Question

In Python I open a temporary file for write by using tempfile.mkstemp in order to be sure that the file is destroyed when released (even if application crashes).

Now I need to pass this file to another application but this application is not going to be able to open the file as long the file is opened for write.

Can I change the access mode or reopen the file without changing the file handle in order to prevent it from being deleted too soon?

Update: opening the file in read mode does not solve the problem, the file must be opened in shared mode.

Answer 1

There is no documented way to switch the file modes (r, w, a) for an open file.

Instead of TempFile, consider using mmap to share data between programs.