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Get the display name for a measurement unit in the given locale.
>>> get_unit_name("radian", locale="en")
'radians'
Unknown units will raise exceptions:
>>> get_unit_name("battery", locale="fi")
Traceback (most recent call last):
...
UnknownUnitError: battery/long is not a known unit/length in fi
:param measurement_unit: the code of a measurement unit.
Known units can be found in the CLDR Unit Validity XML file:
https://unicode.org/repos/cldr/tags/latest/common/validity/unit.xml
:param length: "short", "long" or "narrow"
:param locale: the `Locale` object or locale identifier
:return: The unit display name, or None.
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Expand an unit into a qualified form.
Known units can be found in the CLDR Unit Validity XML file:
https://unicode.org/repos/cldr/tags/latest/common/validity/unit.xml
>>> _find_unit_pattern("radian", locale="en")
'angle-radian'
Unknown values will return None.
>>> _find_unit_pattern("horse", locale="en")
:param unit_id: the code of a measurement unit.
:return: A key to the `unit_patterns` mapping, or None.
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Values are formatted according to the locale's usual pluralization rules
and number formats.
>>> format_unit(12, 'length-meter', locale='ro_RO')
u'12 metri'
>>> format_unit(15.5, 'length-mile', locale='fi_FI')
u'15,5 mailia'
>>> format_unit(1200, 'pressure-millimeter-ofhg', locale='nb')
u'1\xa0200 millimeter kvikks\xf8lv'
>>> format_unit(270, 'ton', locale='en')
u'270 tons'
Number formats may be overridden with the ``format`` parameter.
>>> import decimal
>>> format_unit(decimal.Decimal("-42.774"), 'temperature-celsius', 'short', format='#.0', locale='fr')
u'-42,8\u202f\xb0C'
The locale's usual pluralization rules are respected.
>>> format_unit(1, 'length-meter', locale='ro_RO')
u'1 metru'
>>> format_unit(0, 'length-mile', locale='cy')
u'0 mi'
>>> format_unit(1, 'length-mile', locale='cy')
u'1 filltir'
>>> format_unit(3, 'length-mile', locale='cy')
u'3 milltir'
>>> format_unit(15, 'length-horse', locale='fi')
Traceback (most recent call last):
...
UnknownUnitError: length-horse is not a known unit in fi
.. versionadded:: 2.2.0
:param value: the value to format. If this is a string, no number formatting will be attempted.
:param measurement_unit: the code of a measurement unit.
Known units can be found in the CLDR Unit Validity XML file:
https://unicode.org/repos/cldr/tags/latest/common/validity/unit.xml
:param length: "short", "long" or "narrow"
:param format: An optional format, as accepted by `format_decimal`.
:param locale: the `Locale` object or locale identifier
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Find a predefined compound unit pattern.
Used internally by format_compound_unit.
>>> _find_compound_unit("kilometer", "hour", locale="en")
'speed-kilometer-per-hour'
>>> _find_compound_unit("mile", "gallon", locale="en")
'consumption-mile-per-gallon'
If no predefined compound pattern can be found, `None` is returned.
>>> _find_compound_unit("gallon", "mile", locale="en")
>>> _find_compound_unit("horse", "purple", locale="en")
:param numerator_unit: The numerator unit's identifier
:param denominator_unit: The denominator unit's identifier
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Format a compound number value, i.e. "kilometers per hour" or similar.
Both unit specifiers are optional to allow for formatting of arbitrary values still according
to the locale's general "per" formatting specifier.
>>> format_compound_unit(7, denominator_value=11, length="short", locale="pt")
'7/11'
>>> format_compound_unit(150, "kilometer", denominator_unit="hour", locale="sv")
'150 kilometer per timme'
>>> format_compound_unit(150, "kilowatt", denominator_unit="year", locale="fi")
'150 kilowattia / vuosi'
>>> format_compound_unit(32.5, "ton", 15, denominator_unit="hour", locale="en")
'32.5 tons per 15 hours'
>>> format_compound_unit(160, denominator_unit="square-meter", locale="fr")
'160 par m\xe8tre carr\xe9'
>>> format_compound_unit(4, "meter", "ratakisko", length="short", locale="fi")
'4 m/ratakisko'
>>> format_compound_unit(35, "minute", denominator_unit="fathom", locale="sv")
'35 minuter per famn'
>>> from babel.numbers import format_currency
>>> format_compound_unit(format_currency(35, "JPY", locale="de"), denominator_unit="liter", locale="de")
'35\xa0\xa5 pro Liter'
See https://www.unicode.org/reports/tr35/tr35-general.html#perUnitPatterns
:param numerator_value: The numerator value. This may be a string,
in which case it is considered preformatted and the unit is ignored.
:param numerator_unit: The numerator unit. See `format_unit`.
:param denominator_value: The denominator value. This may be a string,
in which case it is considered preformatted and the unit is ignored.
:param denominator_unit: The denominator unit. See `format_unit`.
:param length: The formatting length. "short", "long" or "narrow"
:param format: An optional format, as accepted by `format_decimal`.
:param locale: the `Locale` object or locale identifier
:return: A formatted compound value.
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