我有一个让我发疯的有趣问题。我有一个使用watchdog.observators.observator的python程序。该程序(又名watcher)监视文件夹,并在其中出现文件时作出响应。我有另一个程序(aka parser),它定期用文件填充关注的文件夹
这是我的观察者代码:
import os
import sys
import time
from watchdog.observers import Observer
from event_handler import ImagesEventHandler
from constants import ROOT_FOLDER, IMAGES_FOLDER, CWD
class ImagesWatcher:
def __init__(self, src_path):
self.__src_path = src_path
print(self.__src_path)
self.__event_handler = ImagesEventHandler()
self.__event_observer = Observer()
print("********** Inside ImagesWatcher --init__ method just after instantiating ImagesEventHandler and Observer **************")
def run(self):
print("********** Inside ImagesWatcher run method **************")
self.start()
try:
while True:
time.sleep(1)
except KeyboardInterrupt:
self.stop()
def start(self):
print("********** Inside ImagesWatcher start method **************")
self.__schedule()
self.__event_observer.start()
def stop(self):
print("********** Inside ImagesWatcher stop method **************")
self.__event_observer.stop()
self.__event_observer.join()
def __schedule(self):
print("********** Inside ImagesWatcher __schedule method **************")
print(self.__src_path)
self.__event_observer.schedule(
self.__event_handler,
self.__src_path,
recursive=True
)
if __name__ == "__main__":
src_path = sys.argv[1] if len(sys.argv) > 1 else CWD
src_path = os.path.abspath(src_path)
watch_path = os.path.join(src_path, ROOT_FOLDER)
watch_path = os.path.join(watch_path, IMAGES_FOLDER)
print('watch_path: ' + watch_path)
if not os.path.exists(watch_path):
os.makedirs(watch_path)
print('just created: ' + watch_path)
ImagesWatcher(watch_path).run()
以下是关联的事件处理程序代码:
import os
from PIL import Image
from watchdog.events import FileSystemEventHandler
from lambda_function import lambda_handler
from time import sleep
from os.path import dirname, abspath
class ImagesEventHandler(FileSystemEventHandler):
def __init__(self,):
print("********** Inside event handler __init__ method **************")
def on_created(self, event):
print("********** Inside event handler on_created method **************")
self.process(event)
def process(self, event):
print("********** Inside event handler process method **************")
sleep(2)
image = Image.open(event.src_path)
tracking_dir=os.path.join(dirname(dirname(abspath(event.src_path))),'Tracking')
print("******************** tracking_dir: ' + tracking_dir + ' ********************")
lambda_handler(image,tracking_dir)
监视程序的停止方法永远不会执行。执行事件处理程序的init方法,但既不执行on_,也不执行process方法
以下是我如何构建和运行docker容器:
docker build -t watcher -f docker/watcher/Dockerfile .
docker run -d --network onprem_network -v c:\My_MR:/code/My_MR --name watcher watcher
docker build -t parser -f docker/parser/Dockerfile .
docker run -d --network onprem_network -v c:\My_MR:/code/My_MR --name parser parser
我的观察者Dockerfile:
FROM python:3.7.9
ENV PYTHONUNBUFFERED 1
ENV PYTHONDONTWRITEBYTECODE 1
COPY requirements.txt /requirements.txt
RUN pip install --upgrade pip -r /requirements.txt && mkdir /code
WORKDIR /code
COPY . /code/
RUN apt update && apt-get update && apt install tesseract-ocr -y && apt-get install ffmpeg libsm6 libxext6 -y
CMD ["python", "/code/watcher.py"]
我的解析器Dockerfile:
FROM python:3.7.9
ENV PYTHONUNBUFFERED 1
ENV PYTHONDONTWRITEBYTECODE 1
COPY requirements.txt /requirements.txt
RUN pip install --upgrade pip -r /requirements.txt && mkdir /code
WORKDIR /code
COPY . /code/
RUN apt update && apt-get update && apt-get install ffmpeg -y
CMD ["python", "/code/parser.py"]
My requirements.txt:
Pillow == 5.4.1
gql == 3.0.0a5
matplotlib == 3.0.3
numpy == 1.16.2
opencv_python == 4.4.0.44
pandas == 0.24.2
pytesseract == 0.2.6
python_ffmpeg_video_streaming == 0.1.14
watchdog == 2.0.2
requests
tesseract
任何帮助都将不胜感激
watchdog用来监视linux文件系统事件的底层API称为inotify。委员会注意到:
您正在装载的目录
c:\My_MR
位于Windows文件系统上,因此watcher容器中的inotify不起作用相反,您可以使用linux文件系统路径从WSL2默认发行版中的运行docker,例如
~/my_mr
:当WSL2发行版使用
\\wsl$\
网络路径运行时,可以从Windows访问此目录,即\\wsl$\<Distro name>\home\<username>\my_mr
(更多信息here)。因此,我相信docker run
也可以从Windows使用带有-v
的\\wsl$\
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