This Python script checks stock prices in Google Finance pages and send notifications (email and instant) if predetermined conditions in a csv file (passed as argument) are met. More info: http://www.movingelectrons.net/blog/2014/01/12/how-to-get-alerts-on-stock-price-changes-using-python.html

StockPriceCheck.py

#!/usr/local/bin/python2.7

import string, re, os, time, smtplib, sys
from urllib import urlopen
import httplib, urllib #used in the Pushover code


def quote_grab(symbol):
   
    baseurl = 'http://google.com/finance?q='
    urlData = urlopen(baseurl + symbol)
   
    print 'Opening Google Finance URL...'

    # Another option: namestr = re.compile('.*name:\"' + symbol + '\",cp:(.*),p:(.*?),cid(.*)}.*')
    namestr = re.compile('.*name:\"' + symbol + '\",cp:(.*),p:(.*?),cid(.*)') # "?" used as there is a second string "cid" in the page and the Match was being done up to that one. The "?" keeps it to the 1st occurrence.
   
    print 'Checking quotes for ' + symbol
   
    for line in urlData:
       
        m = re.match(namestr, line)
       
        if m:
            #Since the method m.group(2) returns a string in the form "xxxx", it cannot be converted to float,
            #therefore I strip the "" from that string and pass it to the float function.
            priceStr = m.group(2).strip('"')
            price = float(priceStr)
           
       
    urlData.close()
    return price #returns price as a float

def pushover(msg):

    conn = httplib.HTTPSConnection("api.pushover.net:443")
    conn.request("POST", "/1/messages.json",
        urllib.urlencode({
            "token": "INSERT YOUR TOKEN HERE",
            "user": "INSERT YOUR API USER KEY HERE",
            "message": msg,
    }), { "Content-type": "application/x-www-form-urlencoded" })
    conn.getresponse()


def send_email(sbjt, msg):
    fromaddr = 'INSERT HERE THE FROM EMAIL ADDRESS'
    toaddrs = 'INSERT THE EMAIL ADDRESS THE NOTIFICATION WILL BE SENT TO'
    bodytext = 'From: %s\nTo: %s\nSubject: %s\n\n%s' %(fromaddr, toaddrs, sbjt, msg)
   
    # Credentials (if needed)
    username = '[email protected]'
    password = 'INSERT HERE YOUR PASSWORD' 
  
    # The actual mail sent
    server = smtplib.SMTP('smtp.gmail.com:587')
    server.starttls()
    server.login(username,password)
    server.sendmail(fromaddr, toaddrs, bodytext)
    server.quit()

#------------------------
# Constants
file = sys.argv[1]

#------------------------

# Opens .cvs file, gets string at last line, converts it to list so that the comparison in the
# IF statement below can be done
csvFile = open(file, 'r')
body = 'Changes:\n'
chg = False

for line in csvFile:
    linelst = line.split(',')
    quote = quote_grab(linelst[0])
   
    if quote>float(linelst[1]) and linelst[2]==('a\n' or 'a'):
        body = body + 'Price for %s went up to %s (threshold = %s)\n' % (linelst[0], quote, linelst[1])
        chg = True
    if quote<float(linelst[1]) and linelst[2]==('b\n' or 'b'):
        body = body + 'Price for %s went down to %s (threshold = %s)\n' % (linelst[0], quote, linelst[1])
        chg = True
   
if chg:
    print 'sending email...'
    send_email('Stock Price Changes',body)
    print 'sending message to pushover...'
    pushover(body)
   
csvFile.close()