How often does python flush to a file?

Question

1. How often does Python flush to a file?
2. How often does Python flush to stdout?

I\'m unsure about (1).

As for (2), I believe Python flush

Answer 1

You can also force flush the buffer to a file programmatically with the flush() method.

with open('out.log', 'w+') as f:
    f.write('output is ')
    # some work
    s = 'OK.'
    f.write(s)
    f.write('\n')
    f.flush()
    # some other work
    f.write('done\n')
    f.flush()

I have found this useful when tailing an output file with tail -f.