#######################
import arcpy
from arcpy import env
import os

import sys

fc= arcpy.GetParameterAsText(0)
filename= arcpy.GetParameterAsText(1)

rows = arcpy.UpdateCursor(fc)

#########################################
##
for row in rows:
    shape=row.shape
    parea=shape.area
    row.setValue(filename,parea)
    rows.updateRow(row)

del row
del rows

import arcpy
from arcpy import env
import os

import sys

fc= arcpy.GetParameterAsText(0)
filename= arcpy.GetParameterAsText(1)
fields = (filename,‘[email protected]‘)

rows = arcpy.da.UpdateCursor(fc,fields)

#########################################
##
for row in rows:
    parea=row[1]
    #parea=shape.area
    row[0]=parea
    rows.updateRow(row)

del row
del rows