Python arcpy.AddError() Examples

def PrintMsg(msg, severity=0):
    # Adds tool message to the geoprocessor
    #
    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
            if severity == 0:
                arcpy.AddMessage(string)

            elif severity == 1:
                arcpy.AddWarning(string)

            elif severity == 2:
                arcpy.AddMessage("    ")
                arcpy.AddError(string)

    except:
        pass

## =================================================================================== 

def exportPath(opt, trackname):
    """
    This exports the list of segments into a shapefile, a subset of the loaded segment file, including all attributes
    """
    start_time = time.time()
    opt=getUniqueList(opt)
    qr =  '"OBJECTID" IN ' +str(tuple(opt))
    outname = (os.path.splitext(os.path.basename(trackname))[0][:9])+'_pth'
    arcpy.SelectLayerByAttribute_management('segments_lyr',"NEW_SELECTION", qr)
    try:
        if arcpy.Exists(outname):
            arcpy.Delete_management(outname)
        arcpy.FeatureClassToFeatureClass_conversion('segments_lyr', arcpy.env.workspace, outname)
        print("--- export: %s seconds ---" % (time.time() - start_time))
    except Exception:
        e = sys.exc_info()[1]
        print(e.args[0])

        # If using this code within a script tool, AddError can be used to return messages
        #   back to a script tool.  If not, AddError will have no effect.
        arcpy.AddError(e.args[0])
        arcpy.AddError(arcpy.env.workspace)
        arcpy.AddError(outname)
        #raise arcpy.ExecuteError
    except arcpy.ExecuteError:
        arcpy.AddError(arcpy.GetMessages(2))

    # Return any other type of error
    except:
        # By default any other errors will be caught here
        #
        e = sys.exc_info()[1]
        print(e.args[0])
        arcpy.AddError(e.args[0])
        arcpy.AddError(arcpy.env.workspace)
        arcpy.AddError(outname) 

def AddMsgAndPrint(msg, severity=0):
    # prints message to screen if run as a python script
    # Adds tool message to the geoprocessor
    #
    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        print msg

        #for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
        if severity == 0:
            arcpy.AddMessage(msg)

        elif severity == 1:
            arcpy.AddWarning(msg)

        elif severity == 2:
            arcpy.AddError(msg)

    except:
        pass

## =================================================================================== 

def AddMsgAndPrint(msg, severity=0):
    # prints message to screen if run as a python script
    # Adds tool message to the geoprocessor
    #
    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        print msg

        #for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
        if severity == 0:
            arcpy.AddMessage(msg)

        elif severity == 1:
            arcpy.AddWarning(msg)

        elif severity == 2:
            arcpy.AddError("\n" + msg)

    except:
        pass

## =================================================================================== 

def AddMsgAndPrint(msg, severity=0):
    # prints message to screen if run as a python script
    # Adds tool message to the geoprocessor
    #
    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        print msg

        #for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
        if severity == 0:
            arcpy.AddMessage(msg)

        elif severity == 1:
            arcpy.AddWarning(msg)

        elif severity == 2:
            arcpy.AddError("\n" + msg)

    except:
        pass

## =================================================================================== 

def import_AGOLservice(service_name, username="", password="", ags_connection_file="", token="", referer=""):
    '''Imports the AGOL service toolbox based on the specified credentials and returns the toolbox object'''

    #Construct the connection string to import the service toolbox
    if username and password:
        tbx = "http://logistics.arcgis.com/arcgis/services;{0};{1};{2}".format(service_name, username, password)
    elif ags_connection_file:
        tbx = "{0};{1}".format(ags_connection_file, service_name)
    elif token and referer:
        tbx = "http://logistics.arcgis.com/arcgis/services;{0};token={1};{2}".format(service_name, token, referer)
    else:
        arcpy.AddError("No valid option specified to connect to the {0} service".format(service_name))
        raise CustomError

    #Import the service toolbox
    tbx_alias = "agol"
    arcpy.ImportToolbox(tbx, tbx_alias)

    return getattr(arcpy, tbx_alias) 

def CheckArcVersion(min_version_pro=None, min_version_10x=None):
    DetermineArcVersion()
    # Lists must stay in product release order
    # They do not need to have new product numbers added unless a tool requires a higher version
    versions_pro = ["1.0", "1.1", "1.1.1", "1.2"]
    versions_10x = ["10.1", "10.2", "10.2.1", "10.2.2", "10.3", "10.3.1", "10.4"]

    def check_version(min_version, all_versions):
        if min_version not in all_versions:
            arcpy.AddError("Invalid minimum software version number: %s" % str(min_version))
            raise CustomError
        version_idx = all_versions.index(min_version)
        if ArcVersion in all_versions[:version_idx]:
            # Fail out if the current software version is in the list somewhere earlier than the minimum version
            arcpy.AddError("The BetterBusBuffers toolbox does not work in versions of %s prior to %s.  \
You have version %s.  Please check the user's guide for more information on software version compatibility." % (ProductName, min_version, ArcVersion))
            raise CustomError

    if ProductName == "ArcGISPro" and min_version_pro:
        check_version(min_version_pro, versions_pro)
    else:
        if min_version_10x:
            check_version(min_version_10x, versions_10x) 

def AddMsgAndPrint(msg, severity=0):
    # prints message to screen if run as a python script
    # Adds tool message to the geoprocessor
    #
    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:

        #print(msg)
        #for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
        if severity == 0:
            arcpy.AddMessage(msg)

        elif severity == 1:
            arcpy.AddWarning(msg)

        elif severity == 2:
            arcpy.AddError("\n" + msg)

    except:
        pass

## =================================================================================== 

def AddMsgAndPrint(msg, severity=0):
    """prints messages to screen if the script is executed as
       a standalone script.  Otherwise, Adds tool message to the
       window geoprocessor.  Messages are color coded by severity."""

    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        print msg

        #for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
        if severity == 0:
            arcpy.AddMessage(msg)

        elif severity == 1:
            arcpy.AddWarning(msg)

        elif severity == 2:
            arcpy.AddError("\n" + msg)

    except:
        pass

## ================================================================================================================ 

def CountTripsOnLines(day, start_sec, end_sec, DepOrArr, Specific=False):
    '''Given a time window, return a dictionary of {line_key: [[trip_id, start_time, end_time]]}'''

    triplist, triplist_yest, triplist_tom = GetTripLists(day, start_sec, end_sec, DepOrArr, Specific)

    try:
        frequencies_dict = MakeFrequenciesDict()

        # Get the stop_times that occur during this time window
        linetimedict = GetLineTimesInTimeWindow(start_sec, end_sec, DepOrArr, triplist, "today", frequencies_dict)
        linetimedict_yest = GetLineTimesInTimeWindow(start_sec, end_sec, DepOrArr, triplist_yest, "yesterday", frequencies_dict)
        linetimedict_tom = GetLineTimesInTimeWindow(start_sec, end_sec, DepOrArr, triplist_tom, "tomorrow", frequencies_dict)

        # Combine the three dictionaries into one master
        for line in linetimedict_yest:
            linetimedict[line] = linetimedict.setdefault(line, []) + linetimedict_yest[line]
        for line in linetimedict_tom:
            linetimedict[line] = linetimedict.setdefault(line, []) + linetimedict_tom[line]

    except:
        arcpy.AddError("Error creating dictionary of lines and trips in time window.")
        raise CustomError

    return linetimedict 

def PrintMsg(msg, severity=0):
    # Adds tool message to the geoprocessor
    #
    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
            if severity == 0:
                arcpy.AddMessage(string)

            elif severity == 1:
                arcpy.AddWarning(string)

            elif severity == 2:
                arcpy.AddError(" \n" + string)

    except:
        pass

## =================================================================================== 

def PrintMsg(msg, severity=0):
    # prints message to screen if run as a python script
    # Adds tool message to the geoprocessor
    #
    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
            if severity == 0:
                arcpy.AddMessage(string)

            elif severity == 1:
                arcpy.AddWarning(string)

            elif severity == 2:
                arcpy.AddMessage("    ")
                arcpy.AddError(string)

    except:
        pass

## =================================================================================== 

def PrintMsg(msg, severity=0):
    # Adds tool message to the geoprocessor
    #
    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
            if severity == 0:
                arcpy.AddMessage(string)

            elif severity == 1:
                arcpy.AddWarning(string)

            elif severity == 2:
                arcpy.AddMessage("    ")
                arcpy.AddError(string)

    except:
        pass

## =================================================================================== 

def PrintMsg(msg, severity=0):
    # Adds tool message to the geoprocessor
    #
    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
            if severity == 0:
                arcpy.AddMessage(string)

            elif severity == 1:
                arcpy.AddWarning(string)

            elif severity == 2:
                arcpy.AddMessage("    ")
                arcpy.AddError(string)

    except:
        pass

## =================================================================================== 

def PrintMsg(msg, severity=0):
    # Adds tool message to the geoprocessor
    #
    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
            if severity == 0:
                arcpy.AddMessage(string)

            elif severity == 1:
                arcpy.AddWarning(string)

            elif severity == 2:
                arcpy.AddMessage("    ")
                arcpy.AddError(string)

    except:
        pass

## =================================================================================== 

def PrintMsg(msg, severity=0):
    # Adds tool message to the geoprocessor
    #
    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
            if severity == 0:
                arcpy.AddMessage(string)

            elif severity == 1:
                arcpy.AddWarning(string)

            elif severity == 2:
                arcpy.AddError(" \n" + string)

    except:
        pass

## =================================================================================== 

def PrintMsg(msg, severity=0):
    # Adds tool message to the geoprocessor
    #
    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
            if severity == 0:
                arcpy.AddMessage(string)

            elif severity == 1:
                arcpy.AddWarning(string)

            elif severity == 2:
                arcpy.AddMessage("    ")
                arcpy.AddError(string)

    except:
        pass

## =================================================================================== 

def PrintMsg(msg, severity=0):
    # prints message to screen if run as a python script
    # Adds tool message to the geoprocessor
    #
    # Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
            if severity == 0:
                arcpy.AddMessage(string)

            elif severity == 1:
                arcpy.AddWarning(string)

            elif severity == 2:
                arcpy.AddMessage("    ")
                arcpy.AddError(string)

    except:
        pass

## =================================================================================== 

def PrintMsg(msg, severity=0):
    # Adds tool message to the geoprocessor
    #
    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
            if severity == 0:
                arcpy.AddMessage(string)

            elif severity == 1:
                arcpy.AddWarning(string)

            elif severity == 2:
                arcpy.AddError(" \n" + string)

    except:
        pass

## =================================================================================== 

def featuresToGPX(inputFC, outGPX, zerodate, pretty):
    ''' This is called by the __main__ if run from a tool or at the command line
    '''

    descInput = arcpy.Describe(inputFC)
    if descInput.spatialReference.factoryCode != 4326:
        arcpy.AddWarning("Input data is not projected in WGS84,"
                         " features were reprojected on the fly to create the GPX.")

    generatePointsFromFeatures(inputFC , descInput, zerodate)

    # Write the output GPX file
    try:
        if pretty:
            gpxFile = open(outGPX, "w")
            gpxFile.write(prettify(gpx))
        else:
            gpxFile = open(outGPX, "wb")
            ET.ElementTree(gpx).write(gpxFile, encoding="UTF-8", xml_declaration=True)
    except TypeError as e:
        arcpy.AddError("Error serializing GPX into the file.")
    finally:
        gpxFile.close() 

def PrintMsg(msg, severity=0):
    # Adds tool message to the geoprocessor
    #
    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
            if severity == 0:
                arcpy.AddMessage(string)

            elif severity == 1:
                arcpy.AddWarning(string)

            elif severity == 2:
                arcpy.AddMessage("    ")
                arcpy.AddError(string)

    except:
        pass

## =================================================================================== 

def PrintMsg(msg, severity=0):
    # Adds tool message to the geoprocessor
    #
    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
            if severity == 0:
                arcpy.AddMessage(string)

            elif severity == 1:
                arcpy.AddWarning(string)

            elif severity == 2:
                arcpy.AddMessage("    ")
                arcpy.AddError(string)

    except:
        pass

## =================================================================================== 

def PrintMsg(msg, severity=0):
    # Adds tool message to the geoprocessor
    #
    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
            if severity == 0:
                arcpy.AddMessage(string)

            elif severity == 1:
                arcpy.AddWarning(string)

            elif severity == 2:
                arcpy.AddError(" \n" + string)

    except:
        pass

## =================================================================================== 

def PrintMsg(msg, severity=0):
    # Adds tool message to the geoprocessor
    #
    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
            if severity == 0:
                arcpy.AddMessage(string)

            elif severity == 1:
                arcpy.AddWarning(string)

            elif severity == 2:
                arcpy.AddMessage("    ")
                arcpy.AddError(string)

    except:
        pass

## =================================================================================== 

def output_msg(msg, severity=0):
    """ Adds a Message (in case this is run as a tool)
        and also prints the message to the screen (standard output)
        :param msg: text to output
        :param severity: 0 = none, 1 = warning, 2 = error
    """
    print msg
    # Split the message on \n first, so that if it's multiple lines,
    #  a GPMessage will be added for each line
    try:
        for string in msg.split('\n'):
            # Add appropriate geoprocessing message
            if severity == 0:
                arcpy.AddMessage(string)
            elif severity == 1:
                arcpy.AddWarning(string)
            elif severity == 2:
                arcpy.AddError(string)
    except:
        pass 

def PrintMsg(msg, severity=0):
    # prints message to screen if run as a python script
    # Adds tool message to the geoprocessor
    #
    # Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
            if severity == 0:
                arcpy.AddMessage(string)

            elif severity == 1:
                arcpy.AddWarning(string)

            elif severity == 2:
                arcpy.AddMessage("    ")
                arcpy.AddError(string)

    except:
        pass

## =================================================================================== 

def release_info():
    """Get latest release version and download URL from
       the GitHub API.

    Returns:
        (download_url, tag_name) tuple.
    """
    download_url = None
    tag = None
    json_r = parse_json_url(latest_url)
    if json_r is not None and 'assets' in json_r:
        assets = json_r['assets'][0]
        if 'browser_download_url' in assets and \
                'tag_name' in json_r:
            download_url = assets['browser_download_url']
            tag = json_r['tag_name']
        if not download_url or not tag:
            arcpy.AddError("Invalid GitHub API response for URL '{}'".format(
                latest_url))

    return (download_url, tag) 

def PrintMsg(msg, severity=0):
    # prints message to screen if run as a python script
    # Adds tool message to the geoprocessor
    #
    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
            if severity == 0:
                arcpy.AddMessage(string)

            elif severity == 1:
                arcpy.AddWarning(string)

            elif severity == 2:
                arcpy.AddMessage("    ")
                arcpy.AddError(string)
                #arcpy.AddMessage("    ")

    except:
        pass

## =================================================================================== 

def PrintMsg(msg, severity=0):
    # Adds tool message to the geoprocessor
    #
    #Split the message on \n first, so that if it's multiple lines, a GPMessage will be added for each line
    try:
        for string in msg.split('\n'):
            #Add a geoprocessing message (in case this is run as a tool)
            if severity == 0:
                arcpy.AddMessage(string)

            elif severity == 1:
                arcpy.AddWarning(string)

            elif severity == 2:
                arcpy.AddMessage("    ")
                arcpy.AddError(string)

    except:
        pass

## =================================================================================== 

def update_service_definition(args_parser):
    try:
        gis = GIS(args_parser.url,args_parser.username, args_parser.password)
        featureLayerItem = gis.content.get(args_parser.itemId)

        featureLayerCollection = FeatureLayerCollection.fromitem(featureLayerItem)
        layers = featureLayerCollection.manager.layers
        tables = featureLayerCollection.manager.tables

        arcpy.AddMessage("Updating Service Definition..")        

        for layer in layers:
            layer_index = layers.index(layer)
            update_template(featureLayerCollection,layer,layer_index,False)

        for table in tables:
            table_index = tables.index(table)
            update_template(featureLayerCollection,table,table_index,True)

                
        arcpy.AddMessage("Updated Service Definition..")

    except Exception as e:
        arcpy.AddError(e)