human
Complete the below
def imap(requests, prefetch=True, size=2):

    '''''
    '''
assistant
#Here is the Python program you requested.
    pool = Pool(size)
    def send(r):
        r.send(prefetch)
        return r.response
    for r in pool.imap_unordered(send, requests):
        (yield r)
    pool.join()