cleanroom

Install:

pip install cleanroom

Create instance in a new process and proxy all operations:

import os
import time
from cleanroom import create_instance, CleanroomArgs


class Cal:

    def __init__(self, base):
        self.base = base

    def inc(self):
        self.base += 1
        return self.base

    def pid(self, sleep=None):
        if sleep:
            time.sleep(sleep)

        return os.getpid()


cal = create_instance(Cal, CleanroomArgs(0))

print('Parent PID: ', os.getpid())
print('Cal PID: ', cal.pid())

print('inc: ', cal.inc())
print('inc: ', cal.inc())

Output:

Parent PID:  22239
Cal PID:  22272
inc:  1
inc:  2

Create multiple instances under the random_access scheduler:

from cleanroom import create_scheduler, create_instances_under_scheduler


scheduler = create_scheduler(instances=5, scheduler_type='random_access')
create_instances_under_scheduler(scheduler, Cal, CleanroomArgs(0))

print('Parent PID: ', os.getpid())

for _ in range(20):
    pid = scheduler.pid(sleep=1)
    print(time.ctime(), 'Cal PID:', pid)

Output:

Parent PID:  4376
Thu May 23 14:00:59 2019 Cal PID: 4399
Thu May 23 14:01:00 2019 Cal PID: 4403
Thu May 23 14:01:01 2019 Cal PID: 4397
Thu May 23 14:01:02 2019 Cal PID: 4397
Thu May 23 14:01:03 2019 Cal PID: 4403
Thu May 23 14:01:04 2019 Cal PID: 4399
Thu May 23 14:01:05 2019 Cal PID: 4395
Thu May 23 14:01:06 2019 Cal PID: 4401
Thu May 23 14:01:07 2019 Cal PID: 4399
Thu May 23 14:01:08 2019 Cal PID: 4395
Thu May 23 14:01:09 2019 Cal PID: 4401
Thu May 23 14:01:10 2019 Cal PID: 4401
Thu May 23 14:01:11 2019 Cal PID: 4403
Thu May 23 14:01:12 2019 Cal PID: 4395
Thu May 23 14:01:13 2019 Cal PID: 4397
Thu May 23 14:01:14 2019 Cal PID: 4403
Thu May 23 14:01:15 2019 Cal PID: 4401
Thu May 23 14:01:16 2019 Cal PID: 4395
Thu May 23 14:01:17 2019 Cal PID: 4395
Thu May 23 14:01:18 2019 Cal PID: 4397

Create multiple instances under the batch_random_access scheduler:

scheduler = create_scheduler(instances=5, scheduler_type='batch_random_access')
create_instances_under_scheduler(scheduler, Cal, CleanroomArgs(0))

print('Parent PID: ', os.getpid())

for pid in scheduler.pid(CleanroomArgs(sleep=1) for _ in range(20)):
    print(time.ctime(), 'Cal PID:', pid)

Output:

Parent PID:  4376
Thu May 23 14:04:47 2019 Cal PID: 4429
Thu May 23 14:04:47 2019 Cal PID: 4433
Thu May 23 14:04:47 2019 Cal PID: 4435
Thu May 23 14:04:48 2019 Cal PID: 4433
Thu May 23 14:04:48 2019 Cal PID: 4437
Thu May 23 14:04:49 2019 Cal PID: 4429
Thu May 23 14:04:49 2019 Cal PID: 4433
Thu May 23 14:04:49 2019 Cal PID: 4437
Thu May 23 14:04:49 2019 Cal PID: 4431
Thu May 23 14:04:49 2019 Cal PID: 4435
Thu May 23 14:04:50 2019 Cal PID: 4429
Thu May 23 14:04:51 2019 Cal PID: 4431
Thu May 23 14:04:51 2019 Cal PID: 4435
Thu May 23 14:04:51 2019 Cal PID: 4431
Thu May 23 14:04:51 2019 Cal PID: 4437
Thu May 23 14:04:53 2019 Cal PID: 4429
Thu May 23 14:04:53 2019 Cal PID: 4431
Thu May 23 14:04:53 2019 Cal PID: 4429
Thu May 23 14:04:53 2019 Cal PID: 4437
Thu May 23 14:04:53 2019 Cal PID: 4437

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