Allen Huang wrote:

Hi

I want to use external methods to read a text file and image in database and modify the REQUEST

my code looks like this varible ----------------------- def imageSetup(self, imageID, dataID, REQUEST): import PIL.Image from StringIO import StringIO

# Get the original image and data in memory. image=getattr(self, imageID) imageData=getattr(self, dataID) imageFile=StringIO(str(image.data)) imageDataFile=StringIO(str(imageData.data)) # open image and data file im = PIL.Image.open(imageFile) tfw = open(imageDataFile, "r")

# assign data coordinate and image size to variables imX,imY = im.size() rX=float(tfw.readline()) tfw.readline() tfw.readline() rY=float(tfw.readline()) mnX=float(tfw.readline()) mnY=float(tfw.readline()) mxX=mnX+imX*rX mxY=mnY+imY*rY

# assign variables to REQUEST REQUEST.set('resX', rX) REQUEST.set('resY', rY) REQUEST.set('minX', mnX) REQUEST.set('minY', mnY) REQUEST.set('maxX', mxX) REQUEST.set('maxY', mxY) REQUEST.set('pixelX', imX) REQUEST.set('pixelY', imY) -------------------------------------- but all I get is this

zope coercing to Unicode: need string or buffer, instance found

and the REQUEST variable is unchanged

I'm still new to external scripting so I don't know what the problem is (and I think there is a lot of it here)

so, could someone help me out??

It's likely that you're passing an object to a method that wants a string (probably an id). Without a traceback, it's impossible to say more. Are you sure that the things you're passing in as ids are really ids and not the objects themselves? --jcc -- Building Websites with Plone http://plonebook.packtpub.com/