STINNER Victor <victor.stin...@gmail.com> added the comment:
I created this issue because of this comment in create_stdio() of
Python/pylifecycle.c:
---
/* stdin is always opened in buffered mode, first because it shouldn't
make a difference in common use cases, second because TextIOWrapper
depends on the presence of a read1() method which only exists on
buffered streams.
*/
if (Py_UnbufferedStdioFlag && write_mode)
buffering = 0;
else
buffering = -1;
---
----------
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue31775>
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