[REM] core: remove mutable default for parameters

Part-of: odoo/odoo#83687

odoo/addons/base/models/res_users.py

@@ -1400,7 +1400,9 @@ class UsersView(models.Model):
         return res
 
     @api.model
-    def new(self, values={}, origin=None, ref=None):
+    def new(self, values=None, origin=None, ref=None):
+        if values is None:
+            values = {}
         values = self._remove_reified_groups(values)
         user = super().new(values=values, origin=origin, ref=ref)
         group_multi_company = self.env.ref('base.group_multi_company', False)

odoo/models.py

@@ -5727,7 +5727,7 @@ Fields:
     #
 
     @api.model
-    def new(self, values={}, origin=None, ref=None):
+    def new(self, values=None, origin=None, ref=None):
         """ new([values], [origin], [ref]) -> record
 
         Return a new record instance attached to the current environment and
@@ -5741,6 +5741,8 @@ Fields:
         One can also pass a ``ref`` value to identify the record among other new
         records. The reference is encapsulated in the ``id`` of the record.
         """
+        if values is None:
+            values = {}
         if origin is not None:
             origin = origin.id
         record = self.browse([NewId(origin, ref)])