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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 NewFd(self, fd, URL, encoding, options):
 """Setup an xmltextReader to parse an XML from a file descriptor. NOTE that the file descriptor will not be closed when the reader is closed or reset. The parsing flags @options are a combination of xmlParserOption. This reuses the existing @reader xmlTextReader. """

        ret = libxml2mod.xmlReaderNewFd(self._o, fd, URL, encoding, options)
        return ret