Thanks Mitesh I thought it might be along those lines. I have tried calling plt.close() just before I return from the plot creation function, but still get the same error.
Do you perhaps have a simple code example I can try and follow? (I am already using the io module for the image storage.) Derek On Sunday, 18 January 2015 16:05:45 UTC+2, mitesh_django wrote: > > Hi Derek, > > I face same issue few months ago, what I did is I destroyed plot object > completely everytime the view is called and regenerated new plot everytime. > You can try that. There is an issue with matplotlib memory, which basically > usage same plot. > > Another solution could be try different cStringIO to store base64 encoded > image data, send that as response and at browser using javascript ( > data:image/png;base64). > > > > Thanks, > With Best Regards, > > Mitesh Patel > > Senior Product Engineer > > Mobile: +91-9970 8575 39 > Email: [email protected] <javascript:> > LinkedIn : http://in.linkedin.com/in/miteshpatel11 > > > On 18 January 2015 at 19:23, Derek <[email protected] <javascript:>> > wrote: > >> I have a situation which is puzzling. >> >> I have a web page that, when generated embeds links that look like: >> >> </div><img src="/analysis/design/chart?field=A></div> >> </div><img src="/analysis/design/chart?field=B></div> >> </div><img src="/analysis/design/chart?field=C></div> >> >> Each of these links points to a view that, when activated, creates a >> small PNG image (matplotlib is used for this) which is returned via an >> InMemoryUploadedFile object. >> >> The basic logic and image construction works - if each of these links is >> called directly from the browser, then each is created perfectly. >> >> However, when embedded in a single page (as above) then only one single >> image is returned and the rest generate a similar error: >> >> File >> "/home/gamesbook/.virtualenvs/dev/local/lib/python2.7/site-packages/matplotlib/pyplot.py", >> >> line 1401, in xlabel >> l = gca().set_xlabel(s, *args, **kwargs) >> File >> "/home/gamesbook/.virtualenvs/dev/local/lib/python2.7/site-packages/matplotlib/pyplot.py", >> >> line 803, in gca >> ax = gcf().gca(**kwargs) >> File >> "/home/gamesbook/.virtualenvs/dev/local/lib/python2.7/site-packages/matplotlib/figure.py", >> >> line 1221, in gca >> return self.add_subplot(1, 1, 1, **kwargs) >> File >> "/home/gamesbook/.virtualenvs/dev/local/lib/python2.7/site-packages/matplotlib/figure.py", >> >> line 916, in add_subplot >> self._axstack.add(key, a) >> File >> "/home/gamesbook/.virtualenvs/dev/local/lib/python2.7/site-packages/matplotlib/figure.py", >> >> line 120, in add >> Stack.remove(self, (key, a_existing)) >> File >> "/home/gamesbook/.virtualenvs/dev/local/lib/python2.7/site-packages/matplotlib/cbook.py", >> >> line 1343, in remove >> raise ValueError('Unknown element o') >> ValueError: Unknown element o >> >> I have googled for this error, but it seems fairly obscure and I am not >> sure how it relates to my situation. >> >> Any insights welcome! >> >> Thanks >> Derek >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Django users" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> To post to this group, send email to [email protected] >> <javascript:>. >> Visit this group at http://groups.google.com/group/django-users. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/django-users/CAF1Wu3OfN9rmUKTDO%2BT%3DJan%3DF%3DLKODqQObds-tvME%3DUhL18fMw%40mail.gmail.com >> >> <https://groups.google.com/d/msgid/django-users/CAF1Wu3OfN9rmUKTDO%2BT%3DJan%3DF%3DLKODqQObds-tvME%3DUhL18fMw%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > > -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/9c70be64-efdf-4bef-ba3d-e93dad32bc23%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
