#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import logging
import random
import threading
import time

# begin boilerplate

try:
    random = random.SystemRandom()
    using_sysrandom = True
except NotImplementedError:
    import warnings
    warnings.warn('A secure pseudo-random number generator is not available '
                  'on your system. Falling back to Mersenne Twister.')
    using_sysrandom = False

# Set default logging handler to avoid "No handler found" warnings.
try:  # Python 2.7+
    from logging import NullHandler
except ImportError:
    class NullHandler(logging.Handler):
        def emit(self, record):
            pass

logger = logging.getLogger(__name__)
logger.addHandler(NullHandler())

# end boilerplate


class Task(threading.Thread):

    """A dummy task with a random execution time in the range [1, 10] seconds"""

    def run(self):
        logger.debug('%s: started', self.name)
        time.sleep(random.randint(1, 10))  # random wait [1, 10] sec
        logger.info('%s: done', self.name)


def main():
    tasks = [Task().start() for _ in range(10)]


if __name__ == '__main__':
    logging.basicConfig(level=logging.INFO)
    logger.setLevel(logging.DEBUG)
    main()