k3jobq 0.1.4

Concurrent job queue manager with multi-threading support

k3jobq

k3jobq processes a series of inputs with functions concurrently

k3jobq is a component of pykit3 project: a python3 toolkit set.

k3jobq is a manager to create cuncurrent tasks. It processes a series of inputs with functions concurrently and return once all threads are done::

def add1(args):
    return args + 1

def printarg(args):
    print(args)

k3jobq.run([0, 1, 2], [add1, printarg])
# > 1
# > 2
# > 3

Install

pip install k3jobq

Synopsis

#!/usr/bin/env python

import k3jobq

if __name__ == "__main__":

    def add1(args):
        return args + 1

    def multi2(args):
        return args * 2

    def printarg(args):
        print(args)

    k3jobq.run([0, 1, 2], [add1, printarg])
    # > 1
    # > 2
    # > 3

    k3jobq.run((0, 1, 2), [add1, multi2, printarg])
    # > 2
    # > 4
    # > 6

    # Specify number of threads for each job:

    # Job 'multi2' uses 1 thread.
    # This is the same as the above example.
    k3jobq.run(list(range(3)), [add1, (multi2, 1), printarg])
    # > 2
    # > 4
    # > 6

    # Create 2 threads for job 'multi2':

    # As there are 2 thread dealing with multi2, output order will not be kept.
    k3jobq.run(list(range(3)), [add1, (multi2, 2), printarg])
    # Output could be:
    # > 4
    # > 2
    # > 6

    # Multiple threads with order kept:

    # keep_order=True to force to keep order even with concurrently running.
    k3jobq.run(list(range(3)), [add1, (multi2, 2), printarg],
               keep_order=True)
    # > 2
    # > 4
    # > 6

    # timeout=0.5 specifies that it runs at most 0.5 second.
    k3jobq.run(list(range(3)), [add1, (multi2, 2), printarg],
               timeout=0.5)

    # Returning *k3jobq.EmptyRst* stops delivering result to next job:

    def drop_even_number(i):
        if i % 2 == 0:
            return k3jobq.EmptyRst
        else:
            return i

    k3jobq.run(list(range(10)), [drop_even_number, printarg])
    # > 1
    # > 3
    # > 5
    # > 7
    # > 9

Author

Zhang Yanpo (张炎泼) [e-mail]

Copyright and License

The MIT License (MIT)

Copyright (c) 2015 Zhang Yanpo (张炎泼) [e-mail]