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The third parameter to PyObject_CallMethod(), ' (ii) ' is a format string, which indicates that the next arguments are two integers. Printf( ' Return of call : %d ', PyInt_AsLong(pValue)) PValue = PyObject_CallMethod(pInstance, argv, NULL) Call a method of the class with no parameters Call a method of the class with two parameters

#C BUILDER TUTORIAL CODE#

Here is the source file ' call_function.c':Д¬opy Code // call_class.c - A sample of python embedding // (calling python classes from C code) // Embedding basics: functions, classes and methodsДЇirst, let us start from a sample C program that calls a function within a Python module. For more details on the language, visit the official website. Best of all, it's free and the tools and libraries written for Python programmers are also free. Along with the available tools and libraries, Python makes a good language for modeling and simulation developers.

It supports a long list of great features that any programmer would expect, two of my favorite features are 'simple' and 'portable'. Python is a powerful interpreted language, like Java, Perl and PHP. Debug configuration requires Python debug library ' python24_d.lib', which is not delivered with normal distributions. With Visual C++, select the Release configuration to build. The environment that I have used to test is: Python 2.4 (Windows and Linux), Visual C++ 6.0 (Windows) or GCC 3.2 (RedHat 8.0 Linux).

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In order to use the source code, you should install a recent Python release, Visual C++ (or GCC compiler on Linux). See article: 'Embedding Python in C/C++: Part II'.

#C BUILDER TUTORIAL HOW TO#

The emphasis will be on how to integrate Python modules with your C/C++ applications. This tutorial does not teach the Python language systematically, but I will briefly describe how the Python code works when it comes up. Part II will move on to more advanced topics. Part I of this article series discusses the basics of Python embedding. The library is built with Python and distributed with all the recent Python releases. The API library provides a bunch of C routines to initialize the Python Interpreter, call into your Python modules and finish up the embedding. I am going to introduce C/C++ programmers to Python/C API, a C library that helps to embed python modules into C/C++ applications. Converting code into executables usually makes things even more complicated, as you must figure out how your C/C++ application communicates with the executable 'black-box'.

Some tools can help you generate the executable from a Python module. You might wonder if you can find a tool to convert them to C code, like the conversion from FORTRAN. You are experienced in C/C++, but fairly new to Python. Now, you have got some modules written in Python by others and you want to use them. Try to maintain Python's cross-platform compatibility when writing the embedding code.This is written for programmers who are more experienced in C/C++ than in Python, the tutorial takes a practical approach and omits all theoretical discussions.While writing this article, I had two objectives: Inspired by the article 'Embedding Python in Multi-Threaded C/C++ Applications' ( Linux Journal), I felt the need for a more comprehensive coverage on the topic of embedding Python.

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