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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 cpu_halt_reasons(self):
 """Retrives the reasons that the CPU was halted. Args: self (JLink):
 the ``JLink`` instance Returns: A list of ``JLInkMOEInfo`` instances specifying the reasons for which the CPU was halted. This list may be empty in the case that the CPU is not halted. Raises: JLinkException: on hardware error. """

        buf_size = self.MAX_NUM_MOES
        buf = (structs.JLinkMOEInfo * buf_size)()
        num_reasons = self._dll.JLINKARM_GetMOEs(buf, buf_size)
        if num_reasons < 0:
            raise errors.JLinkException(num_reasons)

        return list(buf)[:num_reasons]