bpo-13601: Mention stderr's line buffering in What's New (GH-20168) · python/cpython@d17f3d8 (original) (raw)

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@@ -542,6 +542,10 @@ most platforms. On Fedora and SuSE, it is equal to ``"lib64"`` on 64-bit
542 542 platforms.
543 543 (Contributed by Jan Matějek, Matěj Cepl, Charalampos Stratakis and Victor Stinner in :issue:`1294959`.)
544 544
545 +Previously, :attr:`sys.stderr` was block-buffered when non-interactive. Now
546 +``stderr`` defaults to always being line-buffered.
547 +(Contributed by Jendrik Seipp in :issue:`13601`.)
548 +
545 549
546 550 typing
547 551 ------