Library
-------
+ - Issue #21580: Now Tkinter correctly handles bytes arguments passed to Tk.
+ In particular this allows to initialize images from binary data.
+
+- Issue #22003: When initialized from a bytes object, io.BytesIO() now
+ defers making a copy until it is mutated, improving performance and
+ memory use on some use cases. Patch by David Wilson.
+
+- Issue #22018: On Windows, signal.set_wakeup_fd() now also supports sockets.
+ A side effect is that Python depends to the WinSock library.
+
+- Issue #22054: Add os.get_blocking() and os.set_blocking() functions to get
+ and set the blocking mode of a file descriptor (False if the O_NONBLOCK flag
+ is set, True otherwise). These functions are not available on Windows.
+
- Issue #17172: Make turtledemo start as active on OS X even when run with
subprocess. Patch by Lita Cho.