[Python-ideas] Re: Revisiting a frozenset display literal

[Rob Cliffe via Python-ideas]

How about
    fs{1, 2, 3}
?
Best wishes
Rob Cliffe

On 16/01/2022 12:41, Chris Angelico wrote:

On Sun, Jan 16, 2022 at 11:18 PM Steven D'Aprano <st...@pearwood.info> wrote:

On Sun, Jan 16, 2022 at 09:18:40PM +1100, Chris Angelico wrote:

While it's tempting, it does create an awkward distinction.

f(1, 2, 3) # look up f, call it with parameters
f[1, 2, 3] # look up f, subscript it with paramters
f{1, 2, 3} # construct a frozenset

You forgot

     f"1, 2, {x+1}"  # eval some code and construct a string

Not to mention:

     r(1, 2, 3)  # look up r, call it with parameters
     r[1, 2, 3]  # look up r, subscript it
     r"1, 2, 3"  # a string literal

Strings behave differently in many many ways. Are there any non-string
types that differ?

Reading this makes my eyes bleed:

     >>> <1, 2, 3> < <1, 2, 3, 4>
     True

Fair point, but I can't imagine people comparing two literals like
that. It's not quite as bad if you replace the left side with a
variable or calculation, though it's still kinda weird.

Unfortunately there aren't many symbols available, and Python's kinda
locked into a habit of using just one at each end (rather than, say,
(<1, 2, 3>) or something), so choices are quite limited.

Triple quoted strings say hello :-)

See above, strings are different, and people treat them differently.

{{1, 2, 3}} would work, since that's currently a runtime error. But I
prefer the f{} syntax.

Yeah, I think that ship has sailed. Double punctuation just isn't
Python's thing, so there aren't really any good ways to shoehorn more
data types into fewer symbols.

ChrisA
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