[issue41449] An article on Python 3 stdout and stderr output buffering

[Guido van Rossum]

Guido van Rossum <guido at python.org> added the comment:

If you don't even know whether it's Python, Docker or Kubernetes you really need to ask somewhere else.  Plenty of user groups around.

Python detects tty using the standard UNIX isatty() function.

To a tty we always get line buffering.

To a file we use a larger buffer.

For more details see the source at
https://github.com/python/cpython/blob/4660597b51b3d14ce6269d0ed865ab7e22c6ae1f/Python/pylifecycle.c#L1942

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