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Merged
hauntsaninja merged 8 commits into from
Dec 24, 2022
Merged

gh-100428: Make float documentation more accurate #100437

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50807c3
gh-100428: Make float documentation more accurate
hauntsaninja Dec 22, 2022
78e38a8
remove empty lines
hauntsaninja Dec 22, 2022
b0714b2
reflow text
hauntsaninja Dec 23, 2022
d655fae
reorder based on dependence
hauntsaninja Dec 24, 2022
10d5c0d
match the names from lexical analysis a little better
hauntsaninja Dec 24, 2022
01c25f2
improve "conform to the following grammar"
hauntsaninja Dec 24, 2022
11ffd4d
specify digit is unicode nd
hauntsaninja Dec 24, 2022
6f0c699
tinker with the name
hauntsaninja Dec 24, 2022
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gh-100428: Make float documentation more accurate 
Previously, the grammar did not accept `float("10")`.
Also implement mdickinson's suggestion of removing the indirection.
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@hauntsaninja
hauntsaninja committed Dec 22, 2022
commit 50807c3b99f3847a51a512745aa7ce35a6c719d7
11 changes: 8 additions & 3 deletions Doc/library/functions.rst
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Expand Up @@ -657,11 +657,16 @@ are always available. They are listed here in alphabetical order.
sign: "+" | "-"
infinity: "Infinity" | "inf"
nan: "nan"
numeric_value: `floatnumber` | `infinity` | `nan`

number: floatnumber [`exponent`]
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floatnumber: [`digitpart`] "." `digitpart` | `digitpart` ["."]
digitpart: `digit` (["_"] `digit`)*
exponent: ("e" | "E") ["+" | "-"] `digitpart`

numeric_value: `number` | `infinity` | `nan`
numeric_string: [`sign`] `numeric_value`

Here ``floatnumber`` is the form of a Python floating-point literal,
described in :ref:`floating`. Case is not significant, so, for example,
Case is not significant, so, for example,
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"inf", "Inf", "INFINITY", and "iNfINity" are all acceptable spellings for
positive infinity.

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