Python PySerial.How to know if a port is already open?

Question

I\'m trying to write an App that uses serial ports in a Linux PC, using python and PySerial. But in this PC there are other Apps using serial ports. How can I know if a port is

Answer 1

Seems to be badly documented on the PySerial website, this works for me:

ser = serial.Serial(DEVICE,BAUD,timeout=1)
if(ser.isOpen() == False):
    ser.open()

A bit of a contrived example, but you get the idea. I know this question was asked a long time ago, but I had the same question today and felt anyone else finding this page would appreciate finding an answer.