print problem

Gabriel Genellina gagsl-py2 at yahoo.com.ar
Tue Jun 17 08:53:59 CEST 2008


En Tue, 17 Jun 2008 03:15:11 -0300, pirata <pirata at mars.invalid> escribió:

> I was trying to print a dot on console every second to indicates
> running process, so I wrote, for example:
>
> for i in xrange(10):
>     print ".",
>     time.sleep(1)
>
> Idealy, a dot will be printed out each second. But there is nothing
> print out until after 10 seconds, all 10 dots come out together.
>
> I've tried lose the comma in the print statement, and it works.
>
> Is that because of the print statement buffer the characters until
> there is a new line character?

Very probably, altough I can't reproduce it on Windows. Try invoking the script with python -u (unbuffered input/output):

python -u your_script.py

-- 
Gabriel Genellina




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