The PyFile API¶
In Python 3, the PyFile API was reduced to a few functions, and is now meant for internal interpreter use.
Python files (and file-like objects) should be manipulated with the API defined
by the io module.
But, in the real world, some C libraries only provide debugging output to
FILE*. For cases like this, py3c provides a quick-and-dirty replacement
for PyFile_AsFile():
-
FILE*
py3c_PyFile_AsFileWithMode(PyObject *py_file, const char *mode)¶ Open a (file-backed) Python file object as
FILE*.Parameters: - py_file – The file object, which must have a working
fileno()method - mode – A mode appropriate for
fdopen, such as'r'or'w'
This function presents several caveats:
- Only works on file-like objects backed by an actual file
- All C-level writes should be done before additional Python-level writes are allowed (e.g. by running Python code).
- Though the function tries to flush, due to different layers of buffering there is no guarantee that reads and writes will be ordered correctly.
- py_file – The file object, which must have a working