gcode sender

import Tkinter, tkFileDialog, tkSimpleDialog, time, serial
from ScrolledText import ScrolledText
from tkFileDialog import askopenfilename
from tkSimpleDialog import*
from Tkinter import*

root = Tk()
myFrame = Frame(root) #Frame(root, width = 800, height = 500)
myFrame.master.title("G-code sender")
myFrame.pack()
def openfile():
    root.update()
    try :
# untuk mengetahui port yang digunakna arduino. ketik "dmesg" di terminal linux
        ser = serial.Serial('/dev/ttyACM0',9600)
        print "open port succes"
    except:
        ask = askstring("Port", "Set port", initialvalue="/dev/ttyACM0")
        print ask
        ser = serial.Serial('ask',9600)
    finally:
        print "jika port tidak diatur, maka koneksi tidak dapat dilanjutkan"
    filename = askopenfilename(filetypes=[("all files", "*")])
    myFile = open(filename)
    teks=ScrolledText(root)
    Filereadlines = myFile.readlines()
    turtle.title("Visual G-code Viewer")
    for x in range(0,len(Filereadlines)):
        data = Filereadlines[x]
        ser.write(Filereadlines[x])
        print Filereadlines[x]
        splitspc = data.split(' ')
        time.sleep(0.4) #untuk mengatur delay
    myFile.close()
Button(root, text="Quit", command=root.destroy).pack(side = BOTTOM, expand = YES, fill = X)
Button(root, text='Browse file', command=openfile).pack(side = BOTTOM, expand = YES, fill = X)
root.mainloop()