diff --git a/offlineimap/ui/debuglock.py b/offlineimap/ui/debuglock.py
index 673efb0..4757453 100644
--- a/offlineimap/ui/debuglock.py
+++ b/offlineimap/ui/debuglock.py
@@ -17,19 +17,21 @@
 
 from threading import Lock, currentThread
 import traceback
+
 logfile = open("/tmp/logfile", "wt")
 loglock = Lock()
 
+
 class DebuggingLock:
     def __init__(self, name):
         self.lock = Lock()
         self.name = name
 
-    def acquire(self, blocking = 1):
+    def acquire(self, blocking=1):
         self.print_tb("Acquire lock")
         self.lock.acquire(blocking)
-        self.logmsg("===== %s: Thread %s acquired lock\n"%
-            (self.name, currentThread().getName()))
+        self.logmsg("===== %s: Thread %s acquired lock\n" %
+                    (self.name, currentThread().getName()))
 
     def release(self):
         self.print_tb("Release lock")
@@ -42,8 +44,6 @@ class DebuggingLock:
         loglock.release()
 
     def print_tb(self, msg):
-        self.logmsg(".... %s: Thread %s attempting to %s\n"% \
+        self.logmsg(".... %s: Thread %s attempting to %s\n" % \
                     (self.name, currentThread().getName(), msg) + \
                     "\n".join(traceback.format_list(traceback.extract_stack())))
-
-