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Written by Ned Batchelder on 2025-01-13 at 13:49

Comparison operators in #Python can be chained together, but using them that way could be controversial. I wrote this this other day:

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Written by Eric Matthes on 2025-01-13 at 13:50

@nedbat I'm a big fan of parentheses for clarity, even when they're technically not needed.

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Written by Ned Batchelder on 2025-01-13 at 13:53

@ehmatthes But parentheses would break the comparison here.

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Written by Eric Matthes on 2025-01-13 at 13:54

@nedbat 🤦‍♂️

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Written by Sybren Stüvel 🧡🤍 on 2025-01-13 at 13:51

@nedbat I like how ... is actually a usable value in Python, so the code as you wrote it is literally runnable as well.

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Written by O'Schell on 2025-01-13 at 14:12

@sybren @nedbat ... or ... ? If it's the first one, can you develop more ?

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Written by Ned Batchelder on 2025-01-13 at 14:22

@OSchell @sybren The Unicode ellipsis is not a valid identifier :(

… = 1

File "", line 1

… = 1

^

SyntaxError: invalid character '…' (U+2026)

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Written by Sybren Stüvel 🧡🤍 on 2025-01-13 at 22:11

@nedbat @OSchell that's a shame. Well, at least we do have the ASCII ellipsis.

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Written by Tin Tvrtković on 2025-01-13 at 13:57

@nedbat a little too clever for my tastes

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Written by Jonathan Hartley on 2025-01-13 at 14:02

@tintvrtkovic @nedbat the counter argument would be that the chaining of these operators is precisely the same as chaining inequalities in my sixth grader's math homework. I think they are unintuitive only when one still has a "thinking in C" sort of mindset, where this would be impossible.

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Written by Tin Tvrtković on 2025-01-13 at 21:49

@tartley @nedbat No, I get it. But it also looks like