Python - problema con un script: skipped 'NoneType' object is not suscriptable

import re

from requests_html import HTMLSession

def start(url): #Takes info of a product, including url of product page and scrapes Price,rating and others

    timeout = 1

    session = HTMLSession()

    header = {'User-agent': 'Mozilla/5.0', 'aep_usuc_f':'site=glo&province=919986676578000000&city=919986676578011000&c_tp=EUR&region=ES&b_locale=en_US'}

    cookies = {'aep_usuc_f':'site=glo&province=919986676578000000&city=919986676578011000&c_tp=EUR&region=ES&b_locale=en_US'}

    r = session.get(url, headers=header, cookies=cookies) #Open URL of the product

    price = getprice(r)                 #Gets the price of the product

    while price is None and timeout < 5: #Retries 5 times in case the proxy isn't working

        r = session.get(url, headers=header)

        print(r.status_code)

        price = getprice(r)

        timeout += 1

    price.replace(',','')   #Remove commas

    discountlist = getdiscount(r)   #Get if there is a discount

    discount = discountlist[0]

    oldprice = discountlist[1]

    oldprice = oldprice.replace(',','')

    oldprice =re.sub(r'[^-^\d^\.]+', '', oldprice)

    rating = getrating(r)

    title = gettitle(r).replace(',',' ')  #

    photo = r.html.search('<img alt={} src="{}" data-role="thumb" style="max-width: 500px; max-height: 500px;"')[1]

    return {            #Return the info of the product to be stored/displayed

        'price':price,

        'discount':discount,

        'oldprice':float(oldprice),

        'title':title,

        'rating':rating,

        "photo":photo

    }

def getprice(r):    #Get the price of the product from its url

    price = r.html.search('<span itemprop="lowPrice">{}</span> - <span itemprop="highPrice">{}</span>')

    if price is not None:

        price = price[0]+"€" # + "-€"+ price[1]

        return price

    else:

        price = r.html.search('"actSkuMultiCurrencyCalPrice":"{}","')

        price = price[0] + "€"

        return price

def getdiscount(r): #Get the discount of the product from its url, and the old price if there is a discount

    oldprice = r.html.search('<span class="a-text-strike"> {}</span>')

    if oldprice is not None:

        return [True, oldprice[0]]

    else:

        return [False, '-1']

def getrating(r):

    rating = r.html.search('<span class="percent-num">{}<')

    no = r.html.search('<span class="rantings-num">({} votes')

    if rating is not None:

        rat = rating[0]

        if (".0" in rat):

            rat = rat.strip(".0")

        return (rat + " / 5 (" + no[0] +" opiniones)")

def gettitle(r):    #Get the title of the product from its url

    title = r.html.search('<title>{}</title>')

    if (title is not None):

        print(title[0].strip().strip("Aliexpress.com : "))

        return (title[0].strip().strip("Aliexpress.com : ").strip('" />'))

    else:

        title = r.html.search('<meta property="og:title" content="{}|{}" />')

        return (title[1].strip().strip("Aliexpress.com : ").strip('" />'))

photo = r.html.search('<img alt={} src="{}" data-role="thumb" style="max-width: 500px; max-height: 500px;"')[1]

photo = r.html.search('<img alt={} src="{}" data-role="thumb" style="max-width: 500px; max-height: 500px;"')