TypeError: cannot pickle '_curses.window' object

[raviandri]

Dear Junzis,

Very appreciate with pyModeS that could give me interesting use case as a noob on python.
I tried to run modeslive on windows environment but found error like this:

Traceback (most recent call last):
File "C:\Users*\AppData\Local\Programs\Python\Python39\Lib\site-packages\pyModeS\streamer\modeslive.py", line 140, in
screen_process.start()
File "C:\Users*\AppData\Local\Programs\Python\Python39\lib\multiprocessing\process.py", line 121, in start
self._popen = self._Popen(self)
File "C:\Users*\AppData\Local\Programs\Python\Python39\lib\multiprocessing\context.py", line 224, in _Popen
return _default_context.get_context().Process._Popen(process_obj)
File "C:\Users*\AppData\Local\Programs\Python\Python39\lib\multiprocessing\context.py", line 327, in _Popen
return Popen(process_obj)
File "C:\Users**\AppData\Local\Programs\Python\Python39\lib\multiprocessing\popen_spawn_win32.py", line 93, in init
reduction.dump(process_obj, to_child)
File "C:\Users\r**\AppData\Local\Programs\Python\Python39\lib\multiprocessing\reduction.py", line 60, in dump
ForkingPickler(file, protocol).dump(obj)
TypeError: cannot pickle '_curses.window' object

but otherwise on linux, the script can run well.

I've add pip install windows-curses but still can't work.

Is there any concern for windows environment?

[junzis]

I guess maybe you can try the Windows Linux Subsystem? https://docs.microsoft.com/en-us/windows/wsl/

Sorry that I don't have a better recommendation, since I haven't used windows for a very long time...

[paulmadejong]

I ran into the same issue on macOS and adding multiprocessing.set_start_method("fork") at the top (before any call that uses multiprocessing) fixed it for me.

[raviandri]

Thanks for your suggestion @paulmadejong. Will try it

[appaie]

hey ive got a similar problem
Windows Python 3.11.8 In PyCharm environment
`Package Version

---

numpy 1.26.4
pip 23.2.1
pymodes 2.17
pyrtlsdr 0.3.0
pyrtlsdrlib 0.0.2
pyzmq 24.0.1
setuptools 68.2.0
wheel 0.41.2
windows-curses 2.3.2`

i get this error:
File "E:\JetBrains\PycharmProjects\Diplomarbeit_Radar_im-Eigenheim\.venv\Scripts\modeslive.exe\__main__.py", line 7, in <module> File "E:\JetBrains\PycharmProjects\Diplomarbeit_Radar_im-Eigenheim\.venv\Lib\site-packages\pyModeS\streamer\modeslive.py", line 139, in main recv_process.start() File "E:\Python\Lib\multiprocessing\process.py", line 121, in start self._popen = self._Popen(self) ^^^^^^^^^^^^^^^^^ File "E:\Python\Lib\multiprocessing\context.py", line 224, in _Popen return _default_context.get_context().Process._Popen(process_obj) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "E:\Python\Lib\multiprocessing\context.py", line 336, in _Popen return Popen(process_obj) ^^^^^^^^^^^^^^^^^^ File "E:\Python\Lib\multiprocessing\popen_spawn_win32.py", line 95, in __init__ reduction.dump(process_obj, to_child) File "E:\Python\Lib\multiprocessing\reduction.py", line 60, in dump ForkingPickler(file, protocol).dump(obj) ValueError: ctypes objects containing pointers cannot be pickled

did the solution @paulmadejong stated fixed the issue and if yes could u explain the steps

id appreciate it thank u

best regards