On 3/5/20, Robin Becker <ro...@reportlab.com> wrote: > I want to be able to read a windows file which is being periodically written > by another process.
I'm having difficulty reconciling this sentence with the subject line. If you want to open a file for reading that's already open for writing, then the open has to share write access, not deny it (where to "deny" access means to not share access) [1]. That's not an issue since Python shares read and write access when opening a file. (Note that the share mode applies to all opens. It is not related to processes, so whether it's another process or the current process that's writing to the file is irrelevant to the problem.) I wouldn't use FILE streams in Python 3. I'd pass an `opener` to Python `open` that uses ctypes or PyWin32 to get a handle via `CreateFileW`, and then msvcrt.open_osfhandle to wrap the handle with a C file descriptor. The opener function signature is opener(filename, flags) -> fd. [1]: https://docs.microsoft.com/en-us/windows/win32/fileio/creating-and-opening-files _______________________________________________ python-win32 mailing list python-win32@python.org https://mail.python.org/mailman/listinfo/python-win32
