Example Python script that pings a website and sends email alert in case it's unreachable

website-monitor-example.py

from urllib2 import urlopen


def send_alert():
    from smtplib import SMTP
    from email.mime.text import MIMEText

    msg = MIMEText('nuf said')
    msg['Subject'] = 'inventi.lt is unreachable'
    msg['From'] = 'osvaldas@inventi.lt'
    msg['To'] = 'osvaldas@inventi.lt'

    server = SMTP('smtp.gmail.com:587')
    server.ehlo()
    server.starttls()
    server.login('username', 'password')
    server.sendmail('osvaldas@inventi.lt', ['osvaldas@inventi.lt'], msg.as_string())
    server.quit()


try:
    urlopen('http://inventi.lt/xxx')
    print 'OK'
except:
    send_alert()