cythonize

By default cdef attributes are only accessible from within Cython. If you make it a public attribute with cdef public in front of the attribute name then Cython will generate suitable properties to be able to access it from Python. Some extra notes about related problems: If you’re getting the same error from within Cython … Read more

People are tempted to do this because it’s fairly easy to do for the simplest case (one module, no dependencies). @ead’s answer is good but honestly pretty fiddly and it is handling the next simplest case (two modules that you have complete control of, no dependencies). In general a Python program will depend on a … Read more