code: def py_log_level(self, default='none'):
          ''' Set the log level for python Bokeh code.
  
          '''
          level = self._get_str("PY_LOG_LEVEL", default, "debug")
          LEVELS = {'trace': logging.TRACE,
                    'debug': logging.DEBUG,
                    'info' : logging.INFO,
                    'warn' : logging.WARNING,
                    'error': logging.ERROR,
                    'fatal': logging.CRITICAL,
                    'none' : None}
          return LEVELS[levelf py_log_level(self, default='none'):
          ''' Set the log level for python Bokeh code.
  
          '''
          level = self._get_str("PY_LOG_LEVEL", default, "debug")
          LEVELS = {'trace': logging.TRACE,
                    'debug': logging.DEBUG,
                    'info' : logging.INFO,
                    'warn' : logging.WARNING,
                    'error': logging.ERROR,
                    'fatal': logging.CRITICAL,
                    'none' : None}
          return LEVELS[level]
docs: Set the log level for python Bokeh code.