For English Wikisource, I have a series of 63 volumes of the "Dictionary of National Biography" that have now been transcribed. These works have many internal cross reference links, which we have been generating, however, in the 16 years that the volumes were originally constructed, some of the articles that were planned to be written were not, so they have ended up being red links. I wish to identify these red links

I am trying work out how to use pywikibot to generate a list of the pages with red links. To get a list of pages to feed through is easy, as each page is linked to an index page per volume, so it would be a namespace collection from a central page, all based around {{PAGENAME}}.