How can i make this code to run faster

[stullis]

Like nilamo said, multithreading is the best bet for a major performance boost. For something more marginal, I made a few edits to remove superfluous lines and use some more performant functions/methods.

from bs4 import BeautifulSoup
import requests
import csv
import urllib.request
import os
 
def get(url, values):
    res = requests.get(url, data=values)
    d = res.status_code
    if d!=200:
        print("Invalid Link")
    else:
        print("Valid link")
    data = res.text
    return data
 
def readfile():
    final_data = []
    with open("./plans.csv", "r") as csvfile:
        reader = csv.reader(csvfile)
        next(reader)
        for row in reader:
            lists = row[0]
            ind = row[1]+".jpg"
            d = requests.get(lists)
            sublist = []
            sublist.append(os.path.abspath(ind)) # Eliminate mj variable
            try:
                d = urllib.request.urlretrieve(lists, ind)
                sublist.append(lists)
            except Exception as e:
                sublist.append(e)
            final_data.append(sublist)

    return final_data
 
def writefiles(alldata, filename):
    with open ("./"+ filename, "a+") as file:
        csvfile = csv.writer(file, delimiter=",")
        csvfile.writerow("")
        csvfile.writerows(alldata) # csvwriter.writerows() instead of loop
 
def main():
    writefiles(readfile(), "downloads.csv")

main()