Conflict with opencv

[WiserOrb]

Hi, I've encountered a breaking bug when trying to use oct2py and opencv (cv2)
It crashes if:

1. import cv2 before oct2py
2. import oct2py, import cv2, calling Oct2Py()

How it breaks

import cv2

import oct2py #here it breaks

import oct2py
import cv2

oc = oct2py.Oct2Py() #here it breaks

import oct2py
oc = oct2py.Oct2Py() #create before importing cv2 as a workaround
#this instance works as expected

import cv2
oc = oct2py.Oct2Py() #here it breaks

Python version: 3.10.4
oct2py: 5.5.1
octave: 6.4.0
opencv: 4.5.5.64

[blink1073]

What operating system? It seems to be working for me on macOS 12.3.1 with packages installed from conda-forge, except for Octave, which I got from homebrew.

Python version: 3.10.4
opencv: 4.5.5
octave: 6.4.0

In [1]: import cv2
In [2]: import oct2py
In [3]: oc = oct2py.Oct2Py()
In [4]: oc.ones()
Out[4]: 1.0

[WiserOrb]

Ubuntu 22.04

[blink1073]

Are you getting an error of the form ValueError: numpy.ndarray size changed, may indicate binary incompatibility. Expected 96 from C header, got 80 from PyObject?

[WiserOrb]

No, I get an EOF exception

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/diego/.local/lib/python3.10/site-packages/oct2py/__init__.py", line 38, in <module>
    octave = Oct2Py()
  File "/home/diego/.local/lib/python3.10/site-packages/oct2py/core.py", line 83, in __init__
    self.restart()
  File "/home/diego/.local/lib/python3.10/site-packages/oct2py/core.py", line 533, in restart
    self._engine = OctaveEngine(stdin_handler=self._handle_stdin,
  File "/home/diego/.local/lib/python3.10/site-packages/octave_kernel/kernel.py", line 176, in __init__
    self.repl = self._create_repl()
  File "/home/diego/.local/lib/python3.10/site-packages/octave_kernel/kernel.py", line 402, in _create_repl
    repl = REPLWrapper(cmd, orig_prompt, change_prompt,
  File "/home/diego/.local/lib/python3.10/site-packages/metakernel/replwrap.py", line 88, in __init__
    self.set_prompt(prompt_regex,
  File "/home/diego/.local/lib/python3.10/site-packages/metakernel/replwrap.py", line 112, in set_prompt
    self.child.expect(prompt_regex)
  File "/usr/lib/python3/dist-packages/pexpect/spawnbase.py", line 343, in expect
    return self.expect_list(compiled_pattern_list,
  File "/usr/lib/python3/dist-packages/pexpect/spawnbase.py", line 372, in expect_list
    return exp.expect_loop(timeout)
  File "/usr/lib/python3/dist-packages/pexpect/expect.py", line 179, in expect_loop
    return self.eof(e)
  File "/usr/lib/python3/dist-packages/pexpect/expect.py", line 122, in eof
    raise exc
pexpect.exceptions.EOF: End Of File (EOF). Exception style platform.
<pexpect.pty_spawn.spawn object at 0x7f8be10fc820>
command: /usr/bin/octave
args: [b'/usr/bin/octave', b'--interactive', b'--quiet', b'--no-init-file']
buffer (last 100 chars): ''
before (last 100 chars): 'em.\r\n\r\nAvailable platform plugins are: xcb, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc.\r\n\r\n'
after: <class 'pexpect.exceptions.EOF'>
match: None
match_index: None
exitstatus: None
flag_eof: True
pid: 94481
child_fd: 6
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.*>')

[blink1073]

Ah, so the Octave process is crashing. I'm not quite sure what else to try.