For script tools and stand-alone scripts (scripts run outside of an ArcGIS application), you can determine whether history logging is active using the GetLogHistory function.
The history log file is an Extensible Markup Language (XML) file that contains information about each geoprocessing operation. The information contained in the log file is essentially the same as that found in the Results window.
True, if geoprocessing logging history is enabled.
If geoprocessing log history is active, disable logging.
import arcpy if arcpy.GetLogHistory(): arcpy.SetLogHistory(False)