Fluent Python: Clear, Concise, and Effective Programming

by Luciano Ramalho

from time import sleep, strftime from concurrent import futures def display(*args): print(strftime('[%H:%M:%S]'), end=' ') print(*args) def loiter(n): msg = '{}loiter({}): doing nothing for {}s...' display(msg.format('\t'*n, n, n)) sleep(n) msg = '{}loiter({}): done.' display(msg.format('\t'*n, n)) return n * 10 def main(): display('Script starting.') executor = futures.ThreadPoolExecutor(max_workers=3) results = executor.map(loiter, range(5)) display('results:', results) display('Waiting for individual results:') for i, result in enumerate(results): display(f'result {i}: {result}') if __name__ == '__main__': main()