Python Common

c_call_python.c

// Python: 从 C 调用 Python
//
#include <Python.h>
// 有长度的字符串		
PyObject *r = PyObject_CallFunction(func, "s#", "str", 3);
// 以0结尾的字符串		
PyObject *r = PyObject_CallFunction(func, "s", "str with NUL terminate");
// 无符号整形 unsigned long
PyObject *r = PyObject_CallFunction(func, "k", 1988UL);
// 有符号整形 int
PyObject *r = PyObject_CallFunction(func, "i", -23);
// 更多类型信息请见 http://docs.python.org/c-api/arg.html

// 调用完之后使用 PyErr_Print() 可以打印出错信息
PyObject_CallFunction(...);
PyErr_Print();
/*
输出：
Traceback (most recent call last):
  File "./conn.py", line 121, in <module>
    raise
TypeError: exceptions must be old-style classes or derived from BaseException, not NoneType
*/

/*
编译选项：
-I /usr/include/python2.7
链接选项：
-lpython2.7
*/

python.py

# Python：IP 地址和 MAC 地址转换
#
def pack_ip(ipstr):
	return struct.unpack('L', socket.inet_aton(ipstr))[0]
# 结果为 unsigned long

def pack_mac(macstr):
	return struct.pack('BBBBBB', *[ int(i,16) for i in macstr.split(':') ])
# 结果为 char mac[6]