felixhekhorn
commented
1 year ago Cython and numba:
- https://stackoverflow.com/questions/43016076/calling-cython-functions-from-numba-jitted-code
- https://numba.pydata.org/numba-doc/latest/extending/high-level.html#importing-cython-functions
Cython submodules:
myfilea.pyx
```cython # cython: language_level=3 from src2.myfile2 import f2 cpdef api double foo(double x): return x * f2(x) ```src2/myfile2.pyx
```cython # cython: language_level=3 def f2(x): return 2.*x*x ```pkgcy/__init__.py
```python from scipy.integrate import quad import os # if os.environ.get("BUILD_WHEEL",False): # pass # else: # import pyximport; pyximport.install() # from myfilea import f3a as g # # import myfile import numba as nb import ctypes from numba.extending import get_cython_function_address addr = get_cython_function_address("myfilea", "foo") functype = ctypes.CFUNCTYPE(ctypes.c_double, ctypes.c_double) myexp = functype(addr) @nb.njit def f(x): return x * myexp(x) def run(): # print(myfile.__pyx_capi__) # return f(10.) return quad(f, 0.,1.) ```and
- empty
src2/__init__.pyd $ cythonize -X language_level=3 -f -a -i myfilea.pyx src2/myfile2.pyx
alecandido
related to #185 - for the moment I use this issue to save my work on a different place than just my computer ... eventually, I think, I can turn this into an PR.
at the moment it seems doing just
poetry buildis not enough, but doing just before acythonize -X language_level=3 -a -i myfile.pyxseems to be sufficientcc @scarrazza
Resources
Files
`pyproject.toml`
```toml [tool.poetry] name = "pkgcy" version = "0.0.0" description = "Blubbes" authors = ["Lorem Ipsum`pkgcy/__init__.py`
```py from scipy.integrate import quad import os if os.environ.get("BUILD_WHEEL",False): pass else: import pyximport; pyximport.install() from myfile import f as g def f(x): return x def run(): return quad(g, 0.,1.) ````mybuild.py`
```py import os # See if Cython is installed try: from Cython.Build import cythonize # Do nothing if Cython is not available except ImportError: # Got to provide this function. Otherwise, poetry will fail def build(setup_kwargs): pass # Cython is installed. Compile else: # from setuptools import Extension # from setuptools.dist import Distribution from distutils.command.build_ext import build_ext # This function will be executed in setup.py: def build(setup_kwargs): # The file you want to compile extensions = [ "myfile.pyx" ] # gcc arguments hack: enable optimizations os.environ['CFLAGS'] = '-O3' # Build setup_kwargs.update({ 'ext_modules': cythonize( extensions, language_level=3, compiler_directives={'linetrace': True}, ), 'cmdclass': {'build_ext': build_ext} }) ````myfile.pyx`
```cython # cython: language_level=3 def f(x): return x*x*x ```