Exceptions on Some Demos

JonBL · July 2, 2011, 3:02am

I've used Add/Remove Software to install
python-matplotlib-0.98.5.2-2.fc10(i386) and
python-matplotlib-tk-0.98.5.2-2.fc10(i386) on my fedora 10 box, plus 11
dependencies, including Tkinter. Some matplotlib examples, eg pylab_examples
Examples/arctest.py works nicely, but many do not as presented.

Example api Examples/barchart_demo raises the following traceback when
executed as-is:

[jon@...3659... matplotlib-examples]$ ./barchart.py
Traceback (most recent call last):
  File "./barchart.py", line 18, in <module>
    error_kw=dict(elinewidth=6, ecolor='pink'))
  File "/usr/lib/python2.5/site-packages/matplotlib/pyplot.py", line 1656,
in bar
    ret = gca().bar(*args, **kwargs)
  File "/usr/lib/python2.5/site-packages/matplotlib/axes.py", line 4075, in
bar
    r.update(kwargs)
  File "/usr/lib/python2.5/site-packages/matplotlib/artist.py", line 548, in
update
    raise AttributeError('Unknown property %s'%k)
AttributeError: Unknown property error_kw

(I've copied the example code into script barchart.py, and run it from
there.)

The problem line is:

rects1 = plt.bar(ind, menMeans, width,
                    color='r',
                    yerr=menStd,
                    error_kw=dict(elinewidth=6, ecolor='pink'))

If I replace this with:

rects1 = plt.bar(ind, menMeans, width,
color='r',
yerr=menStd)

and do the same thing for the rects2 statement, the demonstration then
presents the bar chart.

The problem seems to lie somewhere with the error_kw arg being passed to
method plt.bar. Is there something else I need to do to get the provided
examples to work as coded?

TIA,
Jon

···

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Benjamin_Root · July 2, 2011, 6:57pm

Jon,

The examples on the website are for version 1.0.1, which is a couple of years older than version 0.98. Many examples utilizes new features that have since been added to matplotlib.

Also, as a side note, Fedora 10 has stopped receiving updates of any kind about 2 years ago. This also means security updates.

Ben Root

···

On Fri, Jul 1, 2011 at 10:02 PM, JonBL <jc.blake@…636…> wrote:

I’ve used Add/Remove Software to install

python-matplotlib-0.98.5.2-2.fc10(i386) and

python-matplotlib-tk-0.98.5.2-2.fc10(i386) on my fedora 10 box, plus 11

dependencies, including Tkinter. Some matplotlib examples, eg pylab_examples

Examples/arctest.py works nicely, but many do not as presented.

Example api Examples/barchart_demo raises the following traceback when

executed as-is:

[jon@…3659… matplotlib-examples]$ ./barchart.py

Traceback (most recent call last):

File “./barchart.py”, line 18, in
error_kw=dict(elinewidth=6, ecolor='pink'))
File “/usr/lib/python2.5/site-packages/matplotlib/pyplot.py”, line 1656,

in bar
ret =  gca().bar(*args, **kwargs)
File “/usr/lib/python2.5/site-packages/matplotlib/axes.py”, line 4075, in

bar
r.update(kwargs)
File “/usr/lib/python2.5/site-packages/matplotlib/artist.py”, line 548, in

update
raise AttributeError('Unknown property %s'%k)
AttributeError: Unknown property error_kw

(I’ve copied the example code into script barchart.py, and run it from

there.)

The problem line is:

rects1 = plt.bar(ind, menMeans, width,
                color='r',

                yerr=menStd,

                error_kw=dict(elinewidth=6, ecolor='pink'))
If I replace this with:

rects1 = plt.bar(ind, menMeans, width,
                color='r',

                yerr=menStd)
and do the same thing for the rects2 statement, the demonstration then

presents the bar chart.

The problem seems to lie somewhere with the error_kw arg being passed to

method plt.bar. Is there something else I need to do to get the provided

examples to work as coded?

TIA,

Jon

JonBL · July 3, 2011, 12:48am

Thanks, Ben. I'll install 1.0.1. I'm aware of the situation about Fedora 10.

Regards,
Jon

Benjamin Root-2 wrote:

···

On Fri, Jul 1, 2011 at 10:02 PM, JonBL <jc.blake@...636...> wrote:

I've used Add/Remove Software to install
python-matplotlib-0.98.5.2-2.fc10(i386) and
python-matplotlib-tk-0.98.5.2-2.fc10(i386) on my fedora 10 box, plus 11
dependencies, including Tkinter. Some matplotlib examples, eg
pylab_examples
Examples/arctest.py works nicely, but many do not as presented.

Example api Examples/barchart_demo raises the following traceback when
executed as-is:

[jon@...3659... matplotlib-examples]$ ./barchart.py
Traceback (most recent call last):
File "./barchart.py", line 18, in <module>
   error_kw=dict(elinewidth=6, ecolor='pink'))
File "/usr/lib/python2.5/site-packages/matplotlib/pyplot.py", line 1656,
in bar
   ret = gca().bar(*args, **kwargs)
File "/usr/lib/python2.5/site-packages/matplotlib/axes.py", line 4075,
in
bar
   r.update(kwargs)
File "/usr/lib/python2.5/site-packages/matplotlib/artist.py", line 548,
in
update
   raise AttributeError('Unknown property %s'%k)
AttributeError: Unknown property error_kw

(I've copied the example code into script barchart.py, and run it from
there.)

The problem line is:

rects1 = plt.bar(ind, menMeans, width,
                   color='r',
                   yerr=menStd,
                   error_kw=dict(elinewidth=6, ecolor='pink'))

If I replace this with:

rects1 = plt.bar(ind, menMeans, width,
                   color='r',
                   yerr=menStd)

and do the same thing for the rects2 statement, the demonstration then
presents the bar chart.

The problem seems to lie somewhere with the error_kw arg being passed to
method plt.bar. Is there something else I need to do to get the provided
examples to work as coded?

TIA,
Jon

Jon,

The examples on the website are for version 1.0.1, which is a couple of
years older than version 0.98. Many examples utilizes new features that
have since been added to matplotlib.

Also, as a side note, Fedora 10 has stopped receiving updates of any kind
about 2 years ago. This also means security updates.

Ben Root

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