Cython is good, but sometimes it's a bit tricky to bend it to do exactly what you want[1]. You'll probably still want to write that hot piece in C... But gluing it with Cython is IMHO much nicer than using the plain Python API.
[1] - on the other hand, it comes with a tool explaining exactly how each of your lines of Cython looks in resulting C, with color-coding for high level overview of which pieces translated smoothly
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Cython is good, but sometimes it's a bit tricky to bend it to do exactly what you want[1]. You'll probably still want to write that hot piece in C... But gluing it with Cython is IMHO much nicer than using the plain Python API.
[1] - on the other hand, it comes with a tool explaining exactly how each of your lines of Cython looks in resulting C, with color-coding for high level overview of which pieces translated smoothly