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Written by Alex Willmer on 2024-12-17 at 14:09

[#]TIL to use a dict-comprehension in an f-string add parens or whitespace #Python

d = {'a': 1, 'b': 2, 'c': 3, 'd': 5, 'e': 6}

f"{({k: v for k, v in d.items() if v % 2})}"

"{'a': 1, 'c': 3, 'd': 5}"

f"{ {k: v for k, v in d.items() if v % 2} }"

"{'a': 1, 'c': 3, 'd': 5}"

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Written by Peter Drake on 2024-12-17 at 14:41

@alex Good to know.

Having whitespace matter feels un-Pythonic. Is there some other use for double curly braces?

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Toot

Written by Alex Willmer on 2024-12-17 at 15:17

@peterdrake in an f-string double curly braces produce a single brace, e.g. f'{{foo}}' -> '{foo}'

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