Hi Nick and all other Python ideas friends, yes, you are right. There is not much difference between PEP-501 or my proposal. One argument why I would like to prefer backticks: Some IDEs detect that you want to use a f-string automatically: You type: name = 'Peter' print('Hello {name... and the IDE automatically adds the missing "f" in front of the string: name = 'Peter' print(f'Hello {name... This is a handy feature (of PyCharm), which would not work reliably if there are two different prefixes. ------- You mentioned these things: eager rendering: I think deferred rendering would increase the complexity a lot. And I think it is not needed. runtime value interpolation: It is up to the receiver of types.InterpolationTemplate to handle the data structure. dedicated templating libraries: One temp after the other. I think HTML and SQL libraries would adapt as soon as the foundation is available. I would be happy if PEP-501 would come true. Regards, Thomas Güttler Am So., 27. Juni 2021 um 06:45 Uhr schrieb Nick Coghlan <ncoghlan@gmail.com
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Stephen J. Turnbull wrote:
But a PEP 501 i-string "just works" nicely: load_warning = i'Load is too high: {load}' while (theres_work_to_do_matey): if load > max_load: logging.warn(load_warning) (This assumes a future version of logging.warn that calls str() on the first argument if it is an InterpolationTemplate.)
A "Why this rather than PEP 501's interpolation templates?" is the main thing I was looking for in the PEP and I didn't find it.
If the proposal is just a variant on PEP 501 with the syntax changed from i"template" to \`template\` and the template type name changed from InterpolationTemplate to TemplateLiteral, it doesn't need to be a new PEP, I can just explicitly reject those spelling options in PEP 501. (The reasons for that PEP's deferral unfortunately still hold, though - eager rendering, runtime value interpolation, and dedicated templating libraries together cover enough cases that the motivation for introducing the semantic complexity of yet another templating option gets weakened dramatically).
If the differences between the proposals run deeper than that, then the proposed new PEP needs to spell them out. _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-leave@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/XSGJO3... Code of Conduct: http://python.org/psf/codeofconduct/