python csv

[KINGLEBRON]

I add: errors=replace: (https://docs.python.org/3/library/functions.html#open)

#!/usr/bin/python3
import csv

filename = "IMDB.txt"
with open(filename, 'rt', encoding='utf-8-sig', errors='replace') as imdb_file:
   imdb_reader = csv.DictReader(imdb_file, delimiter = '\t')

   with open('new file.csv', 'w', newline='') as high_rank:
       fieldnames = ['Votes', 'Rank', 'Title', 'Year']
       writer = csv.DictWriter(high_rank, fieldnames=fieldnames)
       writer.writeheader()

       for line_number, current_row in enumerate (imdb_reader):
           if(float(current_row['Rank']) > 9.0):
               writer.writerow(dict(current_row))

i didn't understand what should i do with this error?
thanks for your help!