I've downloaded cython, and I can make a .pyx file (that's just a normal Python file with a .pyx extension), that executes in the Python shell, using: import pyximport; pyximport.install() I can generate a .c file at the command line with: cython file.pyx I can generate a .so file by building a standard setup.py and executing:

May 4, 2018 · @BasileStarynkevitch - Your assertions regarding Cython are incorrect. In fact, it is more compatible with Python code than the python interpreter itself as it supports all python syntax from 2.6 - 3.5 and can generate equivalent C-API code for it. What superset it may or may not support is irrelevant when discussing pure python code. –

Apr 1, 2019 · Here are the equivalent of all the Python types (if I do not miss some), taken from Oreilly book cython book. Python bool: bint (boolean coded on 4 bits, alias for short) Python int and long [unsigned] char [unsigned] short [unsigned] int [unsigned] long [unsigned] long long; Python float. float; double; long double; Python complex. float ...

Jan 27, 2014 · Cython recognises the usual Python for-in-range integer loop pattern: for i in range(n): ... If i is declared as a cdef integer type, it will optimise this into a pure C loop I wrote two versions of a simple Cython function, one using the Python range , the other one using the for-from Pyrex notation (which is supposed to be deprecated):

May 25, 2018 · Using Cython won't make a significant difference in this problem. To get a profile/benchmark of your code the Pycharm IDE has a profiling tool, or you can use kernprof. However, as a test, you can convert your code to the Cython code or C code with these instructions: Compile main Python program using Cython. Specifically, convert python code ...

Jun 30, 2022 · Interesting! Since results was in contradiction with the optimal computed time I though Cython was able to inline the function and make the same optimizations than Numba but actually no: in the generated C code, Cython still calls the standard_normal function using a __Pyx_PyObject_Call so it cannot be inlined.

I know what Cythons purpose is. It's to write compilable C extensions in a Python-like language in order to produce speedups in your code. What I would like to know (and can't seem to find using my google-fu) is if Cython can somehow compile into an executable format since it already seems to break python code down into C.

Feb 25, 2022 · Because of this, a typical Cython extension module is probably a little easier to decompile than a typical C program. In short you should assume: if you've messed up and deleted your .py/.pyx file then you should assume it's lost for good, and you can't get it back.

Dec 11, 2017 · From a Cython point-of-view the main problem is that cy_spin_flip requires the GIL. You need to add nogil to the end of its signature, and set the return type to void (since by default it returns a Python object, which requires the GIL).

Jul 15, 2014 · In order to define boolean objects in cython, they need to be defined as bint. According to here: The bint of "boolean int" object is compiled to a c int, but get coerced to and from Cython as booleans. Example: cdef bint boolean_variable = True source: types bint