这是一段每分钟将文件夹中的所有.csv文件转换为.xls的代码。但我寻求一些帮助来避免重复

import os
import pandas as pd
from datetime import datetime, timedelta
import time

def convert_csv_to_xls(folder_path):
    while True:
        current_time = datetime.now().strftime("%H:%M")
        if current_time == "00:00":
            files = os.listdir(folder_path)
            csv_files = [file for file in files if file.endswith(".csv")]
            for csv_file in csv_files:
                csv_path = os.path.join(folder_path, csv_file)
                df = pd.read_csv(csv_path)
                xls_file = csv_file.replace(".csv", ".xls")
                xls_path = os.path.join(folder_path, xls_file)
                df.to_excel(xls_path, index=False)
            print("转换完成！")
        time.sleep(60)

folder_path = "文件夹路径"
convert_csv_to_xls(folder_path)