Python ctypes：Python文件对象<-> C文件* [英] Python ctypes: Python file object <-> C FILE *

问题描述

我正在使用ctypes用Python包装一个C库（我可以控制）。我想用声明包装一个C函数：

  int fread_int（FILE * stream）; 
  

现在；我想在python中打开文件，然后使用python文件对象（以某种方式使用？）来访问底层的FILE *对象并将其传递给C函数：

 ＃Python 
 fileH = open（file， r）
 value = ctypes_function_fread_int（?????）
 fileH.close（）
  

Python文件<-> FILE *是否完全可能映射？ / p>

Joakim

解决方案

我遇到了同样的问题。

看看这个文件：

http://svn.python.org/projects/ctypes/trunk/ctypeslib/ctypeslib/contrib/pythonhdr.py

您可以从中使用PyFile_AsFile。

I am using ctypes to wrap a C-library (which I have control over) with Python. I want to wrap a C-function with declaration:

int fread_int( FILE * stream );

Now; I would like to open file in python, and then use the Python file-object (in some way??) to get access to the underlying FILE * object and pass that to the C-function:

# Python
fileH = open( file , "r")
value = ctypes_function_fread_int( ????? )
fileH.close()

Is the Python file <-> FILE * mapping at all possible?

Joakim

解决方案

I've encountered the same problem.

Take a look at this file:

http://svn.python.org/projects/ctypes/trunk/ctypeslib/ctypeslib/contrib/pythonhdr.py

You can use PyFile_AsFile from it.

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