trio learning

simple.py

# License - MIT / do whatever

## rev3 - add result gathering

async def child(name, journal):
    print(f"{name}: My name is: " + name)
    staytime = random.randint(1, 3)
    print(f"{name}: I will stay for {staytime} seconds.")
    print(f"{name}: I will jot down my name in the journal")
    journal.append(name)
    await trio.sleep(staytime)
    print(f"{name}: Leaving nursery.")


async def run():
    print("Opening nursery.")
    results = []
    async with trio.open_nursery() as nursery:
        print("Nursery open.")
        nursery.start_soon(child, 'olof', results)
        nursery.start_soon(child, 'gustav', results)
        print("All children have been welcomed.")
    print("Nursery closed - children left.")
    print(f"Result is: {results}")

if __name__ == '__main__':
    trio.run(run)


## rev2 - add nicer output, random sleep

async def child(name):
    print(f"{name}: My name is: " + name)
    staytime = random.randint(1, 4)
    print(f"{name}: I will stay for {staytime} seconds.")
    await trio.sleep(staytime)
    print(f"{name}: Leaving nursery.")


async def run():
    print("Opening nursery.")
    async with trio.open_nursery() as nursery:
        print("Nursery open.")
        nursery.start_soon(child, 'olof')
        nursery.start_soon(child, 'gustav')
        print("All children have been welcomed.")
    print("Nursery closed - children left.")

if __name__ == '__main__':
    trio.run(run)


## rev1 - working version with await

from __future__ import print_function

import trio

async def child(name):
    print("My name is: " + name)
    await trio.sleep(1)

async def run():
    print("Opening nursery.")
    async with trio.open_nursery() as nursery:
        print("Nursery open.")
        nursery.start_soon(child, 'olof')
        nursery.start_soon(child, 'gustav')
        print("All children have been welcomed.")
    print("Nursery closed - children left.")

if __name__ == '__main__':
    trio.run(run)

## rev0 - program skeleton but forgot await

from __future__ import print_function

import trio

def child(name):
    print("My name is: " + name)
    trio.sleep(1)

def run():
    print("Opening nursery.")
    with trio.open_nursery() as nursery:
        print("Nursery open.")
        nursery.start_soon(child, 'olof')
        nursery.start_soon(child, 'gustav')
        print("All children have been welcomed.")
    print("Nursery closed - children left.")

if __name__ == '__main__':
    run()