如何正确运行看门狗的RegexMatchingEventHandler? [英] How to run the RegexMatchingEventHandler of Watchdog correctly?

问题描述

我正在为GameApi开发一个小型工具.该Api可与.log文件一起使用.它们在特定位置提供.如果要使用PatternMatchingEventHandler，我想与看门狗一起观察此位置，并且工作正常.但是，如果我使用RegexMatchingEventHandler，它将失败.我想使用Regex，因为那里有很多.log文件，我只想从今天开始检查文件.

I'm working on a small tool for a GameApi. This Api works with .log-files. They are provided in a specific location. I want to observe this location with with watchdog and it is working fine, if I use the PatternMatchingEventHandler. But if I use the RegexMatchingEventHandler it fails. I want to use Regex because there a many .log-files and I only want to check the files from today.

扩展:我将Watchdog与以下功能配合使用:

Extension: I use Watchdog with the functions:

on_created
on_deleted
on_moved
on_modified

此网站显示了我正在使用的代码: https://www.thepythoncorner.com/2019/01/how-to-create-a-watchdog-in-python-to-look-for-filesystem-changes/

This Website shows the code I am using: https://www.thepythoncorner.com/2019/01/how-to-create-a-watchdog-in-python-to-look-for-filesystem-changes/

我用re正常测试了Regex函数.这样做绝对好.但是，即使我尝试使用正则表达式条目:['\ w + .log']也无法正常工作.

I tested my Regex function normaly with re. This is doing absolutly fine. But even if I try the Regex Entry: ['\w+.log'] it did not work.

我为您提供我的正则表达式以了解我想做什么:

I provide you my Regex to understand what I want to do:

regexes = ["^Journal\.190901\d{6}\.\d{2}\.log$"]

每次更改一个.log文件时，我都希望收到一条消息，但这仅在使用PatternMatchingEventHAndle时发生

I expected a message everytime I change one of my .log-files but this is only happend i f i use the PatternMatchingEventHAndle

现在，我向您介绍我的最小示例:

Now I present you you my minimal Example:

import time
from watchdog.observers import Observer
from watchdog.events import RegexMatchingEventHandler

if __name__ == "__main__":
    regexes = ["^Journal\.190901\d{6}\.\d{2}\.log$"]
    ignore_regexes= []
    ignore_directories = False
    case_sensitive = True
    my_event_handler = RegexMatchingEventHandler(regexes,ignore_regexes,ignore_directories,case_sensitive)

    def on_modified(event):
        print(f"hey buddy, {event.src_path} has been modified")

    my_event_handler.on_modified = on_modified

# Observer
    path = "."
    go_recursively = True
    my_observer = Observer()
    my_observer.schedule(my_event_handler, path, recursive=go_recursively)

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

推荐答案

这只是事件处理程序返回的路径的模式，它从path中指定的文件夹根目录的路径开始( c4>在您的示例中).

This is just about the pattern of the path returned by the event handler, it begins by the path to the root of the folder specified in path (path = "." in your example) .

• 它可以帮助检查返回的路径的任何模式，并确切地检查您需要什么:

• It can help to inspect any patterns of the paths returned, and check what you need exactly:

regexes = ['.+']  # will match everything 

使用path = "."跟踪当前目录中的文件:

To track files in the current directory with path = ".":

# linux (example path : ./Journal[...].log)
regexes = ['^\./Journal\.190901\d{6}\.\d{2}\.log$']

# windows (example path : .\Journal[...].log)
regexes = ["^\.\\\\Journal\.190901\d{6}\.\d{2}\.log$"]

# both
regexes = ["^\.(/|\\\\)Journal\.190901\d{6}\.\d{2}\.log$"]

，如果您定义一个名为logs的子文件夹，并指定path = "logs"

if you define a subfolder named logs and you specify the root like path = "logs"

# (example path : logs/Journal[...].log or logs\Journal[...].log
regexes = ['^logs(/|\\\\)logs/Journal\.190901\d{6}\.\d{2}\.log$']

这篇关于如何正确运行看门狗的RegexMatchingEventHandler?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！