The PNG writer in matplotlib doesn't support writing of extended metadata. However, it may be less useful anyway, as while you can put arbitrary key/value pairs in a PNG file, I don't believe there's any standards for what the keys should be, so there aren't many tools that use it. (If I'm just not able to find it, point it out to me...) By contrast, many of the metadata fields in PDF are standardized so content management systems etc. do take advantage of them.
Mike Marius Jan Klein wrote: > Thanks for your help concerning the pdf files! It was exactly what I was > looking for. Is there anything similar for png-files? > > > > >> Marius Jan Klein <mjk...@ny...> writes: >> >> >>> I want to edit the metadata of pdf- or png-files when creating one of >>> these files. I do not want to use for example Pypdf because then >>> Python must read the file first before it can be edited. >>> > > > > >> Jouni K. Seppänen <j...@ik...> writes: >> >> Now there is (in the trunk, revision 7964), via the PdfPages mechanism: >> >> >from matplotlib.backends.backend_pdf import PdfPages >> >from pylab import * >> >>> pdf = PdfPages('testing.pdf') >>> plot([3,1,4]) >>> pdf.savefig() >>> d = pdf.infodict() >>> d['Title'] = 'Testing' >>> d['Author'] = u'Jouni K. Sepp\xe4nen' >>> pdf.close() >>> > > ------------------------------------------------------------------------------ > Join us December 9, 2009 for the Red Hat Virtual Experience, > a free event focused on virtualization and cloud computing. > Attend in-depth sessions from your desk. Your couch. Anywhere. > http://p.sf.net/sfu/redhat-sfdev2dev > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA ------------------------------------------------------------------------------ Join us December 9, 2009 for the Red Hat Virtual Experience, a free event focused on virtualization and cloud computing. Attend in-depth sessions from your desk. Your couch. Anywhere. http://p.sf.net/sfu/redhat-sfdev2dev _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users