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Python3 Func Slice

📅 2026-06-23 | 📂 Python3
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404 NOT FOUND!

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The 404 page is an essential part of any website, carrying the responsibility of user experience and SEO optimization. A 404 page usually appears when users visit pages on the site that do not exist or have been deleted, returning a server error code 404. If the webmaster does not set up a 404 page, dead links will appear, which can hinder search engine indexing when spiders crawl such URLs.

Origin of 404 Not Found

Legend has it that before the Third Industrial Revolution, the form of the internet was one large central database located in Room 404. At that time, all requests were manually completed by humans. If the requested file could not be found in the database, or if the requester had written the wrong file number, the user would receive a return message: room 404 : file not found. After the rise of the internet, people became accustomed to using 404 as the error code for a server failing to find a file. Of course, actual verification shows that the legendary Room 404 never existed.

Two Major Benefits of Setting Up a 404 Page

  • Guide users not to close the website, enhancing user experience.
  • Prevent the appearance of dead links on the website.

See more about HTTP status codes introduction.

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