Positional-only and keyword-only arguments in Python

Published: 28 March 2022
on channel: mCoding

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Make function args positional or keyword-only.

In Python, it's possible to force a function argument to be positional-only or keyword-only. In this video, we see the syntax for doing this, as well as see some examples and reasons for why you might want to actually make a parameter positional-only or keyword-only.

Note: positional-only arguments are a Python 3.8+ feature. Keyword-only are Python 3.0+.

Errata:
1. At 1:22 you'll get a TypeError, not a SyntaxError.

― mCoding with James Murphy (https://mcoding.io)

Source code: https://github.com/mCodingLLC/VideosS...
Positional-only PEP: https://peps.python.org/pep-0570/
Keyword-only PEP: https://peps.python.org/pep-3102/

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CHAPTERS
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0:00 Intro
1:08 Keyword-only arguments
4:50 Positional-only arguments
7:45 Uncommon to use both
8:29 Speed test, position args are faster