Python 2.7: Print thread safe

Question

I've seen a similar post here however it refers to Python 2.6 and I was hoping there was an easier way.

From reading the thread it seems the best way is to just replace all my print statements with sys.stdout.write(s + '\n') ?

I was hoping there was a nicer way that allowed me still to use print

score 13 · Accepted Answer · answered Oct 24 '11 at 15:19

13

from __future__ import print_function
print = lambda x: sys.stdout.write("%s\n" % x)

Is a nice cheap and dirty hack.

answered Oct 24 '11 at 15:19

Jakob Bowyer

awesome. Is there any downside to always adding this to a python file? (i.e. why not always have thread safety) – Setheron Oct 24 '11 at 15:22
It doesn't handle [`print() keyword arguments`](http://docs.python.org/library/functions.html#print). As well as it makes output always unbuffered. – Maxim Egorushkin Oct 24 '11 at 15:53
As I said. Its a cheap and dirty hack. Its not the "right" way to do it but it gets the job done. – Jakob Bowyer Oct 24 '11 at 23:23
you can add sys.stdout.flush() at the end of the lambda too – Michael Vain Feb 05 '13 at 12:10
Is it documented somewhere that `sys.stdout.write` is thread safe? – Ciro Santilli OurBigBook.com Dec 16 '18 at 18:34

score 0 · Answer 2 · answered Dec 14 '15 at 06:28

0

I found that the following works on both multi-thread&multi-process environment, very simple:

def sprint(content):
    print("{0}~{1}\r".format(str(datetime.datetime.now()), content))

answered Dec 14 '15 at 06:28

2 Answers2