On Python 3, print is thread safe. But Python 2 has broken scenario:
print "spam", "spam", "spam" # thread 1 print "eggs", "eggs", "eggs" # thread 2 In this case, 2 lines are mixed. In your case, "spam spam spam" and "eggs eggs eggs" are not mixed. But newline is mixed like: spam spam spameggs eggs eggs eggs eggs eggsspam spam spam eggs eggs eggs spam spam spam On Mon, Aug 11, 2014 at 4:44 PM, Steven D'Aprano <st...@pearwood.info> wrote: > Specifically for Python 2.6 and 2.7, but answers for 3.x appreciated as > well. > > Is print thread safe? That is, if I have two threads that each call > print, say: > > print "spam spam spam" # thread 1 > print "eggs eggs eggs" # thread 2 > > I don't care which line prints first, but I do care if the two lines are > mixed in together, something like this: > > spam spaeggs eggs m seggspams > > > Does print perform its own locking to prevent this? > > > > -- > Steven > -- > https://mail.python.org/mailman/listinfo/python-list -- INADA Naoki <songofaca...@gmail.com> -- https://mail.python.org/mailman/listinfo/python-list
