[Biopython] [Entrez] use the handle twice

[Michiel de Hoon]

You could use StringIO and save the output from handle.read in memory. Then you can use the data in StringIO twice; once to parse the XML, and once to save it to disk.The easiest solution of course is to simply parse the XML file you have saved. I don't see why that doesn't count as a solution.-Michiel
 

    On Saturday, December 19, 2015 7:09 PM, "c.buhtz at posteo.jp" <c.buhtz at posteo.jp> wrote:
 

 I want to use the handle returned by Entrez.efetch() twice.

First time, write the xml to a file

    f.write(handle._handle.read())

But I want to know how much records are in there.

    records = Entrez.read(handle)
    print(records['Count'])

This doesn't work here because the handle is "empty" after the first
read()-call.

Open an read the xml-file would be a resource wasting workaround and not
a solution.
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