How deeply does Building LLM Applications with DSPy cover asyncio.run?

Explains loop creation, coroutine startup, repeat calls, and the restriction against simultaneous event loops.

Asyncio.run

As explained in Building LLM Applications with DSPy

asyncio.run is a function that runs an asynchronous entry-point coroutine in a new event loop.

asyncio.run(coro) creates an event loop and starts an async entry-point coroutine. It may be called more than once, but two event loops cannot run simultaneously. In Jupyter, an existing event loop can complicate its use; applying nest_asyncio is one way to allow nested loops. section 7.5.1

Listing 7.17 asyncio example

import asyncio
import time

async def func1():
    print("Start func1")
    await asyncio.sleep(5)
    print("End func1")
    return "func1 complete"

async def func2():
    print("Start func2")
    await asyncio.sleep(3)
    print("End func2")
    return "func2 complete"

async def main():
    start_time = time.time()
    co_routines = asyncio.gather(func1(), func2())
    a, b = await co_routines
    print(a, b)
    end_time = time.time()
    print("time", end_time-start_time)

asyncio.run(main())

See asyncio.run start main(), which gathers two sleep-based coroutines and prints their results and elapsed time. section 7.5.1

How Building LLM Applications with DSPy covers it

Cover of Building LLM Applications with DSPy

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Also explained in

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Python Concurrency with asyncioasyncio.run is a high-level function that executes an asynchronous entry-point coroutine in a newly managed event loop and performs shutdown cleanup.

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Related concepts

coroutineuses · A coroutine is a computation that can suspend and later resume execution while retaining its state, enabling cooperative transfer of control.
event loopproduces · An event loop is a runtime mechanism that repeatedly selects ready events or tasks and dispatches their associated work for execution.
asyncio.run_coroutine_threadsafealternative to · asyncio.run_coroutine_threadsafe is an asyncio function that submits a coroutine to an event loop from another thread and returns a concurrent.futures future.
debugging modeconfigures · Debugging mode is a software configuration or execution state that enables diagnostic facilities for examining and troubleshooting program behavior.
asyncio.new_event_loopalternative to · asyncio.new_event_loop is a Python API function that creates and returns a new event loop.

This explainer was generated by Manning's knowledge graph from the text of Building LLM Applications with DSPy. The section links point to the parts of the book it draws on.