import csv import pandas as pd def grab_vals(): file = "/Users/normrasmussen/Downloads/antho_domains.csv" final_array = [] with open(file, 'r') as file: reader = csv.reader(file) for row in reader: for item in row: if item != '': final_array.append(item) print(len(final_array)) final_list = list(set(final_array)) print(len(final_list)) final = ["@"+domain for domain in final_list] # print(final) filecsv = pd.DataFrame(final) filecsv.to_csv("/Users/normrasmussen/Downloads/final_domains.csv") if __name__ == "__main__": grab_vals()