emmanuel added the comment: Kevin, I now fully agree with you. Regarding points 2 & 3 I dismissed modifying sys.stdin/out in python out of hand because it still would not allow to have a proper behaviour with two concurrent consoles on the same interpreter. Anyway this is not a very meaningful use-case, so modifying sys.stdin/out looks like the best solution. As for point 1, it can be worked around in a twisted and probably non-portable way (setting PyOS_ReadlineFunctionPointer to a custom function that forks a child which runs GNU readline or whatnot on its fds 0,1,2, and which communicates with the parent through pipes) but it's a pity that from PyOS_Readline() on, argument sys_stdin is correctly passed down, and that the chain has only this gap in tok_nextc() which dismisses the caller's argument and uses plain stdin. If the user arguments are not used, why does PyRun_InteractiveLoop() take any arguments at all? It would be nice to know the opinion of the python development team and to work out a complete fix (considering also stdout as you suggest) under their authority.
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