通过pip安装依赖

pip install watchdog

监控代码

import os
import time
import datetime
from watchdog.observers import Observer
from watchdog.events import FileSystemEventHandler

class MyHandler(FileSystemEventHandler):
    def __init__(self):
        super().__init__()
        self.last_position = 0
    def on_modified(self, event):
        if not event.is_directory and event.src_path.endswith("log.log"):
            with open(event.src_path, "r", encoding='UTF-8') as f:
                f.seek(0, 2) # 将指针移动到文件末尾
                if self.last_position == 0 or self.last_position > f.tell():
                    self.last_position = f.tell()   # 如果是第一次打开文件则将读取记录移动到文件尾
                f.seek(self.last_position, os.SEEK_SET) # 将指针移动到上次读取位置
                try:
                    for line in f.readlines():
                        # 逐行打印文件变化内容
                        now = datetime.datetime.now()  # 获取当前时间
                        print("[{}] {}".format(now.strftime("%Y-%m-%d %H:%M:%S"), line))
                except UnicodeDecodeError as e:
                    print(e)
                    f.seek(0, 2) # 将指针移动到文件末尾    
                self.last_position = f.tell() #记录当前读取位置

if __name__ == "__main__":
    event_handler = MyHandler()
    observer = Observer()
    observer.schedule(event_handler, "D:\Logs", recursive=False)
    observer.start()

    try:
        while True:
            time.sleep(1)
    except KeyboardInterrupt:
        observer.stop()
    observer.join()