pullQuotesYahooFinance

import os
import requests
from datetime import datetime, date

def generateReqString(stock, startdate, enddate):
    #format of startdate/enddate should be 20140201 for Feb 01, 2014.
    basequery = 'http://ichart.yahoo.com/table.csv?'
    basequery_ending= '&ignore=.csv'
    
    startdate = datetime.strptime(startdate,'%Y%m%d')
    enddate = datetime.strptime(enddate,'%Y%m%d')
    
    sd_year = int(datetime.strftime(startdate, '%Y'))    
    sd_month = int(datetime.strftime(startdate, '%m'))    
    sd_day = int(datetime.strftime(startdate, '%d'))
    
    ed_year = int(datetime.strftime(enddate, '%Y'))
    ed_month = int(datetime.strftime(enddate, '%m'))
    ed_day = int(datetime.strftime(enddate, '%d'))
    
    
    querystring = basequery + 's=' + stock
    
    #encoding start date:
    # a = month-1
    querystring = querystring + '&a=' + str(sd_month - 1)
    # b= day number
    querystring = querystring + '&b=' + str(sd_day)
    # c= year number
    querystring = querystring + '&c=' + str(sd_year)
    
    #encoding end date:
    # d = month-1
    querystring = querystring + '&d=' + str(ed_month - 1)
    # b= day number
    querystring = querystring + '&e=' + str(ed_day)
    # c= year number
    querystring = querystring + '&f=' + str(ed_year)
    
    
    querystring = querystring + basequery_ending
    
    return querystring


def pullSingleStock (stock, startdate, enddate):
    fullreqstring = generateReqString(stock, startdate, enddate)

    r = requests.get(fullreqstring)

    if r.ok:
        #should add check to make sure file doesn't exist also
        f = open(stock+'.csv', 'w')
        f.write(r.text)
        f.close()
    else:
        print 'something terrible happened with %s query' % stock
        print 'status:  '+r.status_code


#set your stocks to query here:
stocks = ['aapl', 'msft', 'ge', 'tsla']

#dates in the format YYYYMMDD
startdate = '20010101'
enddate = '20140601'

for stock in stocks:
	pullSingleStock(stock, startdate, enddate)