Re: [matplotlib-devel] Comparing pdf output in tests

[Jouni K. S. <jk...@ik...>]

John Hunter <jd...@gm...> writes:

>>    pyplot.savefig('foo1')
>
> Take a look at the pyplot "switch_backends" function.

Yes, that function was on the next line after the part you quoted. :-)
It calls matplotlib.use with warn=False, but that function ends up doing
nothing.

> 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

That sounds complicated. How about having the test cases call savefig
with all the relevant file formats? That doesn't look so nice if the
test cases end up with a big block of savefig calls, but it has the
advantage that there is no magic involved and it is very obvious what is
going on.

-- 
Jouni K. Seppänen
http://www.iki.fi/jks