* gh-99880: document rounding mode for new-style formatting
The CPython uses _Py_dg_dtoa(), which does rounding to nearest with half
to even tie-breaking rule.
If that functions is unavailable, PyOS_double_to_string() fallbacks to
system snprintf(). Since CPython 3.12, build requirements include C11
compiler *and* support for IEEE 754 floating point numbers (Annex F).
This means that FE_TONEAREST macro is available and, per default,
printf-like functions should use same rounding mode as _Py_dg_dtoa().
* Update Doc/library/string.rst
Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
---------
Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
If an HTTP link is redirected to a same looking HTTPS link, the latter can
be used directly without changes in readability and behavior.
It protects from a men-in-the-middle attack.
This change does not affect Python examples.
* `precision` field is a decimal integer
* clarify that stated limitations are on presentation type
rather than input value type. Especially misleading is
"precision is not allowed for integer values", since integer
value input to a format like `.1f` is fine.
* regarding max field size, replace "non-number" with "string",
which is the only non-numeric presentation type
Automerge-Triggered-By: GH:ericvsmith
Add `string.Template.get_identifiers()` method that returns the identifiers within the template. By default, raises an error if it encounters an invalid identifier (like `substitute()`). The keyword-only argument `raise_on_invalid` can be set to `False` to ignore invalid identifiers (like `safe_substitute()`).
Automerge-Triggered-By: GH:warsaw
* Improve description of 'e', 'f' and 'g' presentation types
* Drop the 'E' from Scientific 'E' notation; remove >= 0 qualifications
* Fix false statement that the alternate form is valid for Decimal
* Nitpick: remove the Harvard/Oxford comma
* Add note that the decimal point is also removed if no digits follow it, except in alternate form
Use an unique identifier for the different grammars documented using
the Sphinx productionlist markup.
productionlist markups of the same grammar, like "expressions" or
"compound statements", use the same identifier "python-grammar".
Sphinx 3 disallows having more than one productionlist markup with
the same name. Simply remove names in this case, since names are not
shown anyway. For example, fix the Sphinx 3 warning:
Doc/reference/introduction.rst:96: duplicate token description
of *:name, other instance in reference/expressions
Make the definition of the width more explicit that it includes any
extra signs added by other options.
https://bugs.python.org/issue38657
Automerge-Triggered-By: @Mariatta
* bpo-34273: Change 'Fixed point' to 'Fixed-point notation'.
The change in the mini language floating point and decimal table
is consistent with 'Exponential notation' and clarifies that we
are referring to the output notation, not an object type.
* Update string.rst
* Update string.rst
* Update string.rst
* Update string.rst
string.Formatter auto-numbering feature was added in 3.4 and there
is no versionchanged note in its documentation, making the documentation
ambiguous about which version the feature is available.
Pattern `[a-z]` with `IGNORECASE` flag can match to some non-ASCII characters.
Straightforward solution for this is using `IGNORECASE | ASCII` flag.
But users may subclass `Template` and override only `idpattern`. So we want to
avoid changing `Template.flags`.
So this commit uses local flag `-i` for `idpattern` and change `[a-z]` to `[a-zA-Z]`.
* bpo-1198569: Allow the braced pattern to be different
``string.Template`` subclasses can optionally define ``braceidpattern`` if
they want to specify different placeholder patterns inside and outside the
braces. If None (the default) it falls back to ``idpattern``.
Sergey B Kirpichev
Serhiy Storchaka
Ned Batchelder
William Andrea
Ezio Melotti
achhina
yuki
Petr Viktorin
Mariatta Wijaya
John Belmonte
Ben Kehoe
Tal Einat
Irit Katriel
Mark Dickinson
Victor Stinner
Terry Jan Reedy
Pete Wicken
bchhabra2490
Brennan D Baraban
Krishna Oza
Andre Delfino
Xiang Zhang
nathankerr96
Barry Warsaw
INADA Naoki
Eric V. Smith