CODEWITHSUNDEEP
python-3.xasynchronousrecursionasync-awaitpython-asyncio
Greg
Greg

Reputation: 8915

How to write a recursive function which performs tasks asynchronously?

How to create a recursive coroutine function in python?

import asyncio

def fetch_url(x):
    if isinstance(x, list):
        return map(fetch_url, x)
    else:
        return parsed_url(x)

That is when double(10) is called the function will be executed synchronously and whilst when double([2,3,4]) is called it would execute asynchronously.

Upvotes: 1

Views: 2153

Answers (1)

Udi
Udi

Reputation: 30472

If by "would execute asynchronously" you mean "in parallel", try this:

async def fetch_url(x):
    if isinstance(x, list):
        return await asyncio.gather(*[fetch_url(url) for url in x])

    return parsed_url(x)

Upvotes: 4

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