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""" | ||
++++++++ | ||
chainlet | ||
++++++++ | ||
The ``chainlet`` library offers a lightweight model to create processing pipelines from | ||
generators, coroutines, functions and custom objects. | ||
Instead of requiring you to nest code or insert hooks, ``chainlet`` offers a concise, intuitive binding syntax: | ||
.. code:: python | ||
# regular nested generators | ||
csv_writer(flatten(xml_reader(path='data.xml'), join='.'.join), path='data.csv') | ||
# chainlet pipeline | ||
xml_reader(path='data.xml') >> flatten(join='.'.join) >> csv_writer(path='data.csv') | ||
Processing pipelines created with ``chainlet`` are an extension of generators and functions: | ||
they can be iterated to pull results, called to push input or even used to get/fetch a stream of data. | ||
The bindings of ``chainlet`` allow to compose complex processing chains from simple building blocks. | ||
Creating new chainlets is simple, requiring you only to define the processing of data. | ||
It is usually sufficient to use regular functions, generators or coroutines, and let ``chainlet`` handle the rest: | ||
.. code:: python | ||
@chainlet.genlet | ||
def moving_average(window_size=8): | ||
buffer = collections.deque([(yield)], maxlen=window_size) | ||
while True: | ||
new_value = yield(sum(buffer)/len(buffer)) | ||
buffer.append(new_value) | ||
Features | ||
======== | ||
We have designed ``chainlet`` to be a simple, intuitive library: | ||
* Modularize your code with small, independent processing blocks. | ||
* Intuitively compose processing chains from individual elements. | ||
* Automatically integrate functions, generators and coroutines in your chains. | ||
* Extend your processing capabilities with complex chains that fork and join as needed. | ||
Under the hood, ``chainlet`` merges iterator and functional paradigms in a minimal fashion to stay lightweight. | ||
* Fully compliant with the Generator interface to integrate with existing code. | ||
* Implicit tail recursion elimination for linear pipelines, and premature end of chain traversal. | ||
* Push and pull chains iteratively, continuously, or even asynchronously. | ||
* Simple interface to extend or supersede pipeline traversal and processing. | ||
At its heart ``chainlet`` strives to be as Pythonic as possible: | ||
You write python, and you get python. | ||
No trampolines, callbacks, stacks, handlers, ... | ||
We take care of the ugly bits so you do not have to. | ||
Looking to get started? | ||
Check out our docs: |docs| | ||
Found an issue or have suggestions? | ||
Head straight to our issue tracker: |issues| | ||
Status | ||
====== | ||
The ``chainlet`` library originates from our need for accessible concurrency in data center administration. | ||
We have since adopted the library in a production environment for a number of use cases: | ||
* Modular monitoring suite using stream based data extraction and translation. | ||
* Management scripts for concurrent operations on many files at once. | ||
Both the grammar and general interfaces for processing chains, trees and graphs are stable. | ||
Ongoing work is mainly focused on streamlining the parallel iteration interface. | ||
A major focus is to add automatic concurrency, asynchronicity and parallelism. | ||
Our target is an opt-in approach to features from functional programming and static optimisations. | ||
Recent Changes | ||
-------------- | ||
v1.3.0 | ||
Thread-based concurrent traversal, improved single- and multi-stream distinction. | ||
v1.2.0 | ||
Synchronous concurrent traversal, chain slicing and merging, fully featured function and generator wrappers | ||
v1.1.0 | ||
Added chainlet versions of builtins and protocol interfaces | ||
v1.0.0 | ||
Initial release | ||
.. |docs| image:: https://readthedocs.org/projects/chainlet/badge/?version=latest | ||
:target: http://chainlet.readthedocs.io/en/latest/?badge=latest | ||
:alt: Documentation Status | ||
.. |issues| image:: https://img.shields.io/github/issues/maxfischer2781/chainlet.svg | ||
:target: https://github.com/maxfischer2781/chainlet/issues | ||
:alt: Open Issues | ||
""" | ||
|
||
__title__ = 'chainlet' | ||
__summary__ = 'Framework for linking generators/iterators to processing chains, trees and graphs' | ||
__url__ = 'https://github.com/maxfischer2781/chainlet' | ||
|
||
__version__ = '1.3.0' | ||
__version__ = '1.3.1' | ||
__author__ = 'Max Fischer' | ||
__email__ = 'maxfischer2781@gmail.com' | ||
__copyright__ = '2016 - 2018 %s' % __author__ |
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