bigcity.py

import sys, pywikibot
from pywikibot import pagegenerators

pywikibot.handle_args(sys.argv[1:])
site = pywikibot.Site('wikidata', 'wikidata')
repo = site.data_repository()

query = 'SELECT ?item ?population WHERE{ ?item wdt:P31 wd:Q515 . ?item wdt:P1082 ?population . FILTER (?population > 100000) MINUS { ?item wdt:P31 wd:Q1549591 }} ORDER BY DESC(?population)'

generator = pagegenerators.WikidataSPARQLPageGenerator(query, site=site)

for item in generator:
    claim = pywikibot.Claim(repo, 'P31')
    target = pywikibot.ItemPage(repo, 'Q1549591')
    claim.setTarget(target)
    item.addClaim(claim)

This bot can't be simulated see:
https://phabricator.wikimedia.org/T76694