OS X Sierra: Can't make the magic commands work

[gacek91]

Hey there,

I'm pretty much out of ideas how to fix my issue.

This code works like a charm, no problems whatsoever.

from pymatbridge import Matlab
mlab = Matlab(executable='/Applications/MATLAB_R2018a.app/bin/matlab')
mlab.start()

However, I would really like to be able to use magic codes. Both codes below give me this error: ValueError: MATLAB failed to start

%load_ext pymatbridge

import pymatbridge as pymat
ip = get_ipython()
pymat.load_ipython_extension(ip)

I even tried changing MATLAB_BIN=/Applications/MATLAB_R2018a.app/bin/ in .../messenger/mexmaci/local.cfg, didn't help either.

Last but not least - I tried changing dir to .../messenger/ and running python3.6 make.py matlab. Got an error:

macbook-air:messenger Gacek$ python3.6 make.py matlab
Building messenger.mexmaci64...
/Applications/MATLAB_R2018a.app/bin/mex -O -L. -I. -lzmq ./src/messenger.c
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pymatbridge/messenger/./src/messenger.c not found; check that you are in the correct current folder, and check the spelling of '/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pymatbridge/messenger/./src/messenger.c'.
Traceback (most recent call last):
  File "make.py", line 285, in <module>
    build_matlab(static=args.static)
  File "make.py", line 270, in build_matlab
    do_build(make_cmd, 'messenger.%s' % extension)
  File "make.py", line 178, in do_build
    subprocess.check_output(shlex.split(make_cmd), shell=use_shell)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/subprocess.py", line 336, in check_output
    **kwargs).stdout
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/subprocess.py", line 418, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['/Applications/MATLAB_R2018a.app/bin/mex', '-O', '-L.', '-I.', '-lzmq', './src/messenger.c']' returned non-zero exit status 255.

Would be grateful for any ideas!

Regards,

Matt

[arokem]

Maybe add an alias to your shell configuration?

alias matlab = "/Applications/MATLAB_R2018a.app/bin/matlab"

[gacek91]

No luck either. Is there any way to combine it all together and custom matlab path (like below) with pymatbridge.load_ipython_extension()?

from pymatbridge import Matlab
mlab = Matlab(executable='/Applications/MATLAB_R2018a.app/bin/matlab')

[arokem]

I believe this should work:

pymatbridge.load_ipython_extension(executable='/Applications/MATLAB_R2018a.app/bin/matlab')

Doesn't it?

[arokem]

Sorry, I mean:

pymatbridge.load_ipython_extension(ip, executable='/Applications/MATLAB_R2018a.app/bin/matlab')

[gacek91]

I tried doing that as well before, doesn't work because there's no such keyword argument:

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-199-b92eb29f728c> in <module>()
      1 import pymatbridge as pymat
      2 ip = get_ipython()
----> 3 pymat.load_ipython_extension(ip, executable='/Applications/MATLAB_R2018a.app/bin/matlab')

/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pymatbridge/matlab_magic.py in load_ipython_extension(ip, **kwargs)
    208     global _loaded
    209     if not _loaded:
--> 210         ip.register_magics(MatlabMagics(ip, **kwargs))
    211         _loaded = True
    212 

TypeError: __init__() got an unexpected keyword argument 'executable'

[arokem]

Oh - I think that's because it doesn't follow the same API.

https://github.com/arokem/python-matlab-bridge/blob/master/pymatbridge/matlab_magic.py#L53

Could you please try the following?

pymatbridge.load_ipython_extension(ip, matlab='/Applications/MATLAB_R2018a.app/bin/matlab')

[gacek91]

Damn, it works! Cheers!

[arokem]

Happy it worked! We should probably change that API to be consistent.

…

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