Cat Feeder

#!/usr/bin/pi python
# coding: utf8
from imapclient import IMAPClient, SEEN

SEEN_FLAG = 'SEEN'
UNSEEN_FLAG = 'UNSEEN'

class GmailWrapper:
    def __init__(self, host, userName, password):
        #   force the user to pass along username and password to log in as
        self.host = host
        self.userName = userName
        self.password = password
        self.login()

    def login(self):
        print('Logging in as ' + self.userName)
        server = IMAPClient(self.host, use_uid=True, ssl=True)
        server.login(self.userName, self.password)
        self.server = server

    #   The IMAPClient search returns a list of Id's that match the given criteria.
    #   An Id in this case identifies a specific email
    def getIdsBySubject(self, subject, unreadOnly=True, folder='INBOX'):
        #   search within the specified folder, e.g. Inbox
        self.setFolder(folder)

        #   build the search criteria (e.g. unread emails with the given subject)
        self.searchCriteria = [UNSEEN_FLAG, 'SUBJECT', subject]

        if(unreadOnly == False):
            #   force the search to include "read" emails too
            self.searchCriteria.append(SEEN_FLAG)

        #   conduct the search and return the resulting Ids
        return self.server.search(self.searchCriteria)

    def markAsRead(self, mailIds, folder='INBOX'):
        self.setFolder(folder)
        self.server.set_flags(mailIds, [SEEN])

    def setFolder(self, folder):
        self.server.select_folder(folder)

HOSTNAME = 'imap.gmail.com'
USERNAME = 'user@gmail.com'
PASSWORD = 'password'

def feedByGmail():
    gmailWrapper = GmailWrapper(HOSTNAME, USERNAME, PASSWORD)
    ids = gmailWrapper.getIdsBySubject('feed cats')
    if(len(ids) > 0):
        try:
            feed()
            gmailWrapper.markAsRead(ids)
        except:
            print("Failed to feed cats, they're starvingggg")

import RPi.GPIO as GPIO
import time
def feed():
    # let the library know where we've connected our servo to the Pi
    GPIO.setmode(GPIO.BCM)
    GPIO.setup(18, GPIO.OUT)

    try:
        servo = GPIO.PWM(18, 50)
        servo.start(12.5)

        # spin left, right, then left again rather than in a continuous circle
        # to prevent the food from jamming the servo
        for index in range(0, 3):
            dutyCycle = 2.5 if (index % 2 == 0) else 12.5
            servo.ChangeDutyCycle(dutyCycle)
            time.sleep(0.8)
    finally:
        # always cleanup after ourselves
        servo.stop()
        GPIO.cleanup()

if __name__ == '__main__':
    # kick off the feeding process (move the servo)
    # we now use our new feedByGmail method to handle the feeding
    feedByGmail()