cythonで"hello world"
こんな訳で、cythonでHello Worldしてみた。自宅にあるMacだとC-compilerを別で入れる必要が無いのは楽ちんですねー。*1
ちなみに自前環境ではAnacondaていうNumpyとかとかが入っているものにcython自体も入っておりインストール不要でした。
以下、自分用のメモってことで。用意するのは実行したいファイル(hello.pyx)と、コンパイル用のファイル(setup.py)の2つ。
- hello.pyx
def hello(): print "Hello World!!"
- setup.py
try: from setuptools import setup from setuptools import Extension except ImportError: from distutils.core import setup from distutils.extension import Extension from Cython.Distutils import build_ext hello_modules = [Extension("hello", ["hello.pyx"])] setup( name = 'C extention module example', cmdclass = {'build_hello': build_ext}, ext_modules = hello_modules )
でもって、Terminalでコンパイルしようとしてみる：
$ python setup.py build_ext --inplace running build_ext cythoning hello.pyx to hello.c building 'hello' extension creating build creating build/temp.macosx-10.5-x86_64-2.7 gcc -fno-strict-aliasing -I/Users/kyoro1/anaconda/include -arch x86_64 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I/Users/kyoro1/anaconda/include/python2.7 -c hello.c -o build/temp.macosx-10.5-x86_64-2.7/hello.o Agreeing to the Xcode/iOS license requires admin privileges, please re-run as root via sudo. error: command 'gcc' failed with exit status 69
はい、エラー出るねー。調べてみたら、XCodeのlicenseに引っ掛かってましたとさ、、、stackoverflow.com
ということで、
sudo xcrun cc
pip install junos-eznc
で、licenseを通してから再度buildに挑戦！*2
$ python setup.py build_ext --inplace running build_ext skipping 'hello.c' Cython extension (up-to-date) building 'hello' extension gcc -fno-strict-aliasing -I/Users/kyoro1/anaconda/include -arch x86_64 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I/Users/kyoro1/anaconda/include/python2.7 -c hello.c -o build/temp.macosx-10.5-x86_64-2.7/hello.o hello.c:1423:28: warning: unused function '__Pyx_PyObject_AsString' [-Wunused-function] static CYTHON_INLINE char* __Pyx_PyObject_AsString(PyObject* o) { ^ hello.c:1420:32: warning: unused function '__Pyx_PyUnicode_FromString' [-Wunused-function] static CYTHON_INLINE PyObject* __Pyx_PyUnicode_FromString(const char* c_str) { ^ hello.c:322:29: warning: unused function '__Pyx_Py_UNICODE_strlen' [-Wunused-function] static CYTHON_INLINE size_t __Pyx_Py_UNICODE_strlen(const Py_UNICODE *u) ^ hello.c:1485:26: warning: unused function '__Pyx_PyObject_IsTrue' [-Wunused-function] static CYTHON_INLINE int __Pyx_PyObject_IsTrue(PyObject* x) { ^ hello.c:1535:33: warning: unused function '__Pyx_PyIndex_AsSsize_t' [-Wunused-function] static CYTHON_INLINE Py_ssize_t __Pyx_PyIndex_AsSsize_t(PyObject* b) { ^ hello.c:1560:33: warning: unused function '__Pyx_PyInt_FromSize_t' [-Wunused-function] static CYTHON_INLINE PyObject * __Pyx_PyInt_FromSize_t(size_t ival) { ^ hello.c:1118:32: warning: unused function '__Pyx_PyInt_From_long' [-Wunused-function] static CYTHON_INLINE PyObject* __Pyx_PyInt_From_long(long value) { ^ hello.c:1165:27: warning: function '__Pyx_PyInt_As_long' is not needed and will not be emitted [-Wunneeded-internal-declaration] static CYTHON_INLINE long __Pyx_PyInt_As_long(PyObject *x) { ^ hello.c:1270:26: warning: function '__Pyx_PyInt_As_int' is not needed and will not be emitted [-Wunneeded-internal-declaration] static CYTHON_INLINE int __Pyx_PyInt_As_int(PyObject *x) { ^ 9 warnings generated. creating build/lib.macosx-10.5-x86_64-2.7 gcc -bundle -undefined dynamic_lookup -L/Users/kyoro1/anaconda/lib -arch x86_64 -arch x86_64 build/temp.macosx-10.5-x86_64-2.7/hello.o -L/Users/kyoro1/anaconda/lib -o build/lib.macosx-10.5-x86_64-2.7/hello.so copying build/lib.macosx-10.5-x86_64-2.7/hello.so ->
で、お目当てのものを実行でござる。
$ python Python 2.7.10 |Anaconda 2.3.0 (x86_64)| (default, May 28 2015, 17:04:42) [GCC 4.2.1 (Apple Inc. build 5577)] on darwin Type "help", "copyright", "credits" or "license" for more information. Anaconda is brought to you by Continuum Analytics. Please check out: http://continuum.io/thanks and https://binstar.org >>> import hello >>> hello.hello() Hello World!!
てな具合で、"Hello World!!"できました、とさ♪
- 参考URL
- 作者: Kurt W. Smith,中田秀基,長尾高弘
- 出版社/メーカー: オライリージャパン
- 発売日: 2015/06/19
- メディア: 大型本
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