Антон Коновалов

from abc import ABC
import sys
from threading import Thread
from multiprocessing import Process

class Executor(ABC):
    @abstractmethod
    def execute(self, f):
        pass

class ThreadExecutor(Executor):
    def execute(self, f):
        Thread(target=f).start()

class ProcessExecutor(Executor):
    def execute(self, f):
        Process(target=f).start()

def func():
    print('Hello')

if __name__ == '__main___':
    executor = None
    if sys.argv[1] == 'thread':
        executor = ThreadExecutor()
    elif sys.argv[1] == 'process':
        executor = ProcessExecutor()
    else:
        print('Usage:\n\t{} <thread|process>\n'.format(sys.argv[0]), file=sys.stderr)
        sys.exit(1)

    executor.execute(func)

result = '{} and {} likes this'.format(', '.join(names[:-1]), names[-1])

result = f'{", ".join(names[:-1])} and {names[-1]} likes this'