同时运行 jupyter notebook 单元？

Question

I am trying to run 2 jupyter notebook cells simultaneously.

First, I define

import time
list1 = ["a"]

Then i want to run the following

go = True
while go==True:
    time.sleep(1)
    print(list1)

While the cell above is running, i want to be able to update list1 and see the updated output in the cell above ie run another cell

list1.append("b")

I have looked into using ipyparallel package and tried to use this answer and documentation with no success Is there a way to run multiple cells simultaneously in IPython notebook?

Does anyone know how to do this?

Thanks

Answer 1

You can use multiprocess module in order to run parallel cells

You probably need to use multiprocess Manager 's list and Value in order to get shared variables between threads

import time
from multiprocess import Manager, Process, Value

manager = Manager()
list1 = manager.list(["a"])
go = Value('b', True)

def worker(list1, go):
    while go.value:
        time.sleep(1)
        print(list1)
    return

p = Process(target=worker, args=(list1, go))
p.start()

To update list1 in another cell, you can try something like mentioned above

list1.append("b")

To update go , you can set its value property to be the value you want

go.value = True # This will output list1 in worker
go.value = False # This exit worker while loop