Calling the function Structs and metaclasses Next in the series Last time we’ve looked at using ctypes to call C API, and writing extension module using Python/C API. Now we can finally tie these two together - looking at how ctypes is actually implem...
FastIntType itself is an PyObject tp_new field defines the new function tp_methods define list of methods tp_members define its members In my previous post we’ve briefly looked at using ctypes module to call C APIs. In this post let’s dive into a ...
defadd(a=,b=):print('Function of python called!')print('a=',a)print('b=',b)print('a+b=',a+b) 1. 2. 3. 4. 5. 2.C代码 #include#include#includeintmain(intargc,char**argv){//初始化,载入python的扩展模块Py_Initialize();//判断初始化是否成功if(!Py_IsInitialized()){printf("...
/* Python call:f(((0, 0), (400, 300)), (10, 10))*/ //Py_complex c; //int ok = PyArg_ParseTuple(args, "D:myfunction", &c); /* a complex, also providing a function name for errors */ /* Python call: myfunction(1+2j) */ //按整形"i"获得传入的整形数据,存入num if ...
1 PyModuleRunFunction("hello", "test", "", 0, "()"); 这样我们就实现了再c中调用python的方法。下面我们再来开心python怎么调用c中的方法。 初始化c实现的python模块 为了能在python脚本中调用到c中定义的方法,需要先在c中定义一个python模块,然后在脚本中import这个模块,最后通过这个模块来间接调用c中定义...
ctypes.CFUNCTYPE(restype, *argtypes, use_errno=False, use_last_error=False)The returned function prototype creates functions that use the standard C calling convention. The function will release the GIL during the call. If use_errno is set to true, the ctypes private copy of the system errno...
在CALL_FUNCTION中,Python同样会执行对应类型的tp_call操作。所以创建实例的时候,显然执行PyType_Type的tp_call,因此最终是在PyType_Type.tp_call中调用Girl.tp_new来创建instance对象的。 需要注意的是,在创建class Girl这个对象时,Python虚拟机调用PyType_Ready对class Girl进行了初始化,其中一项动作就是继承基类,...
# define our clearfunctiondefclear():#forwindowsifname=='nt':_=system('cls')#formac andlinux(here,os.name is'posix')else:_=system('clear')# print out some textprint('Hello CWIKIUS\n'*10)# sleepfor2seconds after printing outputsleep(2)# now callfunctionwe defined aboveclear() ...
# Python 3.6a2 3372 (MAKE_FUNCTION simplification, remove MAKE_CLOSURE # #27095) # Python 3.6b1 3373 (add BUILD_STRING opcode #27078) # Python 3.6b1 3375 (add SETUP_ANNOTATIONS and STORE_ANNOTATION opcodes # #27985) # Python 3.6b1 3376 (simplify CALL_FUNCTIONs & BUILD_MAP_UNPACK_WITH...
8 CALL_FUNCTION 1 10 POP_TOP 12 LOAD_CONST 1 (None) 14 RETURN_VALUE 上面的字节码,背后就是 python 程序提供的一些基本操作。比如LOAD_CONST,加载常数 1 进入内存。你可以在这里找到所有的字节码。 一句话总结,CPython就是一个可以执行你写的python代码的另一个由 C 语言写的程序。