import hashlib
from threading import Thread, Semaphore
import sys

MAX_THREADS = 10
BUFFER_SIZE = 1024*512

class MD5File(Thread):
    def __init__(self, filename, lock):
        Thread.__init__(self)
        self.filename = filename
        self.md5 = None
        self.lock = lock

    def run(self):
        hash = hashlib.md5()
        with open(self.filename, 'rb') as fp:
            while True:
                data = fp.read(BUFFER_SIZE)
                if not len(data):
                    break
                hash.update(data)
        print("%s %s" % (hash.hexdigest(), self.filename))
        self.lock.release()

class Program:
    def __init__(self):
        self.threads = []
        self.number_lock = Semaphore(MAX_THREADS)

    def main(self):
        for filename in sys.argv[1:]:
            self.number_lock.acquire()
            thread = MD5File(filename, self.number_lock)
            thread.start()
            self.threads.append(thread)

        for thread in self.threads:
            thread.join()

if __name__ == "__main__":
    Program().main()