Can I save a text file in python without closing it?

Question

I am writing a program in which I would like to be able to view a log file before the program is complete. I have noticed that, in python (2.7 and 3), that file.write(

Answer 1

This will write the file to disk immediately:

file.flush()
os.fsync(file.fileno())

According to the documentation https://docs.python.org/2/library/os.html#os.fsync

Force write of file with filedescriptor fd to disk. On Unix, this calls the native fsync() function; on Windows, the MS _commit() function.

If you’re starting with a Python file object f, first do f.flush(), and then do os.fsync(f.fileno()), to ensure that all internal buffers associated with f are written to disk.