live EMG

[250955967]

Hi Niklas,
I am a novice in Myo-python. Recently when I run the live_EMG.ipynb, this error came to me.

---

AttributeError Traceback (most recent call last)
in
1 if name == 'main':
----> 2 main()

in main()
83 hub = myo.Hub()
84 listener = EmgCollector(512)
---> 85 with hub.run_in_background(listener.on_event):
86 Plot(listener).main()

AttributeError: 'Hub' object has no attribute 'run_in_background'

Would you please tell me how to solve this problem?

Thank you so much!
Deng

[NiklasRosenstein]

Hello @250955967 , do you have the latest version of the library installed?

Try pip install --upgrade myo-python, or inspect the version number using python -c 'import myo; print(myo.__version__)'

[250955967]

Hello Niklas,

Yes, I did not have the latest version. I have updated the version via your method. It works.
However, it cannot load the library now. In the previous version, it can load the library.

---

OSError Traceback (most recent call last)
in
1 if name == 'main':
----> 2 main()

in main()
80 def main():
81 #myo.init()
---> 82 myo.init(r'D:\project\EMG\Myo\myo-sdk-win-0.9.0\bin')
83 hub = myo.Hub()
84 listener = EmgCollector(512)

~\anaconda3\lib\site-packages\myo_ffi.py in init(lib_name, bin_path, sdk_path)
236
237 global libmyo
--> 238 libmyo = ffi.dlopen(lib_name)
239
240

~\anaconda3\lib\site-packages\cffi\api.py in dlopen(self, name, flags)
148 "or an already-opened 'void *' handle")
149 with self._lock:
--> 150 lib, function_cache = _make_ffi_library(self, name, flags)
151 self._function_caches.append(function_cache)
152 self._libraries.append(lib)

~\anaconda3\lib\site-packages\cffi\api.py in _make_ffi_library(ffi, libname, flags)
830 def _make_ffi_library(ffi, libname, flags):
831 backend = ffi._backend
--> 832 backendlib = _load_backend_lib(backend, libname, flags)
833 #
834 def accessor_function(name):

~\anaconda3\lib\site-packages\cffi\api.py in _load_backend_lib(backend, name, flags)
825 if first_error is not None:
826 msg = "%s. Additionally, %s" % (first_error, msg)
--> 827 raise OSError(msg)
828 return backend.load_library(path, flags)
829

OSError: cannot load library 'D:\project\EMG\Myo\myo-sdk-win-0.9.0\bin': error 0x7e. Additionally, ctypes.util.find_library() did not manage to locate a library called 'D:\project\EMG\Myo\myo-sdk-win-0.9.0\bin'

Thank you!