1 files changed, 15 insertions, 15 deletions
diff --git a/vk/tracking/db/timestamp.py b/vk/tracking/db/timestamp.py
index 0881fb3..b2219ca 100644
--- a/vk/tracking/db/timestamp.py
+++ b/vk/tracking/db/timestamp.py
@@ -11,25 +11,25 @@ class Timestamp:
         return datetime.utcnow()
 
     @staticmethod
-    def _is_timezone_aware(impl):
-        return impl.tzinfo is not None and impl.tzinfo.utcoffset(impl) is not None
+    def _is_timezone_aware(dt):
+        return dt.tzinfo is not None and dt.tzinfo.utcoffset(dt) is not None
 
     @staticmethod
-    def _lose_timezone(impl):
-        if Timestamp._is_timezone_aware(impl):
-            return impl.astimezone(timezone.utc).replace(tzinfo=None)
-        return impl
+    def _lose_timezone(dt):
+        if Timestamp._is_timezone_aware(dt):
+            return dt.astimezone(timezone.utc).replace(tzinfo=None)
+        return dt
 
-    def __init__(self, impl=None):
-        if impl is None:
-            impl = self._new()
-        impl = impl.replace(microsecond=0)
-        impl = self._lose_timezone(impl)
-        self.impl = impl
+    def __init__(self, dt=None):
+        if dt is None:
+            dt = self._new()
+        dt = dt.replace(microsecond=0)
+        dt = self._lose_timezone(dt)
+        self.dt = dt
 
     @staticmethod
-    def from_string(src):
-        return Timestamp(datetime.strptime(src, '%Y-%m-%dT%H:%M:%SZ'))
+    def from_string(s):
+        return Timestamp(datetime.strptime(s, '%Y-%m-%dT%H:%M:%SZ'))
 
     def __str__(self):
-        return self.impl.isoformat() + 'Z'
+        return self.dt.isoformat() + 'Z'