examples: xrange() -> range()

for python3 compatibility (#38)

examples/dns_mass_resolve.py

@@ -34,7 +34,7 @@ def job(url):
         finished += 1
 
 with gevent.Timeout(2, False):
-    for x in xrange(10, 10 + N):
+    for x in range(10, 10 + N):
         pool.spawn(job, '%s.com' % x)
     pool.join()
 

examples/psycopg2_pool.py

@@ -143,7 +143,7 @@ if __name__ == '__main__':
     import time
     pool = PostgresConnectionPool("dbname=postgres", maxsize=3)
     start = time.time()
-    for _ in xrange(4):
+    for _ in range(4):
         gevent.spawn(pool.execute, 'select pg_sleep(1);')
     gevent.wait()
     delay = time.time() - start

examples/threadpool.py

@@ -5,7 +5,7 @@ from gevent.threadpool import ThreadPool
 
 pool = ThreadPool(3)
 start = time.time()
-for _ in xrange(4):
+for _ in range(4):
     pool.spawn(time.sleep, 1)
 gevent.wait()
 delay = time.time() - start