Synchronize Multiple Applications with File Locks in Python

In this video we learn how to synchronize multiple Python applications using file locks.

◾◾◾◾◾◾◾◾◾◾◾◾◾◾◾◾◾
📚 Programming Books & Merch 📚

💼 Services 💼

🌐 Social Media & Contact 🌐

[amirchegg]

How about a video on ChatGPT "Custom Instructions"? What custom instructions to use (as a python developer) to get the best answers? Would be a cool video. Looking forward for it!❤

[JorgeEscobarMX]

0:00 This sounds interesting, I do use the threading and multiprosessing modules for computing and saving files that don't have to be touched by other threads, but sync writes into files are impossible to me.

[zulucharlie]

Great video and topic - very helpful, thank you.

[unperrier]

Be careful that not all filesystems support file locking and even when they support it (e.g. ext4) it can be disabled for some reason.

[bipinrajeshtatkare]

Can you elaborate with an example of why we use synchronisation with file locks?

[unperrier]

File locking is not meant to synchronize applications, there are better abstractions offered by the kernel for that (e.g. pipes, shared memory, semaphores, etc)
File locking is meant to prevent multiple processes from mutating the same file simultaneously.

[abdulwaleedjulaid]

I can 't see your video blurry please zoom your video
Python intermedate please make your video python

[thomasgoodwin]

As always major coolness. For some reason it reminded me of a scenario I have encountered a few times, but never found a solution for.
It goes something like this: I have an app, that looks for ZZZ files in a given directory. The problem is the program crashes if it see more than 256 files in that directory, but unfortunately we have 1000s of actual files we would like to use in a mix and match scenario.
Is there any way to hook the OS so that instead of the OS simply feeding the requesting app every file, our app intercepts it and only send a curated 256 at a time.
I know about symbolic linking, but that doesn't seem to allow for linking to an api rather than some physical device. Is there an easier way to do this, or would it wind up being full dive into the murky waters of device drivers?
🦾👀👍