はじめに
※AtCoderでのCythonについての記事は以下に書きました:
AtCoderのCythonでnumpyを使う方法の備忘録です。
フォーマット
以下のsetup.py
でコンパイルするフォーマットをPythonで実行することでnumpyを使用できます:
import sys
if sys.argv[-1] == 'ONLINE_JUDGE':
mycode = r'''
# distutils: language = c++
# cython: language_level = 3
cimport numpy as np # numpyが使える!!
def main():
pass # ここに書く
if __name__ == 'mycode':
main()
'''
with open('mycode.pyx', 'w') as f:
f.write(mycode)
setup = r'''
from distutils.core import setup, Extension
from Cython.Build import cythonize
from numpy import get_include
ext = Extension('mycode', sources = ['mycode.pyx'], include_dirs = ['.', get_include()])
setup(name = 'mycode', ext_modules = cythonize([ext]))
'''
with open('setup.py', 'w') as f:
f.write(setup)
import subprocess
with open('error.txt', 'w') as ef:
code = subprocess.run('python3.8 setup.py build_ext --inplace'.split(), stderr = ef).returncode
if code:
with open('error.txt', 'r') as ef:
with open('mycode.py', 'w') as f:
f.write(f'''
import sys
sys.stderr.write("""{ef.read()}""")
exit({code})
''')
exit()
import mycode