The ellipsis also has this function in the useful `click and `typer` libraries to build CLIs.

…ibrary that I wrote an article about recently concerning its use in handling environment variables. There, the Ellipsis can be used as the first argument for the so-called Field-function to specify that an attribute is required. For example:
Hidden Gems In Python: Lesser-Known Tips & Tricks —  Part 1
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Jacob Ferus
Tom Ritchford
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May 23, 2023
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The ellipsis also has this function in the useful `click and `typer` libraries to build CLIs.
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Written by Tom Ritchford1.5K Followers
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