subprocess.Popen.stdout - reading stdout in real-time (again)

Question

Again, the same question.
The reason is - I still can\'t make it work after reading the following:

• Real-time intercepting of stdout from another process in

Answer 1

The bufsize=256 argument prevents 12345\n from being sent to the child process in a chunk smaller than 256 bytes, as it will be when omitting bufsize or inserting p.stdin.flush() after p.stdin.write(). Default behaviour is line-buffering.

In either case you should at least see one empty line before blocking as emitted by the first printf(\n...) in your example.