Email to Morse Code

import gmail
import time
import RPi.GPIO as GPIO

username = "gmail email name"
password = "password for your account"

g = gmail.login(username,password)

led_pin = 4 #BCM pin 4
GPIO.setmode(GPIO.BCM)
GPIO.setup(led_pin,GPIO.OUT)
GPIO.output(led_pin,GPIO.LOW)

morseAlphabet = {
       "A" : ".-",
        "B" : "-...",
        "C" : "-.-.",
        "D" : "-..",
        "E" : ".",
        "F" : "..-.",
        "G" : "--.",
        "H" : "....",
        "I" : "..",
        "J" : ".---",
        "K" : "-.-",
        "L" : ".-..",
        "M" : "--",
        "N" : "-.",
        "O" : "---",
        "P" : ".--.",
        "Q" : "--.-",
        "R" : ".-.",
        "S" : "...",
        "T" : "-",
        "U" : "..-",
        "V" : "...-",
        "W" : ".--",
        "X" : "-..-",
        "Y" : "-.--",
        "Z" : "--..",
        " " : "/"
}
messages = []
last_message = ""
current_message = ""

def getMessage():
    global messages
    messages = g.inbox().mail(subject="Morse")
    size = len(g.inbox().mail(subject="Morse"))
    message = g.inbox().mail(subject="Morse")[size - 1]
    message.fetch()
    message = message.body
    return message

def encode_morse(text):
        encodedMessage = ""
        for char in text:
            if char.upper() in morseAlphabet:
                encodedMessage += morseAlphabet[char.upper()] + " "             
        return encodedMessage
    
def dot():
    print "dot"
    GPIO.output(led_pin,GPIO.LOW)
    time.sleep(.1)
    GPIO.output(led_pin,GPIO.HIGH)
    time.sleep(.1)
    GPIO.output(led_pin,GPIO.LOW)
def dash():
    print "dash"
    GPIO.output(led_pin,GPIO.LOW)
    time.sleep(.3)
    GPIO.output(led_pin,GPIO.HIGH)
    time.sleep(.3)
    GPIO.output(led_pin,GPIO.LOW)
def check():
    global current_message
    global last_message
    current_message = getMessage()
    if current_message != last_message:
        last_message = current_message
        morse_encoded = encode_morse(current_message)
        print morse_encoded
        for char in morse_encoded:
            if char == '.':
                dot()
            elif char == '-':
                dash()
            elif char == ' ':
                time.sleep(.2)
            elif char == '/':
                time.sleep(.6)
            else:
                print "null"
    else:
        print "done already"
while(1):
    try:
        check()
        g.logout()
        time.sleep(10)
        g = gmail.login(username,password)
    except Exception:   
        g.logout()
        GPIO.cleanup()