No module named 'wx._core' when running mavproxy

[blank-supportgis]

This might be more of a Python related issue. However, I'm only able to reproduce this error with MAVProxy, so I'll try it here first.

System:

Ubuntu 20.04 Python 3.8 MAVProxy 1.8.48, installed via pip wxPython 4.0.7

Problem:

When starting mavproxy.py, it immediately exits with the following error: janis@janis-ubuntu:~/drone/ardupilot/ArduCopter$ mavproxy.py ERROR LOADING MAVNATIVE - falling back to python implementation Traceback (most recent call last): File "/home/janis/.local/bin/mavproxy.py", line 44, in <module> from MAVProxy.modules.mavproxy_link import preferred_ports File "/home/janis/.local/lib/python3.8/site-packages/MAVProxy/modules/mavproxy_link.py", line 17, in <module> from MAVProxy.modules.lib.wx_addlink import MPMenulinkAddDialog File "/home/janis/.local/lib/python3.8/site-packages/MAVProxy/modules/lib/wx_addlink.py", line 6, in <module> import wx File "/home/janis/.local/lib/python3.8/site-packages/wx/__init__.py", line 17, in <module> from wx.core import * File "/home/janis/.local/lib/python3.8/site-packages/wx/core.py", line 12, in <module> from ._core import * ModuleNotFoundError: No module named 'wx._core' This problem only occurs with MavProxy, other example scripts using wxPython, like the follwing, work fine: ` import wx class MyFrame(wx.Frame): """ We simply derive a new class of Frame. """ def init(self, parent, title): wx.Frame.init(self, parent, title=title, size=(200,100)) self.control = wx.TextCtrl(self, style=wx.TE_MULTILINE) self.Show(True)

app = wx.App(False) frame = MyFrame(None, 'Small editor') app.MainLoop() ` This might have something to do with the organization of my Python installations, but I can't understand why this only happens with MAVProxy.

Steps to reproduce:

Use the following python dependencies in a virtual environment: 'aiogrpc==1.8 aiohttp==3.8.1 aioice==0.7.6 aiortc==1.3.2 aiosignal==1.2.0 anyio==3.6.2 APScheduler==3.10.1 argcomplete==2.0.0 argon2-cffi==21.3.0 argon2-cffi-bindings==21.2.0 astroid==2.15.2 asttokens==2.2.1 async-timeout==4.0.2 attrs==21.4.0 av==9.2.0 backcall==0.2.0 backports.zoneinfo==0.2.1 bidict==0.21.4 bleach==6.0.0 blobconverter==1.3.0 boto3==1.26.122 botocore==1.29.122 Cerberus==1.3.4 cffi==1.15.1 charset-normalizer==2.0.12 click==8.0.3 clientvideoservice==1.0 comm==0.1.3 coverage==6.3.2 cryptography==38.0.3 debugpy==1.6.7 depthai==2.21.2.0 depthai-sdk==1.9.4 dill==0.3.6 distinctipy==1.2.2 dnspython==2.2.1 dronekit==2.9.2 dronekit-sitl==3.3.0 empy==3.3.4 executing==1.2.0 fastjsonschema==2.16.3 ffmpeg-python==0.2.0 ffmpy3==0.2.4 filterpy==1.4.5 flake8==4.0.1 Flask==2.0.2 frozenlist==1.3.0 future==0.18.2 geocoder==1.38.1 gnureadline==8.1.2 google-crc32c==1.5.0 gpio4==0.0.8 grpcio==1.42.0 grpcio-tools==1.42.0 grpclib==0.4.3rc1 h2==4.1.0 hpack==4.0.0 hyperframe==6.0.1 importlib==1.0.4 importlib-metadata==6.0.0 importlib-resources==5.7.1 imutils==0.5.4 intelhex==2.3.0 ipykernel==6.22.0 ipython==8.12.1 ipython-genutils==0.2.0 ipywidgets==8.0.6 iso8601==2.1.0 isort==5.12.0 itsdangerous==2.0.1 jedi==0.18.2 Jinja2==3.0.3 jmespath==1.0.1 jsonschema==4.4.0 jupyter-events==0.6.3 jupyter_client==8.2.0 jupyter_core==5.3.0 jupyter_server==2.5.0 jupyter_server_terminals==0.4.4 jupyterlab-pygments==0.2.2 jupyterlab-widgets==3.0.7 kconfiglib==14.1.0 lazy-object-proxy==1.9.0 lxml==4.8.0 lz4==4.3.2 MarkupSafe==2.0.1 marshmallow==3.17.0 matplotlib-inline==0.1.6 MAVProxy==1.8.48 mavsdk==1.2.0 mcap==1.0.2 mcap-ros1-support==0.0.8 mccabe==0.6.1 mistune==2.0.5 mock==4.0.3 monotonic==1.6 multidict==5.2.0 nbclassic==0.5.6 nbclient==0.7.4 nbconvert==7.3.1 nbformat==5.8.0 nest-asyncio==1.5.6 netifaces==0.11.0 notebook==6.5.4 notebook_shim==0.2.3 numpy==1.24.3 nunavut==1.8.0 open3d==0.10.0.0 opencv-contrib-python==4.5.5.62 packaging==21.3 pandas==1.4.2 pandocfilters==1.5.0 parso==0.8.3 pexpect==4.8.0 pickleshare==0.7.5 Pillow==10.1.0 pkgconfig==1.5.5 platformdirs==3.2.0 prometheus-client==0.16.0 prompt-toolkit==3.0.38 protobuf==3.18.3 protoc-gen-mavsdk==1.1.0 psutil==5.9.0 ptyprocess==0.7.0 pure-eval==0.2.2 pycodestyle==2.8.0 pycparser==2.21 pydevd==2.9.6 pydsdl==1.16.0 pyee==9.0.4 pyflakes==2.4.0 pygame==2.1.2 Pygments==2.15.1 pylibsrtp==0.7.1 pylint==2.17.2 pymavlink==2.4.29 pymodes==2.16 pyOpenSSL==22.0.0 Pypubsub==4.0.3 PyQt5==5.15.5 PyQt5-Qt5==5.15.2 PyQt5-sip==12.12.1 pyros-genmsg==0.5.8 pyrsistent==0.18.1 pyrtlsdr==0.2.93 python-dateutil==2.8.2 python-engineio==4.3.1 python-json-logger==2.0.7 python-socketio==5.5.2 pytube==12.1.3 PyTurboJPEG==1.6.4 pytz==2022.1 pytz-deprecation-shim==0.1.0.post0 pyulog==0.9.0 pyusb==1.2.1 pyvirtualcam==0.10.2 PyYAML==6.0 pyzmq==24.0.1 Qt.py==1.3.8 ratelim==0.1.6 rel==0.4.7 requests==2.26.0 rfc3339-validator==0.1.4 rfc3986-validator==0.1.1 rosbags==0.9.11 ruamel.yaml==0.17.22 ruamel.yaml.clib==0.2.7 s3transfer==0.6.0 schedule==1.1.0 scipy==1.10.1 Send2Trash==1.8.2 sentry-sdk==1.5.1 serial==0.0.97 six==1.16.0 sniffio==1.3.0 stack-data==0.6.2 terminado==0.17.1 tinycss2==1.2.1 toml==0.10.2 tomli==2.0.1 tomlkit==0.11.7 tornado==6.3.1 traitlets==5.9.0 types-PySide2==5.15.2.1.5 typing_extensions==4.4.0 tzdata==2022.7 tzlocal==4.2 webcolors==1.13 websocket-client==1.3.1 websockets==10.2 Werkzeug==2.0.2 widgetsnbextension==4.0.7 wrapt==1.15.0 wxPython==4.0.7 wxwidgets==1.0.5 xmltodict==0.13.0 yarl==1.7.2 zipp==3.8.0 zstandard==0.21.0 '

Then simply call mavproxy.py

[stephendade]

Current version of wxpython is 4.2.1

Try upgrading to that.

[blank-supportgis]

Thanks,

I meanwhile had a look at my pip script under ~/.local/bin/pip and noticed that it's shebang (the first line starting with #!) was pointing to another python installation, located in a snap container for blender 2.93. I can absolutely not explain how this happened or why this should happen at all. After correcting this and installing wxpython again, this time in the correct location, mavproxy seems to be working.

It's a little unsatisfying though, since I still don't know the exact reason for the error. But then again, that's how most errors get resolved.