This code help you to find your product in digikala.com which has a specific word in params!

digikala_word_finder.py

# -*- coding: utf-8 -*-

import requests
from bs4 import BeautifulSoup

url = 'https://www.digikala.com/search/category-tablet/?has_selling_stock=1&type[0]=211&attribute[A20378][0]=25460&attribute[A20378][1]=25462&attribute[A20421][0]=25676&attribute[A20421][1]=25677&pageno=1&last_filter=type&last_value=211&sortby=4'
word = 'قلم'

first_char = '?'
if first_char in url:
    first_char = '&'

found_products = []

page = 0
has_page = True
while has_page:
    page += 1
    print 'page', page

    product_list_url = url + first_char + 'pageno=' + str(page)
    products_list = BeautifulSoup(requests.get(product_list_url).content, 'lxml')
    products_list = products_list.select('.c-product-box')
    if len(products_list) < 1:
        has_page = False
        break
    
    products_url = []
    for product_list in products_list:
        for a in product_list.find_all('a'):
            href = a.get('href')
            if href is not None and '/product/dkp-' in href:
                if href not in products_url:
                    products_url.append(href)
    
    for product_url in products_url:
        product_url = 'https://www.digikala.com' + product_url.encode('utf-8')
        print product_url
        product = BeautifulSoup(requests.get(product_url).content, 'lxml')
        if word in product.select('.c-params')[0].text.encode('utf-8'):
            found_products.append(product_url)
            print '========== FOUND! =========='

f = open('products.txt', 'w')
for product in found_products:
    f.write(product + '\n')
f.close()