From Newsgroup: comp.lang.python.announce

Dear pythoneers,

I'm pleased to announce version 3.0 of RSFile I/O Library, which adds
support for python 3.8, 3.9, and 3.10, drops support for Python<=3.5,
and strengthens testing on OSX.

RSFile provides cross-platform drop-in replacements for the classes of
the io module, and for the open() builtin.

Its goal is to provide a cross-platform, reliable, and comprehensive synchronous file I/O API, with advanced features like fine-grained
opening modes, shared/exclusive file record locking, thread-safety, disk
cache synchronization, file descriptor inheritability, and handy stat
getters (size, inode, times…).

Locking is performed using actual file record locking capabilities of
the OS, not by using separate files/directories as locking markers, or
other fragile gimmicks. Unix users might particularly be interested by
the workaround that this library provides, concerning the weird semantic
of fcntl() locks (when any descriptor to a disk file is closed, the
process loses ALL locks acquired on this file through any descriptor). Possible use cases for this library: concurrently writing to logs
without ending up with garbled data, manipulating sensitive data like disk-based databases, synchronizing heterogeneous producer/consumer
processes when multiprocessing semaphores aren’t an option…

https://pypi.org/project/RSFile/
https://rsfile.readthedocs.io/en/latest/
https://github.com/pakal/rsfile/

regards,

Pakal

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