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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 _extract_item(self, item):
 """ utility function to extract an "item", meaning a extension number,name plus version. """

        ver = 0
        if isinstance(item, tuple):
            ver_sent = True
            nitem = len(item)
            if nitem == 1:
                ext = item[0]
            elif nitem == 2:
                ext, ver = item
        else:
            ver_sent = False
            ext = item
        return ext, ver, ver_sent