[Matplotlib-users] mplcairo multipage pdf and too many figures open

[Neal Becker]

Thanks! I rarely use this single line form of 'if' and screwed it up.

On Fri, Aug 16, 2019 at 7:25 AM Joshua Klein <mobiusklein at gmail.com> wrote:
>
> `pdf.savefig` returns None (it has no explicit return value), which is a False-y value. This causes the `and` expression to short-circuit and the right-hand-side expression is never evaluated. You'll need to call them separately.
>
> On Fri, Aug 16, 2019 at 7:17 AM Neal Becker <ndbecker2 at gmail.com> wrote:
>>
>> I recoded as:
>>
>>     if pdf: pdf.savefig (fig) and plt.close(fig)
>>
>> And I still get the same warning message.
>>
>> On Fri, Aug 16, 2019 at 4:46 AM Antony Lee
>> <antony.lee at institutoptique.fr> wrote:
>> >
>> > Hi,
>> > You can probably either call plt.close(fig) after savefig to close the figure (likely best), or adjust rcParams["figure.max_open_warning"] to a large enough number (at the risk of running out of memory).
>> > Antony
>> >
>> > On Fri, Aug 16, 2019 at 12:44 AM Neal Becker <ndbecker2 at gmail.com> wrote:
>> >>
>> >> I've been using mplcairo multipage pdf.  The pattern I use is:
>> >>
>> >> from mplcairo.multipage import MultiPage
>> >> cm = MultiPage(ap_args.output)
>> >>
>> >> with cm as pdf:
>> >>   fig,ax = plt.subplots()
>> >>   do something
>> >>   pdf.savefig(fig)
>> >>
>> >>   fig2,ax2 = plt.subplots()
>> >>   do something
>> >>   pdf.savefig(fig2)
>> >> ...
>> >>
>> >> after 20 figures:
>> >> RuntimeWarning: More than 20 figures have been opened. Figures created
>> >> through the pyplot interface (`matplotlib.pyplot.figure`) are retained until
>> >> explicitly closed and may consume too much memory. (To control this warning,
>> >> see the rcParam `figure.max_open_warning`).
>> >>
>> >> What is the proper way to use mplcairo.multipage to avoid this issue?
>> >>
>> >> Thanks,
>> >> Neal
>> >>
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>>
>>
>>
>> --
>> Those who don't understand recursion are doomed to repeat it
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-- 
Those who don't understand recursion are doomed to repeat it