I need to rename a list of feature classes (each one has only one feature) based on attribute data, i face an error says ExecuteError: ERROR 000840: The value is not a Data Element. for last line in this code... please advice

[Mohamed_AbdelhamidHassan]

import arcpy

from arcpy import env

# Set the workspace for ListFeatureClasses

env.workspace = r"C:\Users\mohamed.abdelhamid\Desktop\Python\test\rename_test.gdb"

fcs = arcpy.ListFeatureClasses()

# Get the subdistric name from attribute

for itmes in fcs:

    field1  = "DIS_ARB_NA"

    field2 = "SDIS_ARB_N"

    cursor = arcpy.SearchCursor(itmes)

    for row in cursor:

        disname = row.getValue(field1)

        subname = row.getValue(field2)

        arcpy.Rename_management(in_data=itmes,out_data=disname + "_" + subname,data_type="FeatureClass")

[Mohamed_AbdelhamidHassan]

i face the same error within the last line in the code!!!!!

Traceback (most recent call last):

  File "C:\Python27\ArcGIS10.2\Lib\site-packages\Pythonwin\pywin\framework\scriptutils.py", line 326, in RunScript

    exec codeObject in __main__.__dict__

  File "C:\Users\mohamed.abdelhamid\Desktop\Python\test\renaming_3.py", line 21, in <module>

    arcpy.Rename_management(fc, str(dname + "_" + sname), "FeatureClass")

  File "C:\Program Files\ArcGIS\Desktop10.2\arcpy\arcpy\management.py", line 4048, in Rename

    raise e

ExecuteError: ERROR 999999: Error executing function.

The dataset name is invalid.

Failed to execute (Rename).

>>>

[AhmedEl-Sisi]

One optimization is to use arcpy.ValidateTableName to avoid any invalid feature class name as some characters like dash is not allowed.

import arcpy

from arcpy import env

env.workspace = r"C:\Users\mohamed.abdelhamid\Desktop\Python\test\Egy_SubDistricts_rename.gdb"

fcs = arcpy.ListFeatureClasses()

fields = ["DIS_ARB_NA","SDIS_ARB_N"]

for fc in fcs:

    with arcpy.da.SearchCursor(fc,fields) as cursor:

        for row in cursor:
            fullname= row[0] + row[1]
           
        del row, cursor

    print fullname
    outfc = arcpy.ValidateTableName(fullname,env.workspace)
    arcpy.Rename_management(fc, outfc, "FeatureClass")