相关疑难解决方法(0)

以下代码适用于Python 2:

from ctypes import *

## Setup python file -> c 'FILE *' conversion :
class FILE(Structure):
    pass
FILE_P = POINTER(FILE)
PyFile_AsFile = pythonapi.PyFile_AsFile # problem here
PyFile_AsFile.argtypes = [py_object]
PyFile_AsFile.restype = FILE_P
fp = open(filename,'wb')
gd.gdImagePng(img, PyFile_AsFile(fp))

但在Python 3中,pythonapi中没有PyFile_AsFile.

代码是testPixelOps.py之外的代码.

介绍

假设我有这个C代码:

#include <stdio.h>

// Of course, these functions are simplified for the purposes of this question.
// The actual functions are more complex and may receive additional arguments.

void printout() {
    puts("Hello");
}
void printhere(FILE* f) {
    fputs("Hello\n", f);
}

我正在编译为共享对象(DLL): gcc -Wall -std=c99 -fPIC -shared example.c -o example.so

然后我将它导入到在Jupyter或IPython笔记本中运行的Python 3.x中:

import ctypes
example = ctypes.cdll.LoadLibrary('./example.so')

printout = example.printout
printout.argtypes = ()
printout.restype = None

printhere = example.printhere
printhere.argtypes = (ctypes.c_void_p) …