gh-85583: Add overview of formatted string literals (f-strings) to str
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Co-authored-by: Ezio Melotti <[email protected]> Originally-authored-by: [email protected]
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Also more links to other pages? e.g. lexical analysis
(Should the title not be "...to stdtypes"?)
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@skirpichev I'd like to merge this soon, I saw you requested a review. Do you have any comments? A |
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| .. versionadded:: 3.6 | ||
| .. versionchanged:: 3.7 | ||
| The :keyword:`await` and :keyword:`async for` can be used in expressions |
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| The :keyword:`await` and :keyword:`async for` can be used in expressions | |
| :keyword:`await` and :keyword:`async for` can be used in expressions |
Either remove it or make it longer, IMO shorter is better.
| Many restrictions on expressions within f-strings have been removed. | ||
| Notably, nested strings, comments, and backslashes are now permitted. | ||
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| An :dfn:`f-string` (formally a :dfn:`formatted string literal`) is |
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| An :dfn:`f-string` (formally a :dfn:`formatted string literal`) is | |
| An :dfn:`f-string` (:dfn:`formatted string literal`) is |
Is it more formal? f-string is pretty much an abbreviation.
| >>> f'{{x}} is {x}' | ||
| '{x} is 42' | ||
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| Functions can also be used, and :ref:`format specifier <formatstrings>`: |
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| Functions can also be used, and :ref:`format specifier <formatstrings>`: | |
| Functions can also be used, and :ref:`format specifiers <formatstrings>`: |
Grammar
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| While debugging it may be helpful to see both the expression and its value, | ||
| using the equals sign (``=``) after the expression. |
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| While debugging it may be helpful to see both the expression and its value, | |
| using the equals sign (``=``) after the expression. | |
| While debugging it may be helpful to see both the expression and its value | |
| by using the equals sign (``=``) after the expression. |
| using the equals sign (``=``) after the expression. | ||
| This preserves spaces within the brackets, and can be used with a converter. | ||
| By default, the debugging operator uses the :func:`repr` (``!r``) conversion. | ||
| For example: |
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Do we really need the "For example:" every time? Looking at the file it has mixed usage.
skirpichev
approved these changes
Apr 21, 2025
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Replaces #21552.
📚 Documentation preview 📚: https://cpython-previews--132689.org.readthedocs.build/en/132689/library/stdtypes.html#formatted-string-literals-f-strings