[issue24829] Use interactive input even if stdout is redirected

[Adam Bartoš]

Adam Bartoš added the comment:

Behavior of which readline? GNU readline? Note that it is only one particular implmentation on one particular platform while Python should be as multiplatform as possible / viable.

And what behavior it is? More precisely, what incorrect behavior in Linux would it bring if the condition in 

    if (!isatty (fileno (sys_stdin)) || !isatty (fileno (sys_stdout)))
        rv = PyOS_StdioReadline (sys_stdin, sys_stdout, prompt);
    else
        rv = (*PyOS_ReadlineFunctionPointer)(sys_stdin, sys_stdout, prompt);

was replaced by `!isatty (fileno (sys_stdin))`?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue24829>
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