I am using pywikibot in python to get all revisions of a Wikipedia page.
import pywikibot as pw
wikiPage='Narthaki'
page = pw.Page(pw.Site('en'), wikiPage)
revs = page.revisions(content=True)
How do I know which of the revisions were reverts? I see from https://xtools.wmflabs.org/articleinfo/en.wikipedia.org/Narthaki that the page has one revert edit. Not sure how to get more information about this from the revision object.
Request your help. Many thanks!
"Revert" is not a well-defined concept so it depends on how you define it. (See https://phabricator.wikimedia.org/T152434 for some relevant discussion.) The most capable revert detection tool today is probably mwrevert.
You can compare text of revision directly, or look for the revisions that have the same sha1 hash:
>>> rev = next(revs)
>>> rev.sha1
'1b02fc4cbcfd1298770b16f85afe0224fad4b3ca'
If two revision have the same text/hash it means that the newer one is a revert to the older one. Of-course there are some special cases like sha1hidden, or how to handle multiple reverts to the same revision that one needs to consider.