ns parameter of Page object and/or defaultnamespace of Link object should force the Namespace instead of add a Namespace if no one is given.
Especially for categories but also for other namespaces it is possible to name pages which looks like a Namespace e.g. "Kategory:Wikipedia:Hilfe".
site = pywikibot.Site()
pywikibot.Category(pywikibot.Link("Wikipedia:Hilfe"), defaultNamespace=14) or
pywikibot.Category(site, "Wikipedia:Hilfe", ns=14)
fails with an exception error
pywikibot.Page(site, "Wikipedia:Hilfe", ns=14) gives
Page("Wikipedia:Hilfe") instead of the category page as expected.
There are several scripts which fix that point by adding a "category:" in front of a page title which should be obsolete.
See https://gerrit.wikimedia.org/r/#/c/132781/ for example
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**Version**: core-(2.0)
**Severity**: normal