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.

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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.

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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!