How to use the pyalpm.LOG_DEBUG function in pyalpm

def cb_log(level, line):
	if not (level & _logmask):
		return
	if level & pyalpm.LOG_ERROR:
		line = "ERROR: " + line
	elif level & pyalpm.LOG_WARNING:
		line = "WARNING: " + line
	elif level & pyalpm.LOG_DEBUG:
		line = "DEBUG: " + line
	elif level & pyalpm.LOG_FUNCTION:
		line = "FUNC: " + line
	sys.stderr.write(line)

if "command failed to execute correctly" in line:
            # We get this warning sometimes (I think it's when Cnchi installs
            # the kernel package). It seems to be harmless, we'll log it as
            # a debug message instead of an error message
            logging.debug(line)
            return

        if level & pyalpm.LOG_ERROR == pyalpm.LOG_ERROR:
            logging.error(line)
        elif level & pyalpm.LOG_WARNING == pyalpm.LOG_WARNING:
            # Alpm outputs non-english log messages so we can't target certain
            # useless warnings. I think most of the warnings are useless anyway.
            # We can revisit this later if need be.
            logging.debug(line)
        elif level & pyalpm.LOG_DEBUG == pyalpm.LOG_DEBUG:
            # There are a lot of "extracting" messages (not very useful), so we
            # do not log them.
            if " error " in line and "error 0" not in line:
                logging.debug(line)
            elif "extracting" not in line and "extract: skipping dir extraction" not in line:
                logging.debug(line)

#except:
	#	_line = str(_line, encoding='latin-1').strip("\n")
	if not (level & _logmask):
		return
	if level & pyalpm.LOG_ERROR:
		ErrorDialog.format_secondary_text("ERROR: "+line)
		response = ErrorDialog.run()
		if response:
			ErrorDialog.hide()
			#t.release()
	elif level & pyalpm.LOG_WARNING:
		WarningDialog.format_secondary_text("WARNING: "+line)
		response = WarningDialog.run()
		if response:
			WarningDialog.hide()
	elif level & pyalpm.LOG_DEBUG:
		line = "DEBUG: " + line
		print(line)
	elif level & pyalpm.LOG_FUNCTION:
		line = "FUNC: " + line
		print(line)
	#sys.stderr.write(line)