def setStreamLevel(self,lvl=<NUM_LIT:20>):
<EOL>for i in range(<NUM_LIT:0>,len(self.handlers)):<EOL><INDENT>h = self.handlers[i]<EOL>if isinstance(h,logging.StreamHandler):<EOL><INDENT>self.removeHandler(h)<EOL>break<EOL><DEDENT><DEDENT>self.addStreamHandler(lvl)<EOL>
Set/change the level for the stream handler for a logging object.
Any file handlers will be left alone.
All messages of a higher severity level than 'lvl' will be printed 
to the screen.

Args:    
    lvl (int): The severity level of messages printed to the screen with 
            the stream handler, default = 20.