What does this error mean in python please? How can I resolve it as well? :(

import os import csv dir_path = os.getcwd() \# Set the directory path where the emails are located email_data = [] \# Create an empty list to store the email data with open("labels", "r") as f: \# Read in the spam filter file for line in f: \# Split the line into the classification and the file path classification, file_path = line.strip().split() file_path = file_path[3:] \# Use the os module to join the directory path and the file path full_path = os.path.join(dir_path, file_path) \# Open the email file and read its contents into a string with open(full_path, "r") as email_file: email_body= email_file.read() \# Append the classification and the email body to the email data list email_data.append([classification, email_body]) \# Write the email data to a csv file with open("email_data.csv", "w") as csv_file: writer = csv.writer(csv_file) for row in email_data: writer.writerow(row) UnicodeDecodeError: 'utf-8' codec can't decode byte 097 in position 837: invalid start byte