Make PyLint happy with the models code

calsocial/models.py

@@ -115,6 +115,11 @@ class User(db.Model, UserMixin):
 
     @property
     def timezone(self):
+        """The user’s time zone
+
+        If the user didn’t set a time zone yet, the application default is used.
+        """
+
         from flask import current_app
         from pytz import timezone
         from pytz.exceptions import UnknownTimeZoneError
@@ -204,9 +209,9 @@ class Event(db.Model):
     description = db.Column(db.UnicodeText())
 
     def __as_tz(self, timestamp, as_timezone=None):
-        from pytz import timezone, UTC
+        from pytz import timezone, utc
 
-        utc_timestamp = UTC.localize(timestamp)
+        utc_timestamp = utc.localize(dt=timestamp)
 
         return utc_timestamp.astimezone(as_timezone or timezone(self.time_zone))
 
@@ -240,7 +245,7 @@ class Event(db.Model):
         return f'<Event {self.id} ({self.title}) of {self.user}>'
 
 
-class UserSetting(db.Model):
+class UserSetting(db.Model):  # pylint: disable=too-few-public-methods
     """Database model for user settings
     """