Populate Option Menu from a variable

Question

The following is a part of my code. I have a function that scans the com ports and pulls the available com ports that are connected. I want to list these com ports as different selections in an Option Menu. When I run this code, the only option available is COM2 COM4, is there a simple way to separate these into two different options? I am not looking only for how to populate the option menu with a list, but how to convert the data I have to a list. Thanks.

    global model
    model = StringVar(master)
    self.option = StringVar()
    w = OptionMenu(master, self.option, ())

From the scan of com ports, the print statement returns ['COM2', 'COM4'].

    print(serial_ports())
    global com
    com = list(serial_ports())
    self.option.set(com)

Below is the full code for scanning the com port.

    def serial_ports():
        """ Lists serial port names

            :raises EnvironmentError:
                On unsupported or unknown platforms
            :returns:
                A list of the serial ports available on the system
        """
        if sys.platform.startswith('win'):
            ports = ['COM%s' % (i + 1) for i in range(256)]
        elif sys.platform.startswith('linux') or sys.platform.startswith('cygwin'):
            # this excludes your current terminal "/dev/tty"
            ports = glob.glob('/dev/tty[A-Za-z]*')
        elif sys.platform.startswith('darwin'):
            ports = glob.glob('/dev/tty.*')
        else:
            raise EnvironmentError('Unsupported platform')

        result = []
        for port in ports:
            try:
                s = serial.Serial(port)
                s.close()
                result.append(port)
            except (OSError, serial.SerialException):
                pass
        return result

    if __name__ == '__main__':
        print(serial_ports())
        global com
        com = serial_ports()

        self.option.set(com)

Answer 1

This proves that what I have said works:

from tkinter import *

root = Tk()

var = StringVar()
array = ["COM2", "COM4"]
var.set(array[0])

OptionMenu(root, var, *array).pack()

root.mainloop()

Please read this:

https://stackoverflow.com/a/18213202/4528269