linux - Jupyter Matlab 内核 json 错误

Question

老实说，我不确定问题的根源是什么(Jupyter notebooks、MATLAB、matlab_kernel 还是 pymatbridge)所以我想我只是把问题和所有标签一起发布在这里。

我正在从服务器 (Ubuntu 14.04) 远程运行 MATLAB 内核的 Jupyter 笔记本。为了设置 MATLAB 内核，我按照 these 安装了 pymatbridge 和 matlab_kernel。指示。似乎 MATLAB 内核本身运行得很好(测试了一些简单的 MATLAB 命令，输出和错误消息按预期打印)，当我不在 Jupyter 笔记本中调用它时，MATLAB 本身工作正常，但当我尝试运行另一个notebook中的MATLAB函数via

addpath('/path/to/function')
y = function(x)

我收到以下错误:

[MetaKernelApp] ERROR | Exception in message handler:
Traceback (most recent call last):
  File "/usr/local/lib/python3.4/dist-packages/ipykernel/kernelbase.py", line 228, in dispatch_shell
    handler(stream, idents, msg)
  File "/usr/local/lib/python3.4/dist-packages/ipykernel/kernelbase.py", line 391, in execute_request
    user_expressions, allow_stdin)
  File "/usr/local/lib/python3.4/dist-packages/metakernel/_metakernel.py", line 358, in do_execute
    retval = self.do_execute_direct(code)
  File "/usr/local/lib/python3.4/dist-packages/matlab_kernel/kernel.py", line 127, in do_execute_direct
    resp = self._matlab.run_code(code.strip())
  File "/usr/local/lib/python3.4/dist-packages/matlab_kernel/kernel.py", line 52, in run_code
    return self._engine.run_code(code)
  File "/usr/local/lib/python3.4/dist-packages/pymatbridge/pymatbridge.py", line 319, in run_code
    return self.run_func('evalin', 'base', code, nargout=0)
  File "/usr/local/lib/python3.4/dist-packages/pymatbridge/pymatbridge.py", line 309, in run_func
    nargout=nargout)
  File "/usr/local/lib/python3.4/dist-packages/pymatbridge/pymatbridge.py", line 272, in _json_response
    return json.loads(self._response(**kwargs), object_hook=decode_pymat)
  File "/usr/lib/python3.4/json/__init__.py", line 331, in loads
    return cls(**kw).decode(s)
  File "/usr/lib/python3.4/json/decoder.py", line 343, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python3.4/json/decoder.py", line 361, in raw_decode
    raise ValueError(errmsg("Expecting value", s, err.value)) from None
ValueError: Expecting value: line 1 column 9007 (char 9006)

任何可能导致此错误的想法，以及错误的确切含义？

Answer 1

也许它正在返回 None 因为您的命令有错误？ add path 还是 addpath？

addpath('/path/to/function')