module documentation

babel.numbers ~~~~~~~~~~~~~ Locale dependent formatting and parsing of numeric data. The default locale for the functions in this module is determined by the following environment variables, in that order: * ``LC_NUMERIC``, * ``LC_ALL``, and * ``LANG`` :copyright: (c) 2013-2023 by the Babel Team. :license: BSD, see LICENSE for more details.

Class NumberPattern No class docstring; 0/10 instance variable, 3/9 methods documented
Exception NumberFormatError Exception raised when a string cannot be parsed into a number.
Exception UnknownCurrencyError Exception thrown when a currency is requested for which no data is available.
Exception UnknownCurrencyFormatError Exception raised when an unknown currency format is requested.
Function format_compact_currency Format a number as a currency value in compact form.
Function format_compact_decimal Return the given decimal number formatted for a specific locale in compact form.
Function format_currency Return formatted currency value.
Function format_decimal Return the given decimal number formatted for a specific locale.
Function format_number Return the given number formatted for a specific locale.
Function format_percent Return formatted percent value for a specific locale.
Function format_scientific Return value formatted in scientific notation for a specific locale.
Function get_currency_name Return the name used by the locale for the specified currency.
Function get_currency_precision Return currency's precision.
Function get_currency_symbol Return the symbol used by the locale for the specified currency.
Function get_currency_unit_pattern Return the unit pattern used for long display of a currency value for a given locale. This is a string containing ``{0}`` where the numeric part should be substituted and ``{1}`` where the currency long display name should be substituted.
Function get_decimal_precision Return maximum precision of a decimal instance's fractional part.
Function get_decimal_quantum Return minimal quantum of a number, as defined by precision.
Function get_decimal_symbol Return the symbol used by the locale to separate decimal fractions.
Function get_exponential_symbol Return the symbol used by the locale to separate mantissa and exponent.
Function get_group_symbol Return the symbol used by the locale to separate groups of thousands.
Function get_infinity_symbol Return the symbol used by the locale to represent infinity.
Function get_minus_sign_symbol Return the plus sign symbol used by the current locale.
Function get_plus_sign_symbol Return the plus sign symbol used by the current locale.
Function get_territory_currencies Returns the list of currencies for the given territory that are valid for the given date range. In addition to that the currency database distinguishes between tender and non-tender currencies. By default only tender currencies are returned.
Function is_currency Returns `True` only if a currency is recognized by Babel.
Function list_currencies Return a `set` of normalized currency codes.
Function normalize_currency Returns the normalized identifier of any currency code.
Function parse_decimal Parse localized decimal string into a decimal.
Function parse_grouping Parse primary and secondary digit grouping
Function parse_number Parse localized number string into an integer.
Function parse_pattern Parse number format patterns
Function validate_currency Check the currency code is recognized by Babel.
Constant LC_NUMERIC Undocumented
Constant NUMBER_PATTERN Undocumented
Constant NUMBER_TOKEN Undocumented
Constant PREFIX_END Undocumented
Constant PREFIX_PATTERN Undocumented
Constant SUFFIX_PATTERN Undocumented
Variable number_re Undocumented
Function _format_currency_long_name Undocumented
Function _get_compact_format Returns the number after dividing by the unit and the format pattern to use. The algorithm is described here: https://www.unicode.org/reports/tr35/tr35-45/tr35-numbers.html#Compact_Number_Formats.
def format_compact_currency(number: (float|decimal.Decimal)|str, currency: str, *, format_type: Literal['short'] = 'short', locale: (Locale|str)|None = LC_NUMERIC, fraction_digits: int = 0) -> str: (source)

Format a number as a currency value in compact form. >>> format_compact_currency(12345, 'USD', locale='en_US') u'$12K' >>> format_compact_currency(123456789, 'USD', locale='en_US', fraction_digits=2) u'$123.46M' >>> format_compact_currency(123456789, 'EUR', locale='de_DE', fraction_digits=1) '123,5 Mio. €' :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 :param fraction_digits: Number of digits after the decimal point to use. Defaults to `0`.

def format_compact_decimal(number: (float|decimal.Decimal)|str, *, format_type: Literal['short', 'long'] = 'short', locale: (Locale|str)|None = LC_NUMERIC, fraction_digits: int = 0) -> str: (source)

Return the given decimal number formatted for a specific locale in compact form. >>> format_compact_decimal(12345, format_type="short", locale='en_US') u'12K' >>> format_compact_decimal(12345, format_type="long", locale='en_US') u'12 thousand' >>> format_compact_decimal(12345, format_type="short", locale='en_US', fraction_digits=2) u'12.34K' >>> format_compact_decimal(1234567, format_type="short", locale="ja_JP") u'123万' >>> format_compact_decimal(2345678, format_type="long", locale="mk") u'2 милиони' >>> format_compact_decimal(21000000, format_type="long", locale="mk") u'21 милион' :param number: the number to format :param format_type: Compact format to use ("short" or "long") :param locale: the `Locale` object or locale identifier :param fraction_digits: Number of digits after the decimal point to use. Defaults to `0`.

def format_currency(number: (float|decimal.Decimal)|str, currency: str, format: (str|NumberPattern)|None = None, locale: (Locale|str)|None = LC_NUMERIC, currency_digits: bool = True, format_type: Literal['name', 'standard', 'accounting'] = 'standard', decimal_quantization: bool = True, group_separator: bool = True) -> str: (source)

Return formatted currency value. >>> format_currency(1099.98, 'USD', locale='en_US') '$1,099.98' >>> format_currency(1099.98, 'USD', locale='es_CO') u'US$1.099,98' >>> format_currency(1099.98, 'EUR', locale='de_DE') u'1.099,98\xa0\u20ac' The format can also be specified explicitly. The currency is placed with the '¤' sign. As the sign gets repeated the format expands (¤ being the symbol, ¤¤ is the currency abbreviation and ¤¤¤ is the full name of the currency): >>> format_currency(1099.98, 'EUR', u'¤¤ #,##0.00', locale='en_US') u'EUR 1,099.98' >>> format_currency(1099.98, 'EUR', u'#,##0.00 ¤¤¤', locale='en_US') u'1,099.98 euros' Currencies usually have a specific number of decimal digits. This function favours that information over the given format: >>> format_currency(1099.98, 'JPY', locale='en_US') u'\xa51,100' >>> format_currency(1099.98, 'COP', u'#,##0.00', locale='es_ES') u'1.099,98' However, the number of decimal digits can be overridden from the currency information, by setting the last parameter to ``False``: >>> format_currency(1099.98, 'JPY', locale='en_US', currency_digits=False) u'\xa51,099.98' >>> format_currency(1099.98, 'COP', u'#,##0.00', locale='es_ES', currency_digits=False) u'1.099,98' If a format is not specified the type of currency format to use from the locale can be specified: >>> format_currency(1099.98, 'EUR', locale='en_US', format_type='standard') u'\u20ac1,099.98' When the given currency format type is not available, an exception is raised: >>> format_currency('1099.98', 'EUR', locale='root', format_type='unknown') Traceback (most recent call last): ... UnknownCurrencyFormatError: "'unknown' is not a known currency format type" >>> format_currency(101299.98, 'USD', locale='en_US', group_separator=False) u'$101299.98' >>> format_currency(101299.98, 'USD', locale='en_US', group_separator=True) u'$101,299.98' You can also pass format_type='name' to use long display names. The order of the number and currency name, along with the correct localized plural form of the currency name, is chosen according to locale: >>> format_currency(1, 'USD', locale='en_US', format_type='name') u'1.00 US dollar' >>> format_currency(1099.98, 'USD', locale='en_US', format_type='name') u'1,099.98 US dollars' >>> format_currency(1099.98, 'USD', locale='ee', format_type='name') u'us ga dollar 1,099.98' By default the locale is allowed to truncate and round a high-precision number by forcing its format pattern onto the decimal part. You can bypass this behavior with the `decimal_quantization` parameter: >>> format_currency(1099.9876, 'USD', locale='en_US') u'$1,099.99' >>> format_currency(1099.9876, 'USD', locale='en_US', decimal_quantization=False) u'$1,099.9876' :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 :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 the format pattern. Defaults to `True`. :param group_separator: Boolean to switch group separator on/off in a locale's number format.

def format_decimal(number: (float|decimal.Decimal)|str, format: (str|NumberPattern)|None = None, locale: (Locale|str)|None = LC_NUMERIC, decimal_quantization: bool = True, group_separator: bool = True) -> str: (source)

Return the given decimal number formatted for a specific locale. >>> format_decimal(1.2345, locale='en_US') u'1.234' >>> format_decimal(1.2346, locale='en_US') u'1.235' >>> format_decimal(-1.2346, locale='en_US') u'-1.235' >>> format_decimal(1.2345, locale='sv_SE') u'1,234' >>> format_decimal(1.2345, locale='de') u'1,234' The appropriate thousands grouping and the decimal separator are used for each locale: >>> format_decimal(12345.5, locale='en_US') u'12,345.5' By default the locale is allowed to truncate and round a high-precision number by forcing its format pattern onto the decimal part. You can bypass this behavior with the `decimal_quantization` parameter: >>> format_decimal(1.2346, locale='en_US') u'1.235' >>> format_decimal(1.2346, locale='en_US', decimal_quantization=False) u'1.2346' >>> format_decimal(12345.67, locale='fr_CA', group_separator=False) u'12345,67' >>> format_decimal(12345.67, locale='en_US', group_separator=True) u'12,345.67' :param number: the number to format :param format: :param locale: the `Locale` object or locale identifier :param decimal_quantization: Truncate and round high-precision numbers to the format pattern. Defaults to `True`. :param group_separator: Boolean to switch group separator on/off in a locale's number format.

def format_number(number: (float|decimal.Decimal)|str, locale: (Locale|str)|None = LC_NUMERIC) -> str: (source)

Return the given number formatted for a specific locale. >>> format_number(1099, locale='en_US') # doctest: +SKIP u'1,099' >>> format_number(1099, locale='de_DE') # doctest: +SKIP u'1.099' .. deprecated:: 2.6.0 Use babel.numbers.format_decimal() instead. :param number: the number to format :param locale: the `Locale` object or locale identifier

def format_percent(number: (float|decimal.Decimal)|str, format: (str|NumberPattern)|None = None, locale: (Locale|str)|None = LC_NUMERIC, decimal_quantization: bool = True, group_separator: bool = True) -> str: (source)

Return formatted percent value for a specific locale. >>> format_percent(0.34, locale='en_US') u'34%' >>> format_percent(25.1234, locale='en_US') u'2,512%' >>> format_percent(25.1234, locale='sv_SE') u'2\xa0512\xa0%' The format pattern can also be specified explicitly: >>> format_percent(25.1234, u'#,##0‰', locale='en_US') u'25,123‰' By default the locale is allowed to truncate and round a high-precision number by forcing its format pattern onto the decimal part. You can bypass this behavior with the `decimal_quantization` parameter: >>> format_percent(23.9876, locale='en_US') u'2,399%' >>> format_percent(23.9876, locale='en_US', decimal_quantization=False) u'2,398.76%' >>> format_percent(229291.1234, locale='pt_BR', group_separator=False) u'22929112%' >>> format_percent(229291.1234, locale='pt_BR', group_separator=True) u'22.929.112%' :param number: the percent number to format :param format: :param locale: the `Locale` object or locale identifier :param decimal_quantization: Truncate and round high-precision numbers to the format pattern. Defaults to `True`. :param group_separator: Boolean to switch group separator on/off in a locale's number format.

def format_scientific(number: (float|decimal.Decimal)|str, format: (str|NumberPattern)|None = None, locale: (Locale|str)|None = LC_NUMERIC, decimal_quantization: bool = True) -> str: (source)

Return value formatted in scientific notation for a specific locale. >>> format_scientific(10000, locale='en_US') u'1E4' The format pattern can also be specified explicitly: >>> format_scientific(1234567, u'##0.##E00', locale='en_US') u'1.23E06' By default the locale is allowed to truncate and round a high-precision number by forcing its format pattern onto the decimal part. You can bypass this behavior with the `decimal_quantization` parameter: >>> format_scientific(1234.9876, u'#.##E0', locale='en_US') u'1.23E3' >>> format_scientific(1234.9876, u'#.##E0', locale='en_US', decimal_quantization=False) u'1.2349876E3' :param number: the number to format :param format: :param locale: the `Locale` object or locale identifier :param decimal_quantization: Truncate and round high-precision numbers to the format pattern. Defaults to `True`.

def get_currency_name(currency: str, count: (float|decimal.Decimal)|None = None, locale: (Locale|str)|None = LC_NUMERIC) -> str: (source)

Return the name used by the locale for the specified currency. >>> get_currency_name('USD', locale='en_US') u'US Dollar' .. versionadded:: 0.9.4 :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.

def get_currency_precision(currency: str) -> int: (source)

Return currency's precision. Precision is the number of decimals found after the decimal point in the currency's format pattern. .. versionadded:: 2.5.0 :param currency: the currency code.

def get_currency_symbol(currency: str, locale: (Locale|str)|None = LC_NUMERIC) -> str: (source)

Return the symbol used by the locale for the specified currency. >>> get_currency_symbol('USD', locale='en_US') u'$' :param currency: the currency code. :param locale: the `Locale` object or locale identifier.

def get_currency_unit_pattern(currency: str, count: (float|decimal.Decimal)|None = None, locale: (Locale|str)|None = LC_NUMERIC) -> str: (source)

Return the unit pattern used for long display of a currency value for a given locale. This is a string containing ``{0}`` where the numeric part should be substituted and ``{1}`` where the currency long display name should be substituted. >>> get_currency_unit_pattern('USD', locale='en_US', count=10) u'{0} {1}' .. versionadded:: 2.7.0 :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.

def get_decimal_precision(number: decimal.Decimal) -> int: (source)

Return maximum precision of a decimal instance's fractional part. Precision is extracted from the fractional part only.

def get_decimal_quantum(precision: int|decimal.Decimal) -> decimal.Decimal: (source)

Return minimal quantum of a number, as defined by precision.

def get_decimal_symbol(locale: (Locale|str)|None = LC_NUMERIC) -> str: (source)

Return the symbol used by the locale to separate decimal fractions. >>> get_decimal_symbol('en_US') u'.' :param locale: the `Locale` object or locale identifier

def get_exponential_symbol(locale: (Locale|str)|None = LC_NUMERIC) -> str: (source)

Return the symbol used by the locale to separate mantissa and exponent. >>> get_exponential_symbol('en_US') u'E' :param locale: the `Locale` object or locale identifier

def get_group_symbol(locale: (Locale|str)|None = LC_NUMERIC) -> str: (source)

Return the symbol used by the locale to separate groups of thousands. >>> get_group_symbol('en_US') u',' :param locale: the `Locale` object or locale identifier

def get_infinity_symbol(locale: (Locale|str)|None = LC_NUMERIC) -> str: (source)

Return the symbol used by the locale to represent infinity. >>> get_infinity_symbol('en_US') u'∞' :param locale: the `Locale` object or locale identifier

def get_minus_sign_symbol(locale: (Locale|str)|None = LC_NUMERIC) -> str: (source)

Return the plus sign symbol used by the current locale. >>> get_minus_sign_symbol('en_US') u'-' :param locale: the `Locale` object or locale identifier

def get_plus_sign_symbol(locale: (Locale|str)|None = LC_NUMERIC) -> str: (source)

Return the plus sign symbol used by the current locale. >>> get_plus_sign_symbol('en_US') u'+' :param locale: the `Locale` object or locale identifier

@overload
def get_territory_currencies(territory: str, start_date: datetime.date|None = ..., end_date: datetime.date|None = ..., tender: bool = ..., non_tender: bool = ..., include_details: Literal[False] = ...) -> list[str]:
@overload
def get_territory_currencies(territory: str, start_date: datetime.date|None = ..., end_date: datetime.date|None = ..., tender: bool = ..., non_tender: bool = ..., include_details: Literal[True] = ...) -> list[dict[str, Any]]:
(source)

Returns the list of currencies for the given territory that are valid for the given date range. In addition to that the currency database distinguishes between tender and non-tender currencies. By default only tender currencies are returned. The return value is a list of all currencies roughly ordered by the time of when the currency became active. The longer the currency is being in use the more to the left of the list it will be. The start date defaults to today. If no end date is given it will be the same as the start date. Otherwise a range can be defined. For instance this can be used to find the currencies in use in Austria between 1995 and 2011: >>> from datetime import date >>> get_territory_currencies('AT', date(1995, 1, 1), date(2011, 1, 1)) ['ATS', 'EUR'] Likewise it's also possible to find all the currencies in use on a single date: >>> get_territory_currencies('AT', date(1995, 1, 1)) ['ATS'] >>> get_territory_currencies('AT', date(2011, 1, 1)) ['EUR'] By default the return value only includes tender currencies. This however can be changed: >>> get_territory_currencies('US') ['USD'] >>> get_territory_currencies('US', tender=False, non_tender=True, ... start_date=date(2014, 1, 1)) ['USN', 'USS'] .. versionadded:: 2.0 :param territory: the name of the territory to find the currency for. :param start_date: the start date. If not given today is assumed. :param end_date: the end date. If not given the start date is assumed. :param tender: controls whether tender currencies should be included. :param non_tender: controls whether non-tender currencies should be included. :param include_details: if set to `True`, instead of returning currency codes the return value will be dictionaries with detail information. In that case each dictionary will have the keys ``'currency'``, ``'from'``, ``'to'``, and ``'tender'``.

def is_currency(currency: str, locale: (Locale|str)|None = None) -> bool: (source)

Returns `True` only if a currency is recognized by Babel. This method always return a Boolean and never raise.

def list_currencies(locale: (Locale|str)|None = None) -> set[str]: (source)

Return a `set` of normalized currency codes. .. versionadded:: 2.5.0 :param locale: filters returned currency codes by the provided locale. Expected to be a locale instance or code. If no locale is provided, returns the list of all currencies from all locales.

def normalize_currency(currency: str, locale: (Locale|str)|None = None) -> str|None: (source)

Returns the normalized identifier of any currency code. Accepts a ``locale`` parameter for fined-grained validation, working as the one defined above in ``list_currencies()`` method. Returns None if the currency is unknown to Babel.

def parse_decimal(string: str, locale: (Locale|str)|None = LC_NUMERIC, strict: bool = False) -> decimal.Decimal: (source)

Parse localized decimal string into a decimal. >>> parse_decimal('1,099.98', locale='en_US') Decimal('1099.98') >>> parse_decimal('1.099,98', locale='de') Decimal('1099.98') >>> parse_decimal('12 345,123', locale='ru') Decimal('12345.123') When the given string cannot be parsed, an exception is raised: >>> parse_decimal('2,109,998', locale='de') Traceback (most recent call last): ... NumberFormatError: '2,109,998' is not a valid decimal number If `strict` is set to `True` and the given string contains a number formatted in an irregular way, an exception is raised: >>> parse_decimal('30.00', locale='de', strict=True) Traceback (most recent call last): ... NumberFormatError: '30.00' is not a properly formatted decimal number. Did you mean '3.000'? Or maybe '30,00'? >>> parse_decimal('0.00', locale='de', strict=True) Traceback (most recent call last): ... NumberFormatError: '0.00' is not a properly formatted decimal number. Did you mean '0'? :param string: the string to parse :param locale: the `Locale` object or locale identifier :param strict: controls whether numbers formatted in a weird way are accepted or rejected :raise NumberFormatError: if the string can not be converted to a decimal number

def parse_grouping(p: str) -> tuple[int, int]: (source)

Parse primary and secondary digit grouping >>> parse_grouping('##') (1000, 1000) >>> parse_grouping('#,###') (3, 3) >>> parse_grouping('#,####,###') (3, 4)

def parse_number(string: str, locale: (Locale|str)|None = LC_NUMERIC) -> int: (source)

Parse localized number string into an integer. >>> parse_number('1,099', locale='en_US') 1099 >>> parse_number('1.099', locale='de_DE') 1099 When the given string cannot be parsed, an exception is raised: >>> parse_number('1.099,98', locale='de') Traceback (most recent call last): ... NumberFormatError: '1.099,98' is not a valid number :param string: the string to parse :param locale: the `Locale` object or locale identifier :return: the parsed number :raise `NumberFormatError`: if the string can not be converted to a number

def parse_pattern(pattern: NumberPattern|str) -> NumberPattern: (source)

Parse number format patterns

def validate_currency(currency: str, locale: (Locale|str)|None = None): (source)

Check the currency code is recognized by Babel. Accepts a ``locale`` parameter for fined-grained validation, working as the one defined above in ``list_currencies()`` method. Raises a `UnknownCurrencyError` exception if the currency is unknown to Babel.

LC_NUMERIC = (source)

Undocumented

Value
default_locale('LC_NUMERIC')
NUMBER_PATTERN = (source)

Undocumented

Value
'(?P<number>%s*)'%NUMBER_TOKEN
NUMBER_TOKEN: str = (source)

Undocumented

Value
'[0-9@#.,E+]'
PREFIX_END: str = (source)

Undocumented

Value
'[^0-9@#.,]'
PREFIX_PATTERN = (source)

Undocumented

Value
'(?P<prefix>(?:\'[^\']*\'|%s)*)'%PREFIX_END
SUFFIX_PATTERN: str = (source)

Undocumented

Value
'(?P<suffix>.*)'
number_re = (source)

Undocumented

def _format_currency_long_name(number: (float|decimal.Decimal)|str, currency: str, format: (str|NumberPattern)|None = None, locale: (Locale|str)|None = LC_NUMERIC, currency_digits: bool = True, format_type: Literal['name', 'standard', 'accounting'] = 'standard', decimal_quantization: bool = True, group_separator: bool = True) -> str: (source)

Undocumented

def _get_compact_format(number: (float|decimal.Decimal)|str, compact_format: LocaleDataDict, locale: Locale, fraction_digits: int) -> tuple[decimal.Decimal, NumberPattern|None]: (source)

Returns the number after dividing by the unit and the format pattern to use. The algorithm is described here: https://www.unicode.org/reports/tr35/tr35-45/tr35-numbers.html#Compact_Number_Formats.