[Tutor] Printing in the same place

[Alan Gauld]

On 17/08/11 09:02, Alan Gauld wrote:
> On 17/08/11 04:05, brandon w wrote:
> > I am trying to print in the same place to make a clock in a tkinter
> > window. I will loop the following code to update the time.
> This is not a tkinter program so its completely irrelevant to your
> stated aim. In tkinter how print works is of no importance. You will
> not be using print in a tkinter program you will simply be changing
> the text in a widget.
>
> > This seems to work but it is not printing in the same place:
> >
> > #!/usr/bin/python
> > #Python 2.6.6
> >
> > import time
> >
> > for t in range(5):
> > digits = time.strftime('%H:%M:%S')
> > print "\r", digits
> > time.sleep(0.1)
>
> That's because you are using \r which is platform dependant
> (and even terminal dependant on *nix) . You don't say which
> platform you are using. Using \b (backspace) may be more
> successful.
>
>  >>> print ("test","\b\b\b\b\b\b","Foo")
> Foo
>
> But, as I say, that won't be very useful in tkinter since you
> won't be using print().
>
Oops, you also need to suppress the newline as Peter Otten mentioned!
You can do that in Python v2 by adding a training comma or in v3 you can
specify no newline as a parameter.

But again, all irrelevent for tkinter.


-- 
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/