Small exception block for ArcGIS geoprocessing tools

ArcGIS_gp_exception_block_python.py

    import sys
    import traceback
    
    except arcpy.ExecuteError:
        # Get the tool error messages
        msgs = arcpy.GetMessages()
        arcpy.AddError(msgs)
        print(msgs)

    except:
        # Get the traceback object
        tb = sys.exc_info()[2]
        tbinfo = traceback.format_tb(tb)[0]

        # Concatenate information together concerning the error into a message string
        pymsg = "PYTHON ERRORS:\nTraceback info:\n" + tbinfo + \
                "\nError Info:\n" + str(sys.exc_info()[1])
        msgs = "ArcPy ERRORS:\n" + arcpy.GetMessages() + "\n"

        # Return python error messages for use in script tool or Python Window
        arcpy.AddError(pymsg)
        arcpy.AddError(msgs)
        # Print Python error messages for use in Python / Python Window
        print(pymsg + "\n")
        print(msgs)