Saving stdout from subprocess.Popen to file line by line

Question

My python script uses subprocess to call an another script, which produces output very slow(line-by-line basis). I would like to write the output line by line to file not when t

Answer 1

I had the same problem for a programming language I'm working on, and ended up doing this: https://github.com/perimosocordiae/plumbum/blob/master/lib/stdlib.py#L21

Unfortunately, it involves reading from the output stream a character at a time, accumulating the line until a newline is found. It works, though, and I don't know of any other way to get the same behavior.