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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 copy(self):
 """ Make deep copy of this KeyBundle :return: The copy """

        kb = KeyBundle()
        kb._keys = self._keys[:]

        kb.cache_time = self.cache_time
        kb.verify_ssl = self.verify_ssl
        if self.source:
            kb.source = self.source
            kb.fileformat = self.fileformat
            kb.keytype = self.keytype
            kb.keyusage = self.keyusage
            kb.remote = self.remote

        return kb