Random832 <random...@fastmail.com> wrote:
>The opposite of line buffering is not no buffering, but full
>(i.e. block) buffering, that doesn't get flushed until it runs
>out of space. TextIOWrapper has its own internal buffer, and its
>design apparently doesn't contemplate the possibility of using
>it with a raw FileIO object (which may mean that the posted code
>isn't guaranteed to work) or disabling buffering.
Hmmm. That even seems to cause trouble for sys.stderr.write
(in Python3 with a non-tty e.g. a piped output):
$ python2 -c 'import sys;sys.stderr.write("1\n");print("2")' 2>&1 | tee
1
2
$ python3 -c 'import sys;sys.stderr.write("1\n");print("2")' 2>&1 | tee
2
1
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