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> Would you mind opening up an issue on github - this is definitely
> a bug (http://matplotlib.org/faq/troubleshooting_faq.html).

Done: https://github.com/matplotlib/matplotlib/issues/2104

Skip

Agreed. I've seen this a couple of times but never reproduced it so
elegantly. Would you mind opening up an issue on github - this is
definitely a bug (http://matplotlib.org/faq/troubleshooting_faq.html).

Thanks!


P.S. Welcome to the mailinglist :-)


On 31 May 2013 16:02, Skip Montanaro <sk...@po...> wrote:

> I'm not sure of the correct protocol (I just subscribed to report this
> problem), but the documentation said to report bugs here, and I saw no
> mention of this in Google searches of the list archives.
>
> The exception_to_str() function was changed between mpl 1.1 and 1.2.
> In my installation I show it going from this:
>
> def exception_to_str(s = None):
>
>     sh = StringIO.StringIO()
>     if s is not None: print >>sh, s
>     traceback.print_exc(file=sh)
>     return sh.getvalue()
>
> to this:
>
> def exception_to_str(s=None):
>
>     sh = io.StringIO()
>     if s is not None:
>         print(s, file=sh)
>     traceback.print_exc(file=sh)
>     return sh.getvalue()
>
> At first glance, the change seems innocuous enough, but I think it
> introduced an error.  (It appears that mpl 1.2 is supposed to work on
> Python 2.7 and 3.x.) From a thread I started on comp.lang.python
> (http://thread.gmane.org/gmane.comp.python.general/733938), it appears
> that io.StringIO instances only accept Unicode strings as input.
> Unless v 1.2 is only supposed to run on Python 3 (that doesn't seem to
> be the case), you need to do something to convert the traceback
> module's output to Unicode before feeding to the io.StringIO object.
>
> Here's a simple demonstration of the problem:
>
> % python2.7
> Python 2.7.5+ (2.7:93eb15779050, May 30 2013, 15:27:39)
> [GCC 4.4.6 [TWW]] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import traceback, StringIO, io
> >>> s1 = StringIO.StringIO()
> >>> traceback.print_stack(file=s1)
> >>> print repr(s1.getvalue())
> '  File "<stdin>", line 1, in <module>\n'
> >>>
> >>> s2 = io.StringIO()
> >>> traceback.print_stack(file=s2)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/home/skipm/x86_64-linux3.1/lib/python2.7/traceback.py", line
> 269, in print_stack
>     print_list(extract_stack(f, limit), file)
>   File "/home/skipm/x86_64-linux3.1/lib/python2.7/traceback.py", line
> 23, in print_list
>     '  File "%s", line %d, in %s' % (filename,lineno,name))
>   File "/home/skipm/x86_64-linux3.1/lib/python2.7/traceback.py", line
> 13, in _print
>     file.write(str+terminator)
> TypeError: unicode argument expected, got 'str'
>
> Skip Montanaro
> sk...@po...
>
>
> ------------------------------------------------------------------------------
> Get 100% visibility into Java/.NET code with AppDynamics Lite
> It's a free troubleshooting tool designed for production
> Get down to code-level detail for bottlenecks, with <2% overhead.
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>

I'm not sure of the correct protocol (I just subscribed to report this
problem), but the documentation said to report bugs here, and I saw no
mention of this in Google searches of the list archives.

The exception_to_str() function was changed between mpl 1.1 and 1.2.
In my installation I show it going from this:

def exception_to_str(s = None):

    sh = StringIO.StringIO()
    if s is not None: print >>sh, s
    traceback.print_exc(file=sh)
    return sh.getvalue()

to this:

def exception_to_str(s=None):

    sh = io.StringIO()
    if s is not None:
        print(s, file=sh)
    traceback.print_exc(file=sh)
    return sh.getvalue()

At first glance, the change seems innocuous enough, but I think it
introduced an error.  (It appears that mpl 1.2 is supposed to work on
Python 2.7 and 3.x.) From a thread I started on comp.lang.python
(http://thread.gmane.org/gmane.comp.python.general/733938), it appears
that io.StringIO instances only accept Unicode strings as input.
Unless v 1.2 is only supposed to run on Python 3 (that doesn't seem to
be the case), you need to do something to convert the traceback
module's output to Unicode before feeding to the io.StringIO object.

Here's a simple demonstration of the problem:

% python2.7
Python 2.7.5+ (2.7:93eb15779050, May 30 2013, 15:27:39)
[GCC 4.4.6 [TWW]] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import traceback, StringIO, io
>>> s1 = StringIO.StringIO()
>>> traceback.print_stack(file=s1)
>>> print repr(s1.getvalue())
'  File "<stdin>", line 1, in <module>\n'
>>>
>>> s2 = io.StringIO()
>>> traceback.print_stack(file=s2)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/skipm/x86_64-linux3.1/lib/python2.7/traceback.py", line
269, in print_stack
    print_list(extract_stack(f, limit), file)
  File "/home/skipm/x86_64-linux3.1/lib/python2.7/traceback.py", line
23, in print_list
    '  File "%s", line %d, in %s' % (filename,lineno,name))
  File "/home/skipm/x86_64-linux3.1/lib/python2.7/traceback.py", line
13, in _print
    file.write(str+terminator)
TypeError: unicode argument expected, got 'str'

Skip Montanaro
sk...@po...

Thank you both Paul and Eric the kind helping hands,
Sudheer

Hi,

A friend was just asking me about how to set grid style in matplotlibrc
to separate settings for minor and major grids.
As far as I understand, it's not possible because the rc file only
includes the following options :

grid.color, grid.linestyle and grid.linewidth

Would it make sense to add also grid.major.* and grid.minor.* (as it
already exists for xticks) ?

best,
Pierre

Sorry if this question was already discussed. I though it was, but a few
Google searches didn't point me to relevant content.

On 2013/05/30 3:42 PM, Paul Hobson wrote:
>
>
>
> On Thu, May 30, 2013 at 6:28 PM, Sudheer Joseph
> <sud...@ya... <mailto:sud...@ya...>> wrote:
>
>     Dear Users,
>                      Is there a way to set font size of error bar plot
>     axis? I tried below one but get error that "'ErrorbarContainer'
>     object has no attribute 'xaxis'"
>     any help??
>

Paul is correct ("plt.tick_params(labelsize=14)"), but in addition, the 
error you are making is that errorbar does not return an Axes.  To get a 
reference to the Axes you could follow the call to plt.errorbar() with 
"ax = plt.gca()".

>     ax=plt.errorbar(y,x,err,label='STDV')
>     plt.xlim(0,110)
>     for tick in ax.xaxis.get_major_ticks():
>                      tick.label.set_fontsize(14)
>
>
> Use ax.tick_params
> (http://matplotlib.org/api/axes_api.html?highlight=tick_params#matplotlib.axes.Axes.tick_params).
>
> Hope that helps,
> -paul
>
>
>
> ------------------------------------------------------------------------------
> Get 100% visibility into Java/.NET code with AppDynamics Lite
> It's a free troubleshooting tool designed for production
> Get down to code-level detail for bottlenecks, with <2% overhead.
> Download for free and get started troubleshooting in minutes.
> http://p.sf.net/sfu/appdyn_d2d_ap2
>
>
>
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>

On Thu, May 30, 2013 at 6:28 PM, Sudheer Joseph <sud...@ya...>wrote:

> Dear Users,
>                 Is there a way to set font size of error bar plot axis? I
> tried below one but get error that "'ErrorbarContainer' object has no
> attribute 'xaxis'"
> any help??
>
> ax=plt.errorbar(y,x,err,label='STDV')
> plt.xlim(0,110)
> for tick in ax.xaxis.get_major_ticks():
>                 tick.label.set_fontsize(14)
>
>
Use ax.tick_params (
http://matplotlib.org/api/axes_api.html?highlight=tick_params#matplotlib.axes.Axes.tick_params
).

Hope that helps,
-paul

Dear Users,
                Is there a way to set font size of error bar plot axis? I tried below one but get error that "'ErrorbarContainer' object has no attribute 'xaxis'"
any help??

ax=plt.errorbar(y,x,err,label='STDV')
plt.xlim(0,110)
for tick in ax.xaxis.get_major_ticks():
                tick.label.set_fontsize(14)

 
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