Note versionadded.

Doc/library/queue.rst

@@ -36,6 +36,8 @@ The :mod:`Queue` module defines the following classes and exceptions:
    block once this size has been reached, until queue items are consumed.  If
    *maxsize* is less than or equal to zero, the queue size is infinite.
 
+   .. versionadded:: 2.6
+
 .. class:: PriorityQueue(maxsize)
 
    Constructor for a priority queue.  *maxsize* is an integer that sets the upperbound
@@ -47,6 +49,8 @@ The :mod:`Queue` module defines the following classes and exceptions:
    one returned by ``sorted(list(entries))[0]``).  A typical pattern for entries
    is a tuple in the form: ``(priority_number, data)``.
 
+   .. versionadded:: 2.6
+
 .. exception:: Empty
 
    Exception raised when non-blocking :meth:`get` (or :meth:`get_nowait`) is called