[Zope] trying to open a file in database but couldn't

Allen Huang swapp0 at yahoo.com
Sun Feb 26 00:55:24 EST 2006

I'm trying to open a file that is in database but I got this error message instead
  coercing to Unicode: need string or buffer, instance found
  I don't quite understand why. My code looks like this
  def imageSetup(self, dataID, REQUEST):
    from StringIO import StringIO
      # Get the original image and data in memory and open the file
    imageData=getattr(self, dataID)
      tfw = open(imageDataFile, "r")
  I upload a text file into ZOPE database and
  the file consist of six lines of float point numbers that I want to use with REQUEST.set
  I call this method using 
  < dtml-call "imageSetup(textFile, REQUEST)" >
  can anyone help me... please...
  did I made a mistake with this code

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