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

[Allen Huang]

Hi.. thanks for replying and thanks for the help
   
  I didn't realize that I mis type the code. The code what suppose to be ..
   imageDataFile=StringIO(str(dataID.data))
 tfw = open(imageDataFile, "r")
   
  so, what your saying is that I don't need to open the file that I wanted to read into and extract the data? But how can that be?
  I originally used tried by extracting info from a file on the computer and it works. But I couldn't do the same thing from the web.. I don't get that I did wrong or missing...
   
  How would you write the external method if you were to read a text file that you store in ZOPE database and extract the infromation line by line?


Andreas Jung <lists at andreas-jung.com> wrote:
  

--On 25. Februar 2006 21:55:24 -0800 Allen Huang wrote:


> imageDataFile=StringIO(str(imageData.data))
> tfw = open(imageDataFile, "r")
>

Please consult the StringIO documentation. There is no need to open()
a StringIO instance...also your code makes little sense to me because
str() already returns a string which is usually what you need and want.
Why do you have the need to put the image data into a StringIO instance.
And another point: you should always use cStringIO instead of StringIO
(for performance reasons)...consult the Python Library reference for 
details.
-aj



			
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