[py3] file() doesn't exist in python3

logilab/common/daemon.py

@@ -91,7 +91,7 @@ def daemonize(pidfile=None, uid=None, umask=0o77):
         piddir = os.path.dirname(pidfile)
         if not os.path.exists(piddir):
             os.makedirs(piddir)
-        f = file(pidfile, "w")
+        f = open(pidfile, "w")
         f.write(str(os.getpid()))
         f.close()
     # set umask if specified