NotImplementedError when trying to run cq-editor

Date: 27 November 2020 Version: the master in Conda at the time of writing.

The instructions for installing cadquery and CQ-editor:

Installation Use conda to install: conda install -c cadquery -c conda-forge cq-editor=master

The installation seems to work fine.

But I get an error when I do

and then simply type cq-editor to run it.

The error is as follows:

Traceback (most recent call last):
  File "C:\ProgramData\Anaconda3\lib\site-packages\traitlets\traitlets.py", line 535, in get
    value = obj._trait_values[self.name]
KeyError: 'iopub_socket'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\ProgramData\Anaconda3\lib\site-packages\traitlets\traitlets.py", line 535, in get
    value = obj._trait_values[self.name]
KeyError: 'iopub_thread'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\ProgramData\Anaconda3\Scripts\CQ-editor-script.py", line 10, in <module>
    sys.exit(main())
  File "C:\ProgramData\Anaconda3\lib\site-packages\cq_editor\__main__.py", line 16, in main
    win = MainWindow()
  File "C:\ProgramData\Anaconda3\lib\site-packages\cq_editor\main_window.py", line 38, in __init__
    self.prepare_panes()
  File "C:\ProgramData\Anaconda3\lib\site-packages\cq_editor\main_window.py", line 93, in prepare_panes
    ConsoleWidget(self),
  File "C:\ProgramData\Anaconda3\lib\site-packages\cq_editor\widgets\console.py", line 21, in __init__
    kernel_manager.start_kernel(show_banner=False)
  File "C:\ProgramData\Anaconda3\lib\site-packages\ipykernel\inprocess\manager.py", line 46, in start_kernel
    self.kernel = InProcessKernel(parent=self, session=self.session)
  File "C:\ProgramData\Anaconda3\lib\site-packages\ipykernel\inprocess\ipkernel.py", line 72, in __init__
    super(InProcessKernel, self).__init__(**traits)
  File "C:\ProgramData\Anaconda3\lib\site-packages\ipykernel\ipkernel.py", line 71, in __init__
    self.shell.displayhook.pub_socket = self.iopub_socket
  File "C:\ProgramData\Anaconda3\lib\site-packages\traitlets\traitlets.py", line 575, in __get__
    return self.get(obj, cls)
  File "C:\ProgramData\Anaconda3\lib\site-packages\traitlets\traitlets.py", line 538, in get
    default = obj.trait_defaults(self.name)
  File "C:\ProgramData\Anaconda3\lib\site-packages\traitlets\traitlets.py", line 1578, in trait_defaults
    return self._get_trait_default_generator(names[0])(self)
  File "C:\ProgramData\Anaconda3\lib\site-packages\traitlets\traitlets.py", line 975, in __call__
    return self.func(*args, **kwargs)
  File "C:\ProgramData\Anaconda3\lib\site-packages\ipykernel\inprocess\ipkernel.py", line 67, in _default_iopub_socket
    return self.iopub_thread.background_socket
  File "C:\ProgramData\Anaconda3\lib\site-packages\traitlets\traitlets.py", line 575, in __get__
    return self.get(obj, cls)
  File "C:\ProgramData\Anaconda3\lib\site-packages\traitlets\traitlets.py", line 538, in get
    default = obj.trait_defaults(self.name)
  File "C:\ProgramData\Anaconda3\lib\site-packages\traitlets\traitlets.py", line 1578, in trait_defaults
    return self._get_trait_default_generator(names[0])(self)
  File "C:\ProgramData\Anaconda3\lib\site-packages\traitlets\traitlets.py", line 975, in __call__
    return self.func(*args, **kwargs)
  File "C:\ProgramData\Anaconda3\lib\site-packages\ipykernel\inprocess\ipkernel.py", line 59, in _default_iopub_thread
    thread = IOPubThread(self._underlying_iopub_socket)
  File "C:\ProgramData\Anaconda3\lib\site-packages\ipykernel\iostream.py", line 71, in __init__
    self._setup_event_pipe()
  File "C:\ProgramData\Anaconda3\lib\site-packages\ipykernel\iostream.py", line 90, in _setup_event_pipe
    self._event_puller = ZMQStream(pipe_in, self.io_loop)
  File "C:\ProgramData\Anaconda3\lib\site-packages\zmq\eventloop\zmqstream.py", line 127, in __init__
    self._init_io_state()
  File "C:\ProgramData\Anaconda3\lib\site-packages\zmq\eventloop\zmqstream.py", line 552, in _init_io_state
    self.io_loop.add_handler(self.socket, self._handle_events, self.io_loop.READ)
  File "C:\ProgramData\Anaconda3\lib\site-packages\tornado\platform\asyncio.py", line 100, in add_handler
    self.asyncio_loop.add_reader(fd, self._handle_events, fd, IOLoop.READ)
  File "C:\ProgramData\Anaconda3\lib\asyncio\events.py", line 501, in add_reader
    raise NotImplementedError
NotImplementedError```

[CZDanol]

There are also experimental binary packages available now if you want to try that route. Oh maan that is such a life saver. I was having the exact same issue. I hate dealing with those obscure package managers, it’s just a bloatware and they never work properly.

[GeorgesPaul]

@GeorgesPaul If you grab a copy of the repo and run CQ-editor with python run.py do you get the same result?

In that case I get the following (not the same result):

CQ-editor-master>python run.py
  File "run.py", line 1
    ruimport os, sys, asyncio
             ^
SyntaxError: invalid syntax

My Conda environments use Python 3.8 as interpreters.

Did you install CQ-editor into your default environment, or create a new one?

Into the default environment (which is called “base” by default) as well as in a new environment. I tried to run cq-editor in both environments (after activating each environment individually and after installing cq-editor as per instructions for each conda environment). Both Conda environments give the same error message.

There are also experimental binary packages available now if you want to try that route.

I just tried this and this is a much easier way to get started and to play around with CQ. It could be a good idea to add this to a “Quick start” chapter in the manuals for CQ-editor and CadQuery for people (like myself) to have a quick peak at what the project is all about? The “non-binary way” to setup everything is really time consuming even for people who know some python who would happily use the software. I tried to pull request a link to the binaries into the CQ(editor) project readmes, but apparently stuff is not ready yet for that. Anyway, love the project now that I can fiddle around with it.