Python将重复项计数为csv文件中的唯一项

import csv
from collections import Counter

def count_duplicates(file_path):
    with open(file_path, 'r') as file:
        reader = csv.reader(file)
        data = [row[0] for row in reader]  # 假设csv文件只有一列数据
        counter = Counter(data)
        duplicates = [item for item, count in counter.items() if count > 1]
        return duplicates

def count_duplicates_to_csv(file_path, output_file_path):
    duplicates = count_duplicates(file_path)
    with open(file_path, 'r') as file:
        reader = csv.reader(file)
        with open(output_file_path, 'w', newline='') as output_file:
            writer = csv.writer(output_file)
            for row in reader:
                if row[0] in duplicates:
                    writer.writerow([row[0], duplicates.count(row[0])])
                else:
                    writer.writerow(row)