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extras/kitchen_asyncio/kitchen_asyncio_async.py

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+import argparse
+import asyncio
+import random
+import sys
+
+from kitchen_serial import parse_args
+
+async def do_work(duration, result):
+    t = random.uniform(duration/5 * 0.5, duration/5 * 1.5)
+    # t = duration / 5
+    await asyncio.sleep(t)
+    return result
+
+async def fetch_olive_oil():
+    print('Fetching olive oil…')
+    return await do_work(5, 'oil')
+
+async def fetch_dako_rusk():
+    print('Fetching dako rusk…')
+    return await do_work(5, 'rusk')
+
+async def fetch_tomato():
+    print('Fetching tomato…')
+    return await do_work(3, 'tomato')
+
+async def fetch_feta():
+    print('Fetching feta…')
+    return await do_work(3, 'feta')
+
+async def chop_tomato(tomato):
+    assert tomato == 'tomato'
+    print('Chopping tomato…')
+    return await do_work(1, f'chopped {tomato}')
+
+async def water_rusk(rusk):
+    assert rusk == 'rusk'
+    print('Watering rusk…')
+    return await do_work(0.2, f'wet {rusk}')
+
+async def oil_rusk(rusk, oil):
+    assert rusk == 'wet rusk'
+    assert oil == 'oil'
+    print(f'Pouring {oil} on {rusk}…')
+    return await do_work(0.5, f'{rusk} with {oil}')
+
+async def decorate_rusk(rusk, *toppings):
+    result = rusk
+    for topping in toppings:
+        print(f'Putting {topping} on {result}…')
+        result = await do_work(1, f'{result} with {topping}')
+    return result
+
+async def store_dako(dako):
+    print(f'Storing {dako}')
+    await do_work(1, None)
+
+async def prepare_rusk():
+    rusk = await fetch_dako_rusk()
+    rusk = await water_rusk(rusk)
+    return rusk
+
+async def prepare_tomato():
+    tomato = await fetch_tomato()
+    tomato = await chop_tomato(tomato)
+    return tomato
+
+async def prepare_oiled_rusk():
+    rusk = prepare_rusk()
+    oil = fetch_olive_oil()
+    rusk, oil = await asyncio.gather(rusk, oil)
+
+    return await oil_rusk(rusk, oil)
+
+async def prepare_dako():
+    print('Making dako…')
+    rusk = prepare_oiled_rusk()
+    tomato = prepare_tomato()
+    feta = fetch_feta()
+    parts = await asyncio.gather(rusk, tomato, feta)
+    dako = await decorate_rusk(*parts)
+    await store_dako(dako)
+    print(f'{dako} is ready!')
+
+async def prepare_dakos(n_dakos):
+    tasks = [prepare_dako()
+             for n in range(args.n_dakos)]
+    await asyncio.gather(*tasks)
+
+if __name__ == '__main__':
+    args = parse_args()
+    asyncio.run(
+        prepare_dakos(args.n_dakos)
+    )