如何从文件中每天选择一行？

import datetime

def select_line_from_file(file_path):
    # 获取当前日期
    today = datetime.date.today()
    # 计算行数
    line_number = today.day % count_lines_in_file(file_path)
    # 读取文件并选择对应行
    with open(file_path, 'r') as file:
        lines = file.readlines()
        selected_line = lines[line_number]
    return selected_line

def count_lines_in_file(file_path):
    with open(file_path, 'r') as file:
        lines = file.readlines()
        line_count = len(lines)
    return line_count

# 示例用法
file_path = 'example.txt'
selected_line = select_line_from_file(file_path)
print(selected_line)