def _current_frame():
if not is_active():
raise RevisionManagementError("There is no active revision for this thread")
return _local.stack[-1]
def _assert_active(self):
"""Checks for an active revision, throwning an exception if none."""
if not self.is_active(): # pragma: no cover
raise RevisionManagementError(
"There is no active revision for this thread")