comparador.py

import bs4
from urllib.request import urlopen as uReq
from bs4 import BeautifulSoup as soup
import csv

myurl = "https://www.lider.cl/supermercado/category/Despensa/Pastas/Fideos-Largos/_/N-673e4a"
uClient = uReq(myurl)
page_html = uClient.read()
nombres = []
marcas = []
gramaje = []
precios = []

page_soup = soup(page_html,"html.parser")

container = page_soup.find_all("a",{"data-level":"3"})

links = []
link = "https://www.lider.cl"
for cont in container:
    
    for i in cont:
        
        links.append(link+cont["href"])
        


for link1 in links:
    my_url = link1 + "?N=&No=0&Nrpp=120&isNavRequest=Yes"
    print("Conectando a: "+my_url)
    try:    
        uClient = uReq(my_url)
    except:
        print("Error Continuando...")
        pass
    page_html = uClient.read()
    uClient.close()
    page_soup = soup(page_html,"html.parser")
    container = page_soup.find_all("div",{'class':'box-product'})
    for containers in container:
    
        raw_marca = containers.find_all("span",{"class":'product-name'})
        raw_nombre = containers.find_all("span",{'class':'product-description'})
        raw_gramos = containers.find_all("span",{'class':'product-attribute'})
        raw_precio = containers.find_all("span",{'class':'price-sell'})
        marca = raw_marca[0].text
        nombre = raw_nombre[0].text
        gramos = raw_gramos[0].text
        precioes = raw_precio[0].text
        precio = " ".join(precioes.split())
        nombres.append(nombre)
        precios.append(precio)
        gramaje.append(gramos)
        marcas.append(marca)
       
f = open("Lider dia 001.csv","w", encoding="utf-8")
f.write("Producto,Precio"+"\n")
for i in range(len(precios)):
    f.write((nombres[i].replace(",","|")+" "+marcas[i].replace(",","|")+" "+gramaje[i].replace(",","|")+","+precios[i].replace(",","|")+"\n"))
f.close()

nombre = []
precio = []
file = input("Escriba el nombre del archivo (Sin Extension):  ")
filef = file + ".csv"
with open(filef, encoding="utf8") as f:
    y = csv.reader(f,delimiter =",")
    for i in y:
        nombre.append(i[0])
        precio.append(i[1])
        
nombre2 = []
precio2 = []
file = input("Escriba el nombre del archivo a comparar (Sin Extension):  ")
filef = file + ".csv"
with open(filef, encoding="utf8") as f:
    y = csv.reader(f,delimiter =",")
    for i in y:
        nombre2.append(i[0])
        precio2.append(i[1])
        
for j in range(len(precio2)):
    if not (precio[j] == precio2[j]):
        print("Nombre: " + nombre2[j] + "\n" + "Precio antiguo: " + precio[j] + "\n Precio Nuevo: " + precio2[j] )