adjust python perf-test script

Author: copperlight

docs/spectator/lang/py/perf-test.md

@@ -10,13 +10,13 @@ Test maximum single-threaded throughput for two minutes.
 import logging
 import time
 
-from spectator import Config, Registry
-
 logging.basicConfig(
     level=logging.INFO,
     format='%(asctime)s - %(name)s - %(levelname)s - %(thread)d - %(message)s'
 )
 
+from spectator import Config, Registry
+
 location = "udp"
 # location = "unix"
 registry = Registry(Config(location))