Pop up Octave kernel windows in Jupyter

[mserouar]

HI !

Each time I try to import Oct2Py on a Jupyter Lab/Notebook a Pop up Octave kernel windows appears and then nothing happens until I interrupt Jupyter cells (I'm on Linux). If not I have a TIMEOUT: Timeout exceeded. error

Is there a known way for this issue ?

Thanks a lot !

Octave kernel v0.34.0
Metakernel v0.28.2
Python v3.7.4 (default, Aug 13 2019, 20:35:49) 
[GCC 7.3.0]

from oct2py import Oct2Py`
oc = Oct2Py()`

---------------------------------------------------------------------------
TIMEOUT                                   Traceback (most recent call last)
~/anaconda3/lib/python3.7/site-packages/pexpect/expect.py in expect_loop(self, timeout)
    110                 # Still have time left, so read more data
--> 111                 incoming = spawn.read_nonblocking(spawn.maxread, timeout)
    112                 if self.spawn.delayafterread is not None:

~/anaconda3/lib/python3.7/site-packages/pexpect/pty_spawn.py in read_nonblocking(self, size, timeout)
    508         else:
--> 509             raise TIMEOUT('Timeout exceeded.')
    510 

TIMEOUT: Timeout exceeded.

During handling of the above exception, another exception occurred:

TIMEOUT                                   Traceback (most recent call last)
<ipython-input-2-a1167d5c5b6e> in <module>
----> 1 from oct2py import Oct2Py

~/anaconda3/lib/python3.7/site-packages/oct2py/__init__.py in <module>
     36 
     37 try:
---> 38     octave = Oct2Py()
     39 except Oct2PyError as e:
     40     print(e)

~/anaconda3/lib/python3.7/site-packages/oct2py/core.py in __init__(self, logger, timeout, oned_as, temp_dir, convert_to_float, backend)
     78         self._user_classes = dict()
     79         self._function_ptrs = dict()
---> 80         self.restart()
     81 
     82     @property

~/anaconda3/lib/python3.7/site-packages/oct2py/core.py in restart(self)
    525 
    526         self._engine = OctaveEngine(stdin_handler=self._handle_stdin,
--> 527                                     logger=self.logger)
    528 
    529         # Add local Octave scripts.

~/anaconda3/lib/python3.7/site-packages/octave_kernel/kernel.py in __init__(self, error_handler, stream_handler, line_handler, stdin_handler, plot_settings, inline_toolkit, defer_startup, cli_options, logger)
    174         self.cli_options = cli_options
    175         self.inline_toolkit = inline_toolkit
--> 176         self.repl = self._create_repl()
    177         self.error_handler = error_handler
    178         self.stream_handler = stream_handler

~/anaconda3/lib/python3.7/site-packages/octave_kernel/kernel.py in _create_repl(self)
    397         repl = REPLWrapper(cmd, orig_prompt, change_prompt,
    398                            stdin_prompt_regex=STDIN_PROMPT_REGEX,
--> 399                            force_prompt_on_continuation=True)
    400         if os.name == 'nt':
    401             repl.child.crlf = '\n'

~/anaconda3/lib/python3.7/site-packages/metakernel/replwrap.py in __init__(self, cmd_or_spawn, prompt_regex, prompt_change_cmd, new_prompt_regex, continuation_prompt_regex, stdin_prompt_regex, extra_init_cmd, prompt_emit_cmd, force_prompt_on_continuation, echo)
     88             self.set_prompt(prompt_regex,
     89                             prompt_change_cmd.format(new_prompt_regex,
---> 90                                                      continuation_prompt_regex))
     91             self.prompt_regex = new_prompt_regex
     92         self.continuation_prompt_regex = continuation_prompt_regex

~/anaconda3/lib/python3.7/site-packages/metakernel/replwrap.py in set_prompt(self, prompt_regex, prompt_change_cmd)
    110 
    111     def set_prompt(self, prompt_regex, prompt_change_cmd):
--> 112         self.child.expect(prompt_regex)
    113         self.sendline(prompt_change_cmd)
    114         self.prompt_change_cmd = prompt_change_cmd

~/anaconda3/lib/python3.7/site-packages/pexpect/spawnbase.py in expect(self, pattern, timeout, searchwindowsize, async_, **kw)
    339         compiled_pattern_list = self.compile_pattern_list(pattern)
    340         return self.expect_list(compiled_pattern_list,
--> 341                 timeout, searchwindowsize, async_)
    342 
    343     def expect_list(self, pattern_list, timeout=-1, searchwindowsize=-1,

~/anaconda3/lib/python3.7/site-packages/pexpect/spawnbase.py in expect_list(self, pattern_list, timeout, searchwindowsize, async_, **kw)
    367             return expect_async(exp, timeout)
    368         else:
--> 369             return exp.expect_loop(timeout)
    370 
    371     def expect_exact(self, pattern_list, timeout=-1, searchwindowsize=-1,

~/anaconda3/lib/python3.7/site-packages/pexpect/expect.py in expect_loop(self, timeout)
    117             return self.eof(e)
    118         except TIMEOUT as e:
--> 119             return self.timeout(e)
    120         except:
    121             self.errored()

~/anaconda3/lib/python3.7/site-packages/pexpect/expect.py in timeout(self, err)
     80             if err is not None:
     81                 msg = str(err) + '\n' + msg
---> 82             raise TIMEOUT(msg)
     83 
     84     def errored(self):

TIMEOUT: Timeout exceeded.
<pexpect.pty_spawn.spawn object at 0x7f9c3840ea50>
command: /usr/bin/octave
args: [b'/usr/bin/octave', b'--interactive', b'--quiet', b'--no-init-file']
buffer (last 100 chars): ''

after: <class 'pexpect.exceptions.TIMEOUT'>
match: None
match_index: None
exitstatus: None
flag_eof: False
pid: 23937
child_fd: 47
closed: False
timeout: 30
delimiter: <class 'pexpect.exceptions.EOF'>
logfile: None
logfile_read: None
logfile_send: None
maxread: 2000
ignorecase: False
searchwindowsize: None
delaybeforesend: 0.05
delayafterclose: 0.1
delayafterterminate: 0.1
searcher: searcher_re:
    0: re.compile('octave.*>')

[mserouar]

import os
os.environ['OCTAVE_EXECUTABLE'] = '/usr/bin/octave-cli'