import sys
import traceback
import arcpy
from arcpy import env

## ARGUMENTS
# argv[1] = input table/feature class path
# argv[2] = input old field name
# argv[3] = input new field name

path = sys.argv[1]
oldFieldName = sys.argv[2]
newFieldName = sys.argv[3]

env.overwriteOutput = True

fields = arcpy.ListFields(path)
for field in fields:
    if field.aliasName == oldFieldName:
        if not oldFieldName == newFieldName:
            fieldType = field.type
            # Add new field
            arcpy.AddField_management(path, newFieldName, fieldType)
            #Calculates the new field based on old field values
            arcpy.CalculateField_management(path, newFieldName, "!"+oldFieldName+"!", "PYTHON", "")
            # Delete the old field (if necessary)
            arcpy.DeleteField_management(path, oldFieldName)

if fieldInfo.getFieldName(index)=="status":

            # Process: Add Field
            arcpy.AddField_management(layer, "stat", "TEXT", "", "", "50", "",        "NULLABLE", "NON_REQUIRED", "")

            # Process: Calculate Field
            arcpy.CalculateField_management(layer, "stat", "!status!", "PYTHON_9.3", "")

            # Process: Delete Field
            arcpy.DeleteField_management(layer, "status")