Thanks for answering, No, the data was writing into the file when the subprocess was runing.
For example, every second it will write something into the file. I tried to run another python program aside and it sucessfully read the file when the subprocess was runing. JD On Aug 2, 11:00 am, Adrian Petrescu <[EMAIL PROTECTED]> wrote: > On Aug 2, 12:41 pm, JD <[EMAIL PROTECTED]> wrote: > > > > > Hi, > > > What I am trying to do is to run a subprocess on another machine using > > subprocess.Popen, this subprocess contuinue writing something into a > > file when it is runing. > > > After submit this subprocess, I tried to open the file and readlines() > > in the loop (with a delay) in the loop) when the subprocess was > > runing. > > > The problem is I could not get anything untill the subprocess > > finished. > > > I also tried to run another python programm when the subprocess is > > runing, I could get what I want. > > > Does anyone know why? Thanks! > > > JD > > Could the problem be that the subprocess only flushes the output > buffer when it terminates, and so until the subprocess "finishes", as > you say, the file is empty because the data is still in the buffer? > Trying throwing some flushes into the code and see if it helps. > > Or am I misunderstanding your question? -- http://mail.python.org/mailman/listinfo/python-list
