+ def report_warning(self, message):
+ '''
+ Print the message to stderr, it will be prefixed with 'WARNING:'
+ If stderr is a tty file the 'WARNING:' will be colored
+ '''
+ if sys.stderr.isatty():
+ _msg_header=u'\033[0;33mWARNING:\033[0m'
+ else:
+ _msg_header=u'WARNING:'
+ warning_message=u'%s %s' % (_msg_header,message)
+ self.to_stderr(warning_message)
+