Sync chores

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We have a number of household chores to do. Each takes a couple of seconds for a machine to do while we have time to do something else. We also have one task, cleaning potatoes, that requires our full attention. It is a CPU-intensive process.

We also have two processes depending each other. We can turn on the dryer only after the washing machine has finished.

examples/async/sync_chores.py

import time

def boil_water(sec):
    print(f"Start boiling water for {sec} seconds")
    time.sleep(sec)
    print(f"End boiling water for {sec} seconds")

def washing_machine(sec):
    print("Start washing machine")
    time.sleep(sec)
    print("End washing machine")

def dryer(sec):
    print("Start dryer")
    time.sleep(sec)
    print("End dryer")

def dishwasher(sec):
    print("Start dishwasher")
    time.sleep(sec)
    print("End dishwasher")

def clean_potatoes(pieces):
    print("Start cleaning potatoes")
    for ix in range(pieces):
        print(f"Cleaning potato {ix}")
        time.sleep(0.5)
    print("End cleaning potatoes")

def main():
    dishwasher(3)
    washing_machine(3)
    dryer(3)
    boil_water(4)
    clean_potatoes(14)

start = time.time()
main()
end = time.time()
print(f"Elapsed {end-start}")

Start dishwasher
End dishwasher
Start washing machine
End washing machine
Start dryer
End dryer
Start boiling water for 4 seconds
End boiling water for 4 seconds
Start cleaning potatoes
Cleaning potato 0
Cleaning potato 1
Cleaning potato 2
Cleaning potato 3
Cleaning potato 4
Cleaning potato 5
Cleaning potato 6
Cleaning potato 7
Cleaning potato 8
Cleaning potato 9
Cleaning potato 10
Cleaning potato 11
Cleaning potato 12
Cleaning potato 13
End cleaning potatoes
Elapsed 20.017353534698486