how do I download data from bank using python

#!/usr/bin/python2
import requests
from datetime import datetime
import urlparse
import urllib
import dropbox
import csv
from bs4 import BeautifulSoup

USERNAME = ""
PASSWORD = ""
pin = [1,2,3,4]
FILENAME="bank.csv"
start_date = urllib.quote_plus(datetime(2017, 05, 15).strftime("%d/%m/%Y"))
end_date = urllib.quote_plus(datetime.today().strftime("%d/%m/%Y"))

ROOT_URL = "https://www.open24.ie/online"
LOGIN_URL = "https://www.open24.ie/online/Login/"
FORM_ENDPOINT_URL = "https://www.open24.ie/online/"
FORM2_ENDPOINT_URL = "https://www.open24.ie/online/Login/Step2"
TX_ENDPOINT = "https://www.open24.ie/online/Accounts/Details/RecentTransactions"

def get_data(session, url):
    result = session.get(url)
    return BeautifulSoup(result.content,"html.parser")

def post_data(session, url, data):
    result = session.post(url, data=data, headers=dict(referer = LOGIN_URL))
    return BeautifulSoup(result.content,"html.parser")

"""
 Finds out which digits are requested from PIN
"""
def get_pin_digits(soup):
    t1 = int(soup.find("label", {'for': 'login-digit-1'}).string.replace("Digit ",""))-1
    t2 = int(soup.find("label", {'for': 'login-digit-2'}).string.replace("Digit ",""))-1
    t3 = int(soup.find("label", {'for': 'login-digit-3'}).string.replace("Digit ",""))-1
    return t1, t2, t3

"""
 Gets the Verification token used to submit forms
"""
def get_verif_token(soup):
    return soup.find("input", {'name': '__RequestVerificationToken'}).get('value')

"""
 Gets the account UUID generated on login
"""
def get_acct_id(soup):
    acct_id_url = soup.find("h2", {'class': 'heading-general'}).contents[0]['href']
    url_data = urlparse.urlparse(acct_id_url)
    query = urlparse.parse_qs(url_data.query)
    acct_id = query["accountId"][0]
    return acct_id

def main():
    session_requests = requests.session()

    # Get login csrf token
    soup = get_data(session_requests, LOGIN_URL)
    authenticity_token = get_verif_token(soup)
    
    # Create payload
    payload = {
        "__RequestVerificationToken": authenticity_token,
        "section": "",
        "login-number": USERNAME, 
        "login-password": PASSWORD,   
    }

    # Perform initial login
    soup = post_data(session_requests, LOGIN_URL, payload)
    authenticity_token = get_verif_token(soup)
    t1, t2, t3 = get_pin_digits(soup)
    
    # Create payload
    payload = {
        "__RequestVerificationToken": authenticity_token,
        "login-digit-1": pin[t1],
        "login-digit-2": pin[t2], 
        "login-digit-3": pin[t3]  
    }

    # Perform 2nd login
    soup = post_data(session_requests, FORM2_ENDPOINT_URL, payload)

    avail_funds = soup.find("span", {'class': 'fund-1'}).string.encode('ascii', 'ignore')
    cur_bal = soup.find("span", {'class': 'fund-2'}).string.encode('ascii', 'ignore')

    acct_id = get_acct_id(soup)
    print("Available Funds: ", avail_funds)
    print("Current Balance: ", cur_bal)
    print("Account ID: ", acct_id)

    url = 'https://www.open24.ie/online/Accounts/Details/RecentTransactions?accountId='+acct_id+'&from-date='+start_date+'&to-date='+end_date
    soup = get_data(session_requests, url)
    valid_trs = [item for item in soup.find_all('tr') if "data-uid" in item.attrs]

    outputFile = open(FILENAME, 'w')
    outputWriter = csv.writer(outputFile, lineterminator = '\n')
    outputWriter.writerow(['Date','Desc','In','Out','Total'])
    
    for tr in valid_trs:
        date = datetime.strptime(tr.find("td", {'class': 'date'}).string, '%d %b %y').strftime('%d-%b-%y')
        desc = tr.find("td", {'class': 'desc'}).string
        if desc is None:
            desc = tr.find("td", {'class': 'desc'}).find('a', {'class':'underline'}).string
        desc = str(desc).strip()
        tds = tr.findAll("td", {'class': 'currency'})
        monin = tds[0].string
        monout = tds[1].string
        total = tds[2].string
        outputWriter.writerow([date, desc, monin, monout, total])
    outputFile.close()

if __name__ == '__main__':
    main()