I wrote a simple program in python:
// main.py
import re
links = re.findall('(https?://S+)', 'http://google.pl http://youtube.com')
print(links)
Then I execute this:
cython main.py
It was generated a file: main.c And then I tried this:
gcc main.c
And I have an error:
main.c:8:10: fatal error: 'pyconfig.h' file not found
#include "pyconfig.h"
^
1 error generated.
How to compile python to c ? How to get started with cython with xcode on mac ?
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Answer
You have to tell the gcc compiler where is the pyconfig.h file on your system using the -I flag. You can find it using the find program.
A simpler way to compile the module is using a setup.py module. Cython provides a cythonize function that starts this process for a .pyx module.
Another point you are missing is that Cython files usually define helper functions to be used from a main Python module.
Suppose you have the following setup as for dirs and files:
cython-start/ ├── main.py ├── setup.py └── split_urls.pyx
The contents of the setup.py are
from distutils.core import setup
from Cython.Build import cythonize
setup(name="My first Cython app",
ext_modules=cythonize('split_urls.pyx'), # accepts a glob pattern
)
The contents of the split_urls.pyx file are
import re
def do_split(links):
return re.findall('(https?://S+)', links)
And it is the main.py module which uses the defined Cython function:
import split_urls URLS = 'http://google.pl http://youtube.com' print split_urls.do_split(URLS)
Compile the Cython module by issuing:
$ python setup.py build_ext --inplace Cythonizing split_urls.pyx running build_ext building 'split_urls' extension creating build creating build/temp.macosx-10.9-x86_64-2.7 ... compiler output ...
And check that your main module is doing what it is supposed to do:
$ python main.py ['http://google.pl', 'http://youtube.com']