise ValueError("Invalid validPeriod object specified for DataTime.")
         self.validPeriod = validPeriod
-        self.utilityFlags = EnumSet(
-            'com.raytheon.uf.common.time.DataTime$FLAG')
+        self.utilityFlags = EnumSet('com.raytheon.uf.common.time.DataTime$FLAG')
         self.levelValue = numpy.float64(-1.0)
 
         if self.refTime is not None:
             if isinstance(self.refTime, datetime.datetime):
-                self.refTime = int(
-                    calendar.timegm(
-                        self.refTime.utctimetuple()) * 1000)
+                self.refTime = int(calendar.timegm(self.refTime.utctimetuple()) * 1000)
             elif isinstance(self.refTime, time.struct_time):
                 self.refTime = int(calendar.timegm(self.refTime) * 1000)
             elif hasattr(self.refTime, 'getTime'):
@@ -124,8 +117,7 @@ class DataTime(object):
                     fcstTimeMin = groups[4]
                     periodStart = groups[5], groups[6], (groups[7] or 0)
                     periodEnd = groups[8], groups[9], (groups[10] or 0)
-                    self.refTime = self._getTimeAsEpochMillis(
-                        rDate, rTime, rMillis)
+                    self.refTime = self._getTimeAsEpochMillis(rDate, rTime, rMillis)
 
                     if fcstTimeHr is not None:
                         self.fcstTime = int(fcstTimeHr) * 3600
@@ -134,8 +126,7 @@ class DataTime(object):
 
                     if periodStart[0] is not None:
                         self.validPeriod = TimeRange()
-                        periodStartTime = self._getTimeAsEpochMillis(
-                            *periodStart)
+                        periodStartTime = self._getTimeAsEpochMillis(*periodStart)
                         self.validPeriod.setStart(periodStartTime // 1000)
                         periodEndTime = self._getTimeAsEpochMillis(*periodEnd)
                         self.validPeriod.setEnd(periodEndTime // 1000)