I’m trying to find some passwords using the Rainbow method. I have a CSV file containing people’s names and their hashed passwords using SHA-256. I have to retrieve the original passwords which are four-digit numbers [1000-9999].
The CSV file:
iliya,cfa8624c2d1e3c8c89316808b45ce942770e5ef9cd845dfd74baf4a616aa6d3a arshia,03ac674216f3e15c761ee1a5e255f067953623c8b388b4459e13f978d7c846f4
my code:

import hashlib
import csv
    
def hash_password_hack(passwords, new_passwords):
    with open (r'password.csv','r', encoding='utf-8') as f:
        reader=csv.reader(f)
        dict1={}
        for row in reader:
            dict1[row[1]]=row[0]
        dict2={}
        for i in range (1000,10000):
            hashed_password=hashlib.sha256(str(i).encode('utf-8')).hexdigest()
            dict2[hashed_password]=i
        for key in dict1:
            with open (r'new_passwords.csv', 'w', newline='') as f1:
                writer=csv.writer(f1)
                password=dict2[key]
                name=dict1[key]
                writer.writerow([name,password])