Don't try to write bytes in the LoggingConnection file

Close #483

NEWS

@@ -27,6 +27,8 @@ New features:
 - `~cursor.callproc()` now accepts a dictionary of parameters (:ticket:`#381`).
 - Using Python C API decoding functions and codecs caching for faster
   unicode encoding/decoding (:ticket:`#473`).
+- Fixed error caused by missing decoding `~psycopg2.extras.LoggingConnection`
+  (:ticket:`#483`).
 
 Other changes:
 

lib/extras.py

@@ -395,6 +395,8 @@ class LoggingConnection(_connection):
     def _logtofile(self, msg, curs):
         msg = self.filter(msg, curs)
         if msg:
+            if _sys.version_info[0] >= 3 and isinstance(msg, bytes):
+                msg = msg.decode(_ext.encodings[self.encoding], 'replace')
             self._logobj.write(msg + _os.linesep)
 
     def _logtologger(self, msg, curs):