Matplotlib hangs due to numpy.ma.power()

Community matplotlib-users
1

Can you provide a reproducible example? There is not really enough here to sort out what is going wrong or why it is going wrong. Ideally the example should be self contained (code + synthetic data).

What versions of mpl + numpy + python are you using everywhere?

Tom

···

On Fri Nov 14 2014 at 7:25:15 AM Torsten Bronger <bronger@…669…> wrote:

Hallöchen!

I’ve had a very odd observation today: I call matplotlib 1.3.1 from

Django 1.7 code running on Apache under Ubuntu 14.04. The relevant

code is:

figure = Figure(frameon=False, figsize=(4, 3))

canvas = FigureCanvasAgg(figure)

axes = figure.add_subplot(111)

...

canvas.print_figure(plot_filepath)

The last command hangs.

Funny enough, if I run the very same code on Django’s testserver, it

works.

First, I thought of http://stackoverflow.com/questions/22337250 but

this is not the case here. I’ve really assured that “Agg” is used,

also by providing a proper config file.

The oddest part is, if I replace in matplotlib/scale.py, line 136,

    return ma.power(10.0, a) / 10.0

with

    return np.power(10.0, a) / 10.0

it works!

Can anybody explain this?

Regards,

Torsten.

–

Torsten Bronger Jabber ID: torsten.bronger@…4597…aachen.de

                              or [http://bronger-jmp.appspot.com](http://bronger-jmp.appspot.com)

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