numbers.py 文件源码

def parse_decimal(string, locale=LC_NUMERIC):
    """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')

    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

    :param string: the string to parse
    :param locale: the `Locale` object or locale identifier
    :raise NumberFormatError: if the string can not be converted to a
                              decimal number
    """
    locale = Locale.parse(locale)
    try:
        return Decimal(string.replace(get_group_symbol(locale), '')
                           .replace(get_decimal_symbol(locale), '.'))
    except InvalidOperation:
        raise NumberFormatError('%r is not a valid decimal number' % string)