Format code according to pep8.

replace get_client_path("/members?recursive=true") with members()
replace do-plpgsq block by simple sql

governor.py

@@ -1,6 +1,10 @@
 #!/usr/bin/env python
 
-import sys, os, yaml, time, urllib2, atexit
+import sys
+import yaml
+import time
+import urllib2
+import atexit
 import logging
 
 from helpers.etcd import Etcd
@@ -19,6 +23,8 @@ postgresql = Postgresql(config["postgresql"])
 ha = Ha(postgresql, etcd)
 
 # stop postgresql on script exit
+
+
 def stop_postgresql():
     postgresql.stop()
 atexit.register(stop_postgresql)
@@ -63,9 +69,10 @@ while True:
 
     # create replication slots
     if postgresql.is_leader():
-        for node in etcd.get_client_path("/members?recursive=true")["node"]["nodes"]:
-            member = node["key"].split('/')[-1]
-            if member != postgresql.name:
-                postgresql.query("DO LANGUAGE plpgsql $$DECLARE somevar VARCHAR; BEGIN SELECT slot_name INTO somevar FROM pg_replication_slots WHERE slot_name = '%(slot)s' LIMIT 1; IF NOT FOUND THEN PERFORM pg_create_physical_replication_slot('%(slot)s'); END IF; END$$;" % {"slot": member})
+        for member in etcd.members():
+            if member['hostname'] != postgresql.name:
+                postgresql.query("""SELECT pg_create_physical_replication_slot(%s)
+                                     WHERE NOT EXISTS (SELECT 1 FROM pg_replication_slots
+                                     WHERE slot_name = %s)""", member['hostname'], member['hostname'])
 
     time.sleep(config["loop_wait"])