Extracted files form zip corrupted

[Astley Le Jasper]

I want to batch extract files from a directory of zips. The thing is
that the files are excel spreadsheets. I don't want to read them in
python, just dump them as extracted files in another directory.
However, when I do a test the excel file becomes corrupted. Any clues?

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import zipfile

zf = zipfile.ZipFile('C:\Temp\mytest.zip')
filename = 'spreadsheet.xls'

data = zf.read(filename)

uz_file = 'C:\Temp\' + filename
f = open(uz_file, "w")
f.write(data)
f.close()

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