Python watchdog event handler

Python watchdog event handler

Here is a Python watchdog event handler:

Watchdog Event Handler

The Watchdog library is used to monitor file system events, such as changes to files or directories. This event handler will detect any changes made to the files or directories it's monitoring.

Using Watchdog:

First, you need to install the watchdog package. You can do this using pip:

pip install watchdog

Here is a basic example of how to use the Watchdog library:

import logging
from watchdog.observers import Observer
from watchdog.events import FileSystemEventHandler
class MyHandler(FileSystemEventHandler):
def on_modified(self, event):
if event.is_directory:
print(f"Directory {event.src_path} has been modified")
else:
print(f"File {event.src_path} has been modified")
def on_created(self, event):
if event.is_directory:
print(f"Directory {event.src_path} has been created")
else:
print(f"File {event.src_path} has been created")
def on_deleted(self, event):
if event.is_directory:
print(f"Directory {event.src_path} has been deleted")
else:
print(f"File {event.src_path} has been deleted")
if name == "main":
path = "."  # monitor the current directory
event_handler = MyHandler()
observer = Observer()
observer.schedule(event_handler, path, recursive=True)
observer.start()
try:
while True:
pass
except KeyboardInterrupt:
observer.stop()
observer.join()

In this script, we define a class MyHandler which is inherited from FileSystemEventHandler. The on_modified, on_created, and on_deleted methods will be called when a file or directory is modified, created, or deleted, respectively.

How to use:

You can customize this script by adjusting the path to be monitored, or by adding more event handler methods (for example, on_moved, which is called when a file or directory is moved).

Remember that this is just an example. Depending on your specific use case, you might want to add additional features like handling exceptions, logging events, etc.

I hope this helps!

Python watchdog example github

Here is a detailed description of the Python watchdog project and how to use it:

Python Watchdog:

The Watchdog library in Python allows developers to monitor directory trees for changes, such as new files being added or existing ones being modified, and perform actions based on these changes. This can be useful for tasks like monitoring a folder for new files that need to be processed, or sending notifications when specific files change.

Installation:

To install the Watchdog library, you will need to run the following command in your terminal:

pip install watchdog

Basic Usage:

Here is an example of how to use the Watchdog library:

import time
from watchdog.observers import Observer
from watchdog.events import FileSystemEventHandler
class MyHandler(FileSystemEventHandler):
def on_modified(self, event):
print(f"{event.src_path} has been modified.")
if name == "main":
path = "."  # The path to watch for changes
event_handler = MyHandler()  # Create an instance of the handler
observer = Observer(timeout=1)  # Create an observer with a timeout of 1 second
observer.schedule(event_handler, path, recursive=True)  # Schedule the event handler
observer.start()  # Start the observer
try:
while True:
time.sleep(1)
except KeyboardInterrupt:
observer.stop()
observer.join()

In this example, we create an instance of the MyHandler class, which is a subclass of FileSystemEventHandler. The on_modified method will be called whenever a file in the watched directory changes.

We then schedule our event handler with the observer and start it. We put the script into an infinite loop to keep the observer running until we manually stop it (e.g., by pressing Ctrl+C).

GitHub:

The Python Watchdog library has its own GitHub repository, where you can find the source code, documentation, and community contributions.

Here is a link to the main page of the Python Watchdog GitHub repository:

https://github.com/python-watchdog/watchdog

Contributing:

If you would like to contribute to the Python Watchdog project, you can start by checking out the code and running the tests. You can also submit issues or pull requests through the GitHub interface.

Here is a link to the Python Watchdog GitHub repository:

https://github.com/python-watchdog/watchdog

Conclusion:

The Watchdog library in Python allows developers to monitor directory trees for changes, such as new files being added or existing ones being modified, and perform actions based on these changes. This can be useful for tasks like monitoring a folder for new files that need to be processed, or sending notifications when specific files change.

By following the steps outlined above, you can install and use the Watchdog library in your own Python projects.