Can matplotlib add metadata to saved figures?

Question

I want to be able to ascertain the provenance of the figures I create using matplotlib, i.e. to know which version of my code and data created these figures. (See this essay for

Answer 1

If you are interested in PDF files, then you can have a look at the matplotlib module matplotlib.backends.backend_pdf. At this link there is a nice example of its usage, which could be "condensed" into the following:

import pylab as pl
import numpy as np
from matplotlib.backends.backend_pdf import PdfPages

pdffig = PdfPages('figure.pdf')

x=np.arange(10)

pl.plot(x)
pl.savefig(pdffig, format="pdf")

metadata = pdffig.infodict()
metadata['Title'] = 'Example'
metadata['Author'] = 'Pluto'
metadata['Subject'] = 'How to add metadata to a PDF file within matplotlib'
metadata['Keywords'] = 'PdfPages example'

pdffig.close()