matplotlib-users Mailing List for matplotlib

>>>>> "Hans" == Hans Fangohr <H.F...@so...> writes:

    Hans> Hm. Have upgraded to 0.71. Now I don't get the error message
    Hans> anymore, however, once I close the figure window, the IDLE
    Hans> (-n) prompt doesn't respond anymore. (Same scenario as
    Hans> described in last email.)

    Hans> Ideas?
Well, if you are using matplotlib interactively from within IDLE< then
interactive : True should be set in your rc file, no?

JDH

Hi John,

>    Hans> The figure windows is interacting (despite the error
>    Hans> message). Once I close the figure window, I can't get back
>    Hans> to the Python prompt; i.e. the shell doesn't respond any
>    Hans> more.
>
>    Hans> Do we expect matplotlib (0.70.1) to work in non-interactive
>    Hans> mode with "IDLE -n"?
>
> This is an unrelated bug fixed in 0.71.
>
> Thanks for the report!

Hm. Have upgraded to 0.71. Now I don't get the error message anymore, 
however, once I close the figure window, the IDLE (-n) prompt doesn't 
respond anymore. (Same scenario as described in last email.)

Ideas?


> JDH
>
>
>
>
>
>
>
>

-------------------------------------------------
Dr Hans Fangohr

Computational Engineering & Design Research Group
School of Engineering Sciences
University of Southampton
Southampton, SO17 1BJ
United Kingdom

Location: Building 25, Room 1027
phone : +44 (0) 23 8059 8345
fax   : +44 (0) 23 8059 7082
email : fa...@so...
-------------------------------------------------

       Hi John,

I saw that you add in the load function the possibility to have some 
line comment with the character '%'. I would like to change this 
function and generalize a little bit this. Not everyone is using the 
character '%' but some other like '#' or '!'. So I add this possibilty 
to the function. I don't know if you are agree with it but in case I 
join the change below.
Another things, I think there are a small bug for the Tkagg backend. 
When I close the windows instead to come back to my shell I'm arriving 
in a python shell. I tried (when I had my laptop) with the Gtkagg 
backend and I didn't notice this problem.

Thanks.

    Nicolas



def load(fname,comments='%'):
    """
    Load ASCII data from fname into an array and return the array.

    The data must be regular, same number of values in every row

    fname can be a filename or a file handle

    matfile data is not currently supported, but see
    Nigel Wade's matfile ftp://ion.le.ac.uk/matfile/matfile.tar.gz

    Example usage:

    x,y = load('test.dat')  # data in two columns

    X = load('test.dat')    # a matrix of data

    x = load('test.dat')    # a single column of data

    """

    if is_string_like(fname):
        fh = file(fname)
    elif hasattr(fname, 'seek'):
        fh = fname
    else:
        raise ValueError('fname must be a string or file handle')
   
    X = []
    numCols = None
    for line in fh:
        line = line[:line.find(comments)].strip()
        if not len(line): continue
        row = [float(val) for val in line.split()]
        thisLen = len(row)
        if numCols is not None and thisLen != numCols:
            raise ValueError('All rows must have the same number of 
columns')
        X.append(row)

    X = array(X)
    r,c = X.shape
    if r==1 or c==1:
        X.shape = max([r,c]),
    return X

>>>>> "Hans" == Hans Fangohr <H.F...@so...> writes:

    Hans> The figure windows is interacting (despite the error
    Hans> message). Once I close the figure window, I can't get back
    Hans> to the Python prompt; i.e. the shell doesn't respond any
    Hans> more.

    Hans> Do we expect matplotlib (0.70.1) to work in non-interactive
    Hans> mode with "IDLE -n"?

This is an unrelated bug fixed in 0.71.

Thanks for the report!
JDH

Hi John,

I am coming back to our earlier discussion ...

>>>>>>> "Hans" == Hans Fangohr <H.F...@so...> writes:
>> 
>>> Hm. Done that. A figure window pops up immediately but is
>>> not being updated correctly: a part of the graph is visible,
>>> the other part of the figure (which was underneath another
>>> window initially) appears white. The titel of the figure
>>> says "Figure 1 (Not responding)".  IDLE, however, responds
>>> happily ;-) T
>> 
>> Todd, many moons ago you wrote me and said I had inadvertently screwed
>> up something in tkagg show that broke the idle -n behavior.  If I
>> recall correctly, we never reverted, since I didn't understand exactly
>> what to do.  Perhaps you could revisit the current tkagg versus the
>> old one to make sure it is right.
>> 
>> Hans, does it make a difference if you uncomment
>> 
>> #os.environ['PYTHONINSPECT'] = '1'
>> 
>> in the show method of
>> site-packages/matplotlib/backends/backend_tkagg.py? You should set
>> 'interactive : True' as Todd suggested.  Do not use show, as it is not
>> designed for interactive use.  I suggest carefully testing all 4
>> combinations: with and without the PYTHONINSPECTmline, and with and
>> without -n.
>
> Setting 'interactive=True' in .matplotlibrc
>
> IDLE           #os.environ['PYTHONINSPECT'] = '1'        -> fail
> IDLE -n        #os.environ['PYTHONINSPECT'] = '1'        -> fail
> IDLE           os.environ['PYTHONINSPECT'] = '1'         -> fail
> IDLE -n        os.environ['PYTHONINSPECT'] = '1'         -> success
>
> So that's good.

This doesn't work in non-interactive mode. What I observe is this:

- start Idle with -n (the "==== No Subprocess ====" message appears).
- at prompt issue commands:
>>>import pylab
>>>pylab.plot(range(10))
>>>pylab.show()
- figure windows shows up
- python reports this error message:

>>> pylab.show()
Exception in Tkinter callback
Traceback (most recent call last):
   File "C:\Python23\lib\lib-tk\Tkinter.py", line 1345, in __call__
     return self.func(*args)
   File 
"C:\Python23\lib\site-packages\matplotlib\backends\backend_tkagg.py",
line 215, in key_release
     FigureCanvasBase.key_release_event(self, key)
   File "C:\Python23\Lib\site-packages\matplotlib\backend_bases.py",
line 677, in key_release_event
     event = KeyEvent('key_release_event', self, key, self._lastx, 
self._lasty)
   File "C:\Python23\Lib\site-packages\matplotlib\backend_bases.py",
line 640, in __init__
     LocationEvent.__init__(self, name, canvas, x, y)
   File "C:\Python23\Lib\site-packages\matplotlib\backend_bases.py",
line 566, in __init__
     if a.in_axes(self.x, self.y):
   File "C:\Python23\Lib\site-packages\matplotlib\axes.py", line 1544, in 
in_axes
     return self.bbox.contains(xwin, ywin)
TypeError: float() argument must be a string or a number


The figure windows is interacting (despite the error message). Once I 
close the figure window, I can't get back to the Python prompt; i.e. the 
shell doesn't respond any more.

Do we expect matplotlib (0.70.1) to work in non-interactive mode with 
"IDLE -n"?

Thanks,

Hans