diff --git a/util/locale_database/cldr.py b/util/locale_database/cldr.py
index 8a3ffd04341..9e0bae96677 100644
--- a/util/locale_database/cldr.py
+++ b/util/locale_database/cldr.py
@@ -75,9 +75,8 @@ class CldrReader (object):
             pass # self.__wrapped(self.whitter, 'Skipping likelySubtags (for unknown codes): ', skips)
 
     def readLocales(self, calendars = ('gregorian',)):
-        locales = tuple(self.__allLocales(calendars))
-        return dict(((k.language_id, k.script_id, k.territory_id, k.variant_code),
-                     k) for k in locales)
+        return {(k.language_id, k.script_id, k.territory_id, k.variant_code): k
+                for k in self.__allLocales(calendars)}
 
     def __allLocales(self, calendars):
         def skip(locale, reason):
@@ -381,9 +380,9 @@ class CldrAccess (object):
             for f in k.split('_'):
                 scraps.add(f)
         from enumdata import language_map, territory_map, script_map
-        language = dict((v, k) for k, v in language_map.values() if not v.isspace())
-        territory = dict((v, k) for k, v in territory_map.values() if v != 'ZZ')
-        script = dict((v, k) for k, v in script_map.values() if v != 'Zzzz')
+        language = {v: k for k, v in language_map.values() if not v.isspace()}
+        territory = {v: k for k, v in territory_map.values() if v != 'ZZ'}
+        script = {v: k for k, v in script_map.values() if v != 'Zzzz'}
         lang = dict(self.__checkEnum(language, self.__codeMap('language'), scraps))
         land = dict(self.__checkEnum(territory, self.__codeMap('territory'), scraps))
         text = dict(self.__checkEnum(script, self.__codeMap('script'), scraps))
diff --git a/util/locale_database/qlocalexml.py b/util/locale_database/qlocalexml.py
index 9cb1f63f8b6..45854be5383 100644
--- a/util/locale_database/qlocalexml.py
+++ b/util/locale_database/qlocalexml.py
@@ -109,14 +109,14 @@ class QLocaleXmlReader (object):
         self.__likely = tuple(self.__likelySubtagsMap())
 
         # Mappings {ID: (enum name, code, en.xml name)}
-        self.languages = dict((v[0], v[1:]) for v in languages)
-        self.scripts = dict((v[0], v[1:]) for v in scripts)
-        self.territories = dict((v[0], v[1:]) for v in territories)
+        self.languages = {v[0]: v[1:] for v in languages}
+        self.scripts = {v[0]: v[1:] for v in scripts}
+        self.territories = {v[0]: v[1:] for v in territories}
 
         # Private mappings {enum name: (ID, code)}
-        self.__langByName = dict((v[1], (v[0], v[2])) for v in languages)
-        self.__textByName = dict((v[1], (v[0], v[2])) for v in scripts)
-        self.__landByName = dict((v[1], (v[0], v[2])) for v in territories)
+        self.__langByName = {v[1]: (v[0], v[2]) for v in languages}
+        self.__textByName = {v[1]: (v[0], v[2]) for v in scripts}
+        self.__landByName = {v[1]: (v[0], v[2]) for v in territories}
         # Other properties:
         self.__dupes = set(v[1] for v in languages) & set(v[1] for v in territories)
         self.cldrVersion = self.__firstChildText(self.root, "version")
@@ -527,7 +527,7 @@ class Locale (object):
             data['listDelim' if k == 'list' else k] = lookup(k)
 
         for k in cls.propsMonthDay('months'):
-            data[k] = dict((cal, lookup('_'.join((k, cal)))) for cal in calendars)
+            data[k] = {cal: lookup('_'.join((k, cal))) for cal in calendars}
 
         grouping = lookup('groupSizes').split(';')
         data.update(groupLeast = int(grouping[0]),