Show HN: Pattern matching and guards for Python functions (opens in new tab)

(github.com)

6 pointsrasguanabana10y ago4 comments

4 comments

4 comments · 1 top-level

creshal10y ago· 3 in thread

Example suggestion: Ensuring that an argument is a list of strings. I can't be the only one who wasted hours of debugging because I accidentally fed a string to a function expecting a list of strings.

rasguanabanaOP10y ago

Thank you for suggestion, I have added a simple example.

guan10y ago

Can I use the generics introduced with the new type annotations in Python 3.5, so I can refer to Sequence[str] or something like that?

creshal10y ago

The problem is that every string is, internally, also a sequence of (single-character) strings. So it's not that easy.

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