babel文档指出,数字解析还没有完全实现,但是他们为将货币信息输入库中做了很多工作。您可以使用get_currency_name()
和get_currency_symbol()
获取货币详细信息,还可以使用所有其他get_...
功能获取常规数字详细信息(小数点,减号等)。
使用该信息,您可以从货币字符串中排除货币详细信息(名称,符号)和分组(例如,
在美国)。然后,将小数位详细信息更改为C
语言环境所使用的详细信息(-
减号和.
小数点)。
这样就产生了这段代码(我添加了一个对象来保留一些数据,在后续处理中可能会很方便):
import re, os
from babel import numbers as n
from babel.core import default_locale
class AmountInfo(object):
def __init__(self, name, symbol, value):
self.name = name
self.symbol = symbol
self.value = value
def parse_currency(value, cur):
decp = n.get_decimal_symbol()
plus = n.get_plus_sign_symbol()
minus = n.get_minus_sign_symbol()
group = n.get_group_symbol()
name = n.get_currency_name(cur)
symbol = n.get_currency_symbol(cur)
remove = [plus, name, symbol, group]
for token in remove:
# remove the pieces of information that shall be obvIoUs
value = re.sub(re.escape(token), '', value)
# change the minus sign to a LOCALE=C minus
value = re.sub(re.escape(minus), '-', value)
# and change the decimal mark to a LOCALE=C decimal point
value = re.sub(re.escape(decp), '.', value)
# just in case remove extraneous spaces
value = re.sub('\s+', '', value)
return AmountInfo(name, symbol, value)
#cur_loc = os.environ['LC_ALL']
cur_loc = default_locale()
print('locale:', cur_loc)
test = [ (n.format_currency(123456.789, 'USD', locale=cur_loc), 'USD')
, (n.format_currency(-123456.78, 'PLN', locale=cur_loc), 'PLN')
, (n.format_currency(123456.789, 'PLN', locale=cur_loc), 'PLN')
, (n.format_currency(123456.789, 'IDR', locale=cur_loc), 'IDR')
, (n.format_currency(123456.789, 'JPY', locale=cur_loc), 'JPY')
, (n.format_currency(-123456.78, 'JPY', locale=cur_loc), 'JPY')
, (n.format_currency(123456.789, 'CNY', locale=cur_loc), 'CNY')
, (n.format_currency(-123456.78, 'CNY', locale=cur_loc), 'CNY')
]
for v,c in test:
print('As currency :', c, ':', v.encode('utf-8'))
info = parse_currency(v, c)
print('As value :', c, ':', info.value)
print('Extra info :', info.name.encode('utf-8')
, info.symbol.encode('utf-8'))
输出看起来很有希望(在美国语言环境中):
$ export LC_ALL=en_US
$ ./cur.py
locale: en_US
As currency : USD : b'$123,456.79'
As value : USD : 123456.79
Extra info : b'US Dollar' b'$'
As currency : PLN : b'-z\xc5\x82123,456.78'
As value : PLN : -123456.78
Extra info : b'Polish Zloty' b'z\xc5\x82'
As currency : PLN : b'z\xc5\x82123,456.79'
As value : PLN : 123456.79
Extra info : b'Polish Zloty' b'z\xc5\x82'
As currency : IDR : b'Rp123,457'
As value : IDR : 123457
Extra info : b'Indonesian Rupiah' b'Rp'
As currency : JPY : b'\xc2\xa5123,457'
As value : JPY : 123457
Extra info : b'Japanese Yen' b'\xc2\xa5'
As currency : JPY : b'-\xc2\xa5123,457'
As value : JPY : -123457
Extra info : b'Japanese Yen' b'\xc2\xa5'
As currency : CNY : b'CN\xc2\xa5123,456.79'
As value : CNY : 123456.79
Extra info : b'Chinese Yuan' b'CN\xc2\xa5'
As currency : CNY : b'-CN\xc2\xa5123,456.78'
As value : CNY : -123456.78
Extra info : b'Chinese Yuan' b'CN\xc2\xa5'
而且它仍然可以在不同的语言环境中工作(巴西以逗号作为小数点而著称):
$ export LC_ALL=pt_BR
$ ./cur.py
locale: pt_BR
As currency : USD : b'US$123.456,79'
As value : USD : 123456.79
Extra info : b'D\xc3\xb3lar americano' b'US$'
As currency : PLN : b'-PLN123.456,78'
As value : PLN : -123456.78
Extra info : b'Zloti polon\xc3\xaas' b'PLN'
As currency : PLN : b'PLN123.456,79'
As value : PLN : 123456.79
Extra info : b'Zloti polon\xc3\xaas' b'PLN'
As currency : IDR : b'IDR123.457'
As value : IDR : 123457
Extra info : b'Rupia indon\xc3\xa9sia' b'IDR'
As currency : JPY : b'JP\xc2\xa5123.457'
As value : JPY : 123457
Extra info : b'Iene japon\xc3\xaas' b'JP\xc2\xa5'
As currency : JPY : b'-JP\xc2\xa5123.457'
As value : JPY : -123457
Extra info : b'Iene japon\xc3\xaas' b'JP\xc2\xa5'
As currency : CNY : b'CN\xc2\xa5123.456,79'
As value : CNY : 123456.79
Extra info : b'Yuan chin\xc3\xaas' b'CN\xc2\xa5'
As currency : CNY : b'-CN\xc2\xa5123.456,78'
As value : CNY : -123456.78
Extra info : b'Yuan chin\xc3\xaas' b'CN\xc2\xa5'
值得指出的是babel
存在一些编码问题。这是因为(中的locale- data
)区域设置文件本身确实使用了不同的编码。如果您使用的是货币,那么应该不会有问题。但是,如果您尝试使用不熟悉的货币,则可能会遇到问题(我刚刚了解到波兰使用iso-8859-2
,而不是iso-8859-1
)。