BUG: Used getattr for nano check pandas-dev#47856

Author: KingOfTheShow69

pandas/_libs/tslibs/offsets.pyx

@@ -1157,8 +1157,9 @@ cdef class RelativeDeltaOffset(BaseOffset):
             return dt64other
         elif not self._use_relativedelta and hasattr(self, "_offset"):
             # timedelta
-            if hasattr(self, "nanoseconds"):
-                rem_nano = Timedelta(nanoseconds=self.nanoseconds)
+            num_nano = getattr(self, "nanoseconds", 0)
+            if num_nano != 0:
+                rem_nano = Timedelta(nanoseconds=num_nano)
                 delta = Timedelta((self._offset + rem_nano) * self.n)
             else:
                 delta = Timedelta((self._offset) * self.n)