On 18.08.2012 14:38, Martin Tarenskeen wrote: > Where does that underscore in "_rtmidi" suddenly come from ???
The package struture is: rtmidi/ __init__.py _rtmidi.so release.py and the symbols from the _rtmidi module are imported into the package namespace in __init__.py. The _rtmidi.so file is the C extension compiled from the C source file rtmidi.c generated from the Cython file _rtmidi.pyx (in the src directory of the distribution). > ImportError: No module named _rtmidi I can't say why you got this without more detail, but if you follow the installation instructions in the README and have all the dependencies you should be ok. Chris