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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_filesize(self, f):
 """Return the filesize of the PDF as a float """

        try:
            filesize = float(f.get_size())
            return float("%.2f" % (filesize / 1024))
        except (POSKeyError, TypeError, AttributeError):
            return 0.0