Update examples

Author: methane

example.py renamed to example/example.py

@@ -0,0 +1,38 @@
+#!/usr/bin/env python
+from __future__ import print_function
+
+import random
+from tornado import ioloop, gen
+from tornado_mysql import pools
+
+
+pools.DEBUG = True
+
+
+POOL = pools.Pool(
+    dict(host='127.0.0.1', port=3306, user='root', passwd='', db='mysql'),
+    max_idle_connections=2,
+    max_recycle_sec=3,
+    max_open_connections=5,
+)
+
+
+@gen.coroutine
+def worker(n):
+    for i in range(20):
+        t = random.random() * 5
+        print(n, "sleeping", t, "seconds")
+        cur = yield POOL.execute("SELECT SLEEP(%s)", (t,))
+        print(n, cur.fetchall())
+        yield gen.sleep(t)
+
+
+@gen.coroutine
+def main():
+    workers = [worker(i) for i in range(10)]
+    yield workers
+
+
+ioloop.IOLoop.current().run_sync(main)
+print(POOL._opened_conns)
+