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.
When log history is activated, after each geoprocessing tool is run, an entry with the information about the tool will be added to:
True, if geoprocessing logging history is enabled.
If geoprocessing log history is active, disable logging.
import arcpy if arcpy.GetLogHistory(): arcpy.SetLogHistory(False)