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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_all_parts(self, max_parts=None, part_number_marker=None):
 """ Return the uploaded parts of this MultiPart Upload. This is a lower-level method that requires you to manually page through results. To simplify this process, you can just use the object itself as an iterator and it will automatically handle all of the paging with S3. """

        self._parts = []
        query_args = 'uploadId=%s' % self.id
        if max_parts:
            query_args += '&max-parts=%d' % max_parts
        if part_number_marker:
            query_args += '&part-number-marker=%s' % part_number_marker
        response = self.bucket.connection.make_request('GET', self.bucket.name,
                                                       self.key_name,
                                                       query_args=query_args)
        body = response.read()
        if response.status == 200:
            h = handler.XmlHandler(self, self)
            xml.sax.parseString(body, h)
            return self._parts