On Wed, Sep 23, 2009 at 10:48 AM, Jouni K. Seppänen <j...@iki.fi> wrote:
> Andrew Straw <straw...@astraw.com> writes:
>
>> Jouni - I don't think this would be hard to add, but I'm swamped at
>> work. If this is an itch you'd like to scratch, feel free to hack away
>> on the image_comparison() function in
>> lib/matplotlib/testing/decorators.py -- it's a pretty straightforward
>> piece of code.
>
> Changing that is probably easy enough, but how should the overall code
> path look?
>
> I was planning to switch backends in matplotlib.test after it runs the
> Agg tests, so that the same test cases could be used to produce pdf
> files (that's why they save files without extensions, right?) but this
> seems to be impossible. The matplotlib.use function is a no-op if
> matplotlib.backends has been imported, regardless of the warn argument.
> For example, the following code produces two png files:
>
> #!/usr/bin/env python
> import matplotlib
>
> matplotlib.use('agg')
> from matplotlib import pyplot
> pyplot.plot([3,1,4,1])
> pyplot.savefig('foo1')
Take a look at the pyplot "switch_backends" function.
Alternatively, agg knows how to save pdf if given the extension, so we
could wire up the testing to use a module level extension set
somewhere which could be updated for each backend. This is probably
safer and cleaner than switch_backends
JDH
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