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Howdy,

I have a good example to share for anyone interested in trying out a simple Arduino Python Twitter app.
Good Luck!

Instructable: http://www.instructables.com/id/simpleTweet01python/

Arduino Code

Code:

// **************************************************************************************************
// for use with simpleTweet_01_python.py

const int magReed_pin = 10; // pin number
int magReed_val = 0;
int currentDoorState = 1; // begin w/ circuit open
int previousDoorState = 1;

void setup(){
  Serial.begin(9600);
  pinMode(magReed_pin, INPUT);
}

void loop(){
  watchTheDoor();
}

void watchTheDoor(){
magReed_val = digitalRead(magReed_pin);
if (magReed_val == LOW){ // open
currentDoorState = 1;
if (previousDoorState != currentDoorState){
if (Serial.available()<=0) Serial.println("Opened door");
}
}
if (magReed_val == HIGH){ // closed
currentDoorState = 2;
if (previousDoorState != currentDoorState){
if (Serial.available()<=0) Serial.println("Closed door");
}
}
previousDoorState = currentDoorState;
delay(300);
}
// **************************************************************************************************

Python Code

Code:

#######################################################################################
# simpleTweet_01_python.py
# visit my instructables for more information
# http://www.instructables.com/member/pdxnat/

print 'running... simpleTweet_01_python'

# import libraries
import twitter
import serial
import time

# connect to arduino via serial port
arduino = serial.Serial('COM4', 9600, timeout=1)

# establish OAuth id with twitter
api = twitter.Api(consumer_key='YOUR_CONSUMER_KEY',
                  consumer_secret='YOUR_CONSUMER_SECRET',
                  access_token_key='YOUR_ACCESS_TOKEN_KEY',
                  access_token_secret='YOUR_ACCESS_TOKEN_SECRET')

# listen to arduino
def listenToArduino():
    msg=arduino.readline()
    if msg > '':
        print 'arduino msg: '+msg.strip()
        compareMsg(msg.strip())

# avoid duplicate posts
def compareMsg(newMsg):
    # compare the first word from new and old
    status = api.GetUserTimeline('yourUsername')
    prevMsg = [s.text for s in status]
    pM = ""+prevMsg[0]+""
    pM = pM.split()
    nM = newMsg.split()
    print "prevMsg: "+pM[0]
    print "newMsg: "+nM[0]
    if pM[0] != nM[0]:
        print "bam"
        postMsg(newMsg)

# post new message to twitter
def postMsg(newMsg):
    localtime = time.asctime(time.localtime(time.time()))
    tweet = api.PostUpdate(newMsg+", "+localtime)
    print "tweeted: "+tweet.text

while 1:
    listenToArduino()

#####################################################################################