How to check if a text file is open in gedit

Question

So this is a basic client server socket program.The client sends the file to the server and the server opens it using gedit.

p = subprocess.Popen("gedit file", shell=True, stdout=subprocess.PIPE,stderr=subprocess.STDOUT)

I want the code to work like

while file_open in gedit:
            wait()
after file_closed and saved
            send to client

Answer 1

while p.is_alive():
    ...

I guess... but that will really just keep going as long as the process (gedit) is open ... they may have closed that specific file ...