Fix benchmarking for hiredis-py (#232)

Author: MugundanMCW

benchmark/benchmark.py

@@ -6,7 +6,7 @@
 
 import gevent
 from gevent import monkey
-from gevent.coros import Semaphore
+from gevent.lock import Semaphore
 monkey.patch_all()
 
 parser = optparse.OptionParser()
@@ -39,7 +39,7 @@ def run(clients):
   # Time how long it takes for all greenlets to finish
   join = partial(gevent.joinall, clients)
   time = timeit.timeit(join, number=1)
-  print "%.2f Kops" % ((len(commands) * count / 1000.0) / time)
+  print("%.2f Kops" % ((len(commands) * count / 1000.0) / time))
 
 # Let clients connect, and kickstart benchmark a little later
 clients = [gevent.spawn(create_client) for _ in range(options.clients)]