更改文件后如何读取文件？

Question

不知道watchdog脚本和读文件脚本怎么一起用

import sys 
import time 
import logging from watchdog.observers 
import Observer from watchdog.events 
import LoggingEventHandler

if name == "main": 
    logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(message)s', datefmt='%Y-%m-%d %H:%M:%S')

    path = "C:/watch"

    event_handler = LoggingEventHandler() 
    observer = Observer() 
    observer.schedule(event_handler, path, recursive=True) 
    observer.start() 
    try: 
        while True: 
            time.sleep(1) 
    finally: 
        observer.stop() 
        observer.join()

    file = open('test.txt','r') 
    f = file.readlines()

    newList = [] 
    for line in f: 
        newList.append(line[:-1])

    print(newList)

Answer 1

您的导入不正确（语法错误），if name == "main": 测试也不正确，再看一下 https://pypi.org/project/watchdog/ 中的示例。这是一个补丁版本，加上下面列出的一些更改：

import sys 
import time 
import logging
from watchdog.observers import Observer
from watchdog.events import LoggingEventHandler

def on_modified(event_handler):
    print(f'event_handler.src_path={event_handler.src_path}')

if __name__ == "__main__": 
    logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(message)s',
                        datefmt='%Y-%m-%d %H:%M:%S')

    path = "C:/watch"

    event_handler = LoggingEventHandler() 
    event_handler.on_modified = on_modified
    observer = Observer() 
    observer.schedule(event_handler, path, recursive=True) 
    observer.start() 
    try: 
        while True: 
            time.sleep(1) 
    finally: 
        observer.stop() 
        observer.join()

我添加了一个回调函数 on_modified（目前只做一个打印），将其分配给您的事件处理程序的 on_modified 函数，删除了对“test.txt”文件的编辑结束。您现在应该将其放入回调函数中。

在回调函数中可以看到event_handler.src_path是一个被修改的文件的路径：此时可以放入读取文件的代码

更改文件后如何读取文件？

How to read the file when that file was changed?

python

python-watchdog