psyco抱怨不支持的操作码54,它是什么?

psyco日志输出如下所示:

21:08:47.56  Logging started, 10/29/09                  %%%%%%%%%%%%%%%%%%%%
21:08:47.56  unsupported opcode 54 at create_l0:124                      % %
21:08:47.56  unsupported opcode 54 at create_lx:228                      % %

有问题的台词

class File:
    def __init__(self, path, header):
        self.path = path
        self.header = header
        self.file = path + '/' + header.to_filename()
        self.pfile = None

    def add_entry(self, entry):                        # line 124
        self.pfile.write(entry.to_binary())

    def open(self):
        self.pfile = open(self.file, 'wb')
        self.pfile.write(self.header.to_binary())

    def close(self):
        self.pfile.close()

    def write(self, data):
        self.pfile.write(data)

下一个:

nat_file = File(target + '/' + name, nat_header)
nat_file.open()
# add first value
nat_file.add_entry(DataBlock(t, q, 0.0, 1, v))
# add all others
while True:
    try:
        t, v, q = f.next()
    except StopIteration:
        break
    nat_file.add_entry(DataBlock(t, q, 0.0, 1, v))
nat_file.close()                                     # line 228

我有点不知所措。有什么想法吗?