gevent-cooperative child processes and inter-process communication.
gipc (pronunciation “gipsy”) provides reliable child process management and inter-process communication (IPC) in the context of gevent.
Usage of Python’s multiprocessing package in the context of a gevent-powered application may raise problems and most likely breaks the application in various subtle ways. gipc is developed with the motivation to solve many of these issues transparently. With gipc, multiprocessing.Process-based child processes can safely be created anywhere within your gevent-powered application. The API of multiprocessing.Process objects is provided in a gevent-cooperative fashion. Furthermore, gipc comes up with a pipe-based transport layer for gevent-cooperative inter-process communication and useful helper constructs. gipc is lightweight and simple to integrate.
Please visit https://gehrcke.de/gipc for finding API documentation, code examples, and in-depth information.
The current version of gipc has been tested on CPython 2.6/2.7/3.3/3.4. It requires gevent 1.1 and supports both, Linux and Windows.
Is gipc reliable?
This is an important question, because the matter gipc is dealing with (a delicate combination of fork, threads, leightweight threads, signals, and an event loop library) bears the potential for various kinds of corner-case disasters. The best answer probably is that gipc is backed by an extensive unit test suite and the following projects are happily making use of it:
Are you successfully using gipc in your project? I would appreciate if you dropped me a quick line.
Unit tests and code audit
If you run into troubles with gipc, it is a good idea to run the unit test suite under your conditions. gipc’s unit tests are written for pytest. With gipc/test (included in the release) being the current working directory, I usually run tests like this:
$ py.test -v
Other than that, I use pep8 and pylint for code audit. Have a look at audit.sh in the code repository. Unit test code coverage analysis requires coverage and pytest-cov. audit.sh leaves behind a coverage HTML report in the test directory.
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