Differences

This shows you the differences between two versions of the page.

--- python [2014/12/28 08:54] – [Cython helloworld] donghee
+++ python [2018/07/18 14:10] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
-====== Python bindng ======
+====== Python C/C++ bindng ======
 간단한 cad를 만들어 보는게 목표
  - glfw, glew을 binding 하여 써보자.
@@ Line 40: / Line 40: @@
 질문
  - pyx, pyd, pyi 의 역활 구분.
+----
+===== Cython Compiler =====
+win32에서 cythonize할때 사용하는 컴파일러는 mingw32와 ms의 visual c++이 있는데, ms에서 python용으로 vc를 준다.
+[[http://www.microsoft.com/en-us/download/confirmation.aspx?id=44266|Microsoft Visual C++ Compiler for Python 2.7]]
+----
+===== Cython Tutorial =====
+# Cython Tutorial 2015-1-1
+install
+Dockerfile
+<code>
+FROM debian:sid
+MAINTAINER Donghee Park <dongheepark@gmail.com>
+RUN apt-get update
+CMD echo "updated"
+RUN apt-get install vim python openssh-server -y
+CMD echo "vim and ssh package installed"
+RUN echo "Asia/Seoul" > /etc/timezone && dpkg-reconfigure -f noninteractive tzdata
+RUN echo 'root:docker' | chpasswd
+RUN /etc/init.d/ssh start
+RUN apt-get install build-essential python-pip python-dev -y
+RUN pip install cython
+CMD ["/bin/bash"]
+#
+</code>
+Makefile
+<code>
+cython helloworld.pyx
+gcc -g -O2 -fpic `python-config --cflags` -c helloworld.c -o helloworld.o
+gcc -shared -o helloworld.so helloworld.o `python-config --libs`
+</code>
+mycode.c
+<code>
+#include <stdio.h>
+int myfunc(int a, int b)
+{
+	printf("look we are within your c code!! \n");
+	return a+b;
+}
+</code>
+mycode.h
+<code>
+#ifndef __MYCODE_H__
+#define __MYCODE_H__
+extern int myfunc (int, int);
+#endif __MYCODE_H__
+</code>
+mycodecpy.pyx
+<code>
+cdef extern from "mycode.h"
+	cdef int myfunc (int, int)
+def callCfunc ():
+	print myfunc (1,2)
+</code>
+<code>
+cython mycodecpy.pyx
+gcc -g -O2 -fpic -c mycode.c -o mycode.o
+gcc -g -O2 -fpic -c mycodecpy.c -o mycodecpy `python-config --cflags`
+gcc -shared -o mycodecpy.so mycode.o mycodecpy.o `python-config --libs`
+</code>
+----
+===== xdress install =====
+llvm 3.4.2 in macos x 10.9
+<code>
+wget http://llvm.org/releases/3.4.2/clang+llvm-3.4.2-x86_64-apple-darwin10.9.xz
+#wget http://llvm.org/releases/3.4.2/clang+llvm-3.4.2-x86_64-linux-gnu-ubuntu-14.04.xz
+tar xvfz clang+llvm-3.4.2-x86_64-apple-darwin10.9.xz
+mv clang+llvm-3.4.2-x86_64-apple-darwin10.9 llvm-3.4.2-build
+export LLVM_CONFIG=llvm-3.4.2-build/bin/llvm-config
+git clone git://github.com/xdress/xdress.git
+cd xdress
+python setup.py build_ext --inplace
+sudo python setup.py install
+</code>
+<code>
+xdress --debug -p clang
+</code>
+----
+===== xdress 사용하기 =====
+c++ class 'A' python으로 binding 하기
+jehsrc/hoover.h
+<code>
+#if !defined(HOOVER)
+#define HOOVER
+namespace hoover {
+class A {
+ public:
+   float a;
+   double power(int n=1);
+};};
+#endif
+</code>
+----
+jehsrc/hoover.cpp
+<code>
+#include "hoover.h"
+double hoover::A::power(int n){
+  int i = 1;
+  double val = a;
+  while (i < n){val *= a; i++;};
+    return val;
+};
+</code>
+----
+jeh_xdressrc.py
+<code>
+package = 'jedgar'      # top-level python package name
+packagedir = 'jedgar'   # location of the python package
+builddir = 'jehbuild'
+classes = [('A', 'jehsrc/hoover.*')]
+</code>
+jeh_setup.py
+<code>
+import os
+from distutils.core import setup
+from distutils.extension import Extension
+from Cython.Distutils import build_ext
+import numpy as np
+cwd = os.getcwd()
+incdirs = [cwd, os.path.join(cwd, 'jehsrc'), np.get_include()]
+ext_modules = [
+    Extension("jedgar.hoover", ['jehsrc/hoover.cpp', "jedgar/hoover.pyx", ],
+    	include_dirs=incdirs, language="c++")
+    ]
+setup(
+  name = 'jedgar',
+  cmdclass = {'build_ext': build_ext},
+  ext_modules = ext_modules,
+  packages = ['jedgar']
+)
+</code>
+Makefile
+<code>
+all:
+        xdress --rc jeh_xdressrc.py
+        python jeh_setup.py build > /dev/null 2>&1
+clean:
+        rm -rf build
+        rm -rf jehbuild
+</code>
+----
+Hoover Example
+<code>
+from jedgar.hoover import A
+a = A()
+a.a = 10
+a.power(42)
+</code>