Help:Regular expressions

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A regular expression (regex) is a sequence of characters defining a search pattern. On the wiki, they are commonly used for finding and replacing text through Special:ReplaceText (staff only), AutoWikiBrowser, Pywikibot, or Scribunto/Lua modules.

Each tool/programming language uses its own ruleset for regular expressions:

If you need help with regular expressions, you may post on the talk page, or join the Nookipedia Discord and ask in the #wiki-tech channel.


There are several online tools to test our patterns. A small selection is listed below.


Below is a list of examples of regular expressions that may help you on the wiki. Feel free to expand this list.

  • Matching a multi-line Foreignname template and adding a new "See also" section after it (Python):
Find: {{Foreignname([\s\S]*?\n}})
Replace: {Foreignname\1\n\n==See also==