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Asynchronous task scheduler and runner for Python

Project Description

Task scheduler based on asyncio. Allows max-concurrency and granularity to be specified. Execution results are printed as a Gantt chart.

Sample Usage

from asynctasks.executor import Executor
from asynctasks.executionplan import ExecutionPlan
import asyncio

#create an array of tasks
tasks_dict_array = [{"dependencies": [], "name": "task0"}, {"dependencies": [0], "name": "task1"},
                        {"dependencies": [1], "name": "task2"}, {"dependencies": [0], "name": "task3"},
                        {"dependencies": [], "name": "task4"}, {"dependencies": [], "name": "task5"}]

#define an async function that should be executed for each task
async def print_task(loop, task):
   print("Executing task {}".format(task))
   await asyncio.sleep(0.1)

#create an execution plan for the tasks
plan = ExecutionPlan().from_dict_array(tasks_dict_array)
print("\nBEFORE EXECUTION\n{}".format(plan))

#execute the plan with print_task function and max_concurrency as 2
Executor(plan, 2, 0.01, print_task).trigger_execution()
print("\nAFTER EXECUTION\n{}".format(plan.as_gantt()))

Sample Output

BEFORE EXECUTION
task0 Ready
    task1
        task2
    task3
task4 Ready
task5 Ready

Executing task {'dependencies': [], 'name': 'task0', 'start_time': 1497528994.1246588}
Executing task {'dependencies': [], 'name': 'task4', 'start_time': 1497528994.1246588}
Executing task {'dependencies': [0], 'name': 'task1', 'start_time': 1497528994.236074}
Executing task {'dependencies': [0], 'name': 'task3', 'start_time': 1497528994.2370954}
Executing task {'dependencies': [1], 'name': 'task2', 'start_time': 1497528994.340769}
Executing task {'dependencies': [], 'name': 'task5', 'start_time': 1497528994.3417716}

AFTER EXECUTION
      ....................................................................................................
task0 ...............................
task1                                   .............................
task2                                                                    ................................
task3                                    .............................
task4 ...............................
task5                                                                     ...............................
Release History

Release History

This version
History Node

0.1.4

History Node

0.1.3

History Node

0.1.2

History Node

0.1.1

History Node

0.1

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asynctasks-0.1.4-py3-none-any.whl (7.1 kB) Copy SHA256 Checksum SHA256 3.5 Wheel Jun 15, 2017

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