问题
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.
Extension: I use Watchdog with the functions:
on_created
on_deleted
on_moved
on_modified
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/
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.
I provide you my Regex to understand what I want to do:
regexes = ["^Journal\.190901\d{6}\.\d{2}\.log$"]
I expected a message everytime I change one of my .log-files but this is only happend i f i use the PatternMatchingEventHAndle
EDIT: Now I present you you my minimal Example:
import time
from watchdog.observers import Observer
from watchdog.events import RegexMatchingEventHandler
if __name__ == "__main__":
regexes = ["^Journal\.190901\d{6}\.\d{2}\.log$"]
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()
回答1:
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) .
It can help to inspect any patterns of the paths returned, and check what you need exactly:
regexes = ['.+'] # will match everything
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$"]
if you define a subfolder named
logs
and you specify the root likepath = "logs"
# (example path : logs/Journal[...].log or logs\Journal[...].log regexes = ['^logs(/|\\\\)logs/Journal\.190901\d{6}\.\d{2}\.log$']
来源:https://stackoverflow.com/questions/57746487/how-to-run-the-regexmatchingeventhandler-of-watchdog-correctly