Overview

Celery 5.2, released on January 2, 2022, adds Python 3.10 support and improves canvas primitives for task orchestration.

Main Features

Python 3.10 support

Celery 5.2 is fully compatible with Python 3.10, fixing issues related to changes in the collections module and new language features.

python 
from celery import Celery

app = Celery('demo', broker='redis://localhost:6379/0')

@app.task
def add(x: int, y: int) -> int:
    return x + y

# Asynchronous call
result = add.delay(4, 6)
print(result.get(timeout=10))  # 10

Canvas improvements

Canvas primitives (chain, group, chord) are more robust and better handle partial errors in task groups.

python 
from celery import chain, group, chord

# Task chain
workflow = chain(
    add.s(2, 3),
    add.s(10),
)  # (2+3) then result+10 = 15

# Parallel group with callback
workflow = chord(
    group(add.s(i, i) for i in range(5)),
    add.s(0),  # sum of results
)

Sources