Simple memfd_create wrapper in python

memfd_create.py

class memfd_create:
    '''create in memory file with actual fileno using memfd_create
    usage:
        with memfd_create('file_name') as f:
            pass # treat f as file-like in binary mode
    '''
    import ctypes, os
    _libc = ctypes.CDLL(None)
    _syscall = _libc.syscall
    def __init__(self, name:str):
        self.fd = self._syscall(319, name, 1)
    def __enter__(self):
        self.fp = self.os.fdopen(self.fd, 'r+b')
        return self.fp
    def __exit__(self, err_type, err_value, traceback):
        self.fp.close()