Skip to main content

directed acyclic gather

Project description


dagather (directed acyclic gather) is a new way to plan out and schedule asynchronous tasks. The tasks are organized, with each task specifying the tasks that come before it. The tasks are then run in topological order, ensuring that each operation will start as soon as it is able to without waiting for routines it does not need.

from asyncio import sleep
from dagather import Dagather

foo = Dagather()

# add a new task to the task list
async def a():
    await sleep(1)
    return 12

async def b(a):
    # we now specify that a is a requirement for this task,
    # meaning that b will not be called until a has finished.
    # during runtime, a's value will be the return value of the
    # a task
    assert a == 12
    await sleep(2)

async def c(a):
    await sleep(1)
    return 'testing'

async def d():
    await sleep(1)

async def e(d, c):
    await sleep(1)

result = await foo()
# when foo is called, it runs each of its registered tasks 
# as soon as all its dependencies are finished.
# once all the tasks are finished, it will return a dict
# mapping each task to its return value.
assert result == {
    a: 12,
    b: None,
    c: 'testing',
    d: None,
    e: None

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

dagather-0.1.0.tar.gz (7.8 kB view hashes)

Uploaded Source

Built Distribution

dagather-0.1.0-py3-none-any.whl (9.2 kB view hashes)

Uploaded Python 3

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page