Prefer LC_MONETARY when formatting currency

akx · afh · akx · commit 90d6d4c4a5d3 · 2025-01-14T17:17:28.000+02:00
Co-authored-by: Alexis Hildebrandt &lt;afh@surryhill.net&gt;
diff --git a/babel/numbers.py b/babel/numbers.py
@@ -7,7 +7,8 @@
     The default locale for the functions in this module is determined by the
     following environment variables, in that order:
 
-     * ``LC_NUMERIC``,
+     * ``LC_MONETARY`` for currency related functions,
+     * ``LC_NUMERIC``, and
      * ``LC_ALL``, and
      * ``LANG``
 
@@ -31,6 +32,7 @@
 if TYPE_CHECKING:
     from typing_extensions import Literal
 
+LC_MONETARY = default_locale(('LC_MONETARY', 'LC_NUMERIC'))
 LC_NUMERIC = default_locale('LC_NUMERIC')
 
 
@@ -120,9 +122,10 @@ def get_currency_name(
     :param currency: the currency code.
     :param count: the optional count.  If provided the currency name
                   will be pluralized to that number if possible.
-    :param locale: the `Locale` object or locale identifier. Defaults to the system numeric locale.
+    :param locale: the `Locale` object or locale identifier.
+                   Defaults to the system currency locale or numeric locale.
     """
-    loc = Locale.parse(locale or LC_NUMERIC)
+    loc = Locale.parse(locale or LC_MONETARY)
     if count is not None:
         try:
             plural_form = loc.plural_form(count)
@@ -145,9 +148,10 @@ def get_currency_symbol(currency: str, locale: Locale | str | None = None) -> st
     u'$'
 
     :param currency: the currency code.
-    :param locale: the `Locale` object or locale identifier. Defaults to the system numeric locale.
+    :param locale: the `Locale` object or locale identifier.
+                   Defaults to the system currency locale or numeric locale.
     """
-    return Locale.parse(locale or LC_NUMERIC).currency_symbols.get(currency, currency)
+    return Locale.parse(locale or LC_MONETARY).currency_symbols.get(currency, currency)
 
 
 def get_currency_precision(currency: str) -> int:
@@ -184,9 +188,10 @@ def get_currency_unit_pattern(
     :param currency: the currency code.
     :param count: the optional count.  If provided the unit
                   pattern for that number will be returned.
-    :param locale: the `Locale` object or locale identifier. Defaults to the system numeric locale.
+    :param locale: the `Locale` object or locale identifier.
+                   Defaults to the system currency locale or numeric locale.
     """
-    loc = Locale.parse(locale or LC_NUMERIC)
+    loc = Locale.parse(locale or LC_MONETARY)
     if count is not None:
         plural_form = loc.plural_form(count)
         try:
@@ -763,7 +768,8 @@ def format_currency(
     :param number: the number to format
     :param currency: the currency code
     :param format: the format string to use
-    :param locale: the `Locale` object or locale identifier. Defaults to the system numeric locale.
+    :param locale: the `Locale` object or locale identifier.
+                   Defaults to the system currency locale or numeric locale.
     :param currency_digits: use the currency's natural number of decimal digits
     :param format_type: the currency format type to use
     :param decimal_quantization: Truncate and round high-precision numbers to
@@ -774,7 +780,7 @@ def format_currency(
                              The special value "default" will use the default numbering system of the locale.
     :raise `UnsupportedNumberingSystemError`: If the numbering system is not supported by the locale.
     """
-    locale = Locale.parse(locale or LC_NUMERIC)
+    locale = Locale.parse(locale or LC_MONETARY)
 
     if format_type == 'name':
         return _format_currency_long_name(
@@ -863,13 +869,14 @@ def format_compact_currency(
     :param number: the number to format
     :param currency: the currency code
     :param format_type: the compact format type to use. Defaults to "short".
-    :param locale: the `Locale` object or locale identifier. Defaults to the system numeric locale.
+    :param locale: the `Locale` object or locale identifier.
+                   Defaults to the system currency locale or numeric locale.
     :param fraction_digits: Number of digits after the decimal point to use. Defaults to `0`.
     :param numbering_system: The numbering system used for formatting number symbols. Defaults to "latn".
                              The special value "default" will use the default numbering system of the locale.
     :raise `UnsupportedNumberingSystemError`: If the numbering system is not supported by the locale.
     """
-    locale = Locale.parse(locale or LC_NUMERIC)
+    locale = Locale.parse(locale or LC_MONETARY)
     try:
         compact_format = locale.compact_currency_formats[format_type]
     except KeyError as error:
