python货币格式化方法

python开发中时长到货币格式化的问题，一般情况下可以使用locale模块。但是这个模块使用起来不是那么顺手，今天我为大家介绍一个很好用的方法。

直接上代码。。。

from decimal import *
def moneyfmt(value, places=2, curr=\'\', sep=\',\', dp=\'.\',pos=\'\', neg=\'-\', trailneg=\'\'):
    \"\"\"Convert Decimal to a money formatted string.
 
    places:  required number of places after the decimal point
    curr:    optional currency symbol before the sign (may be blank)
    sep:     optional grouping separator (comma, period, space, or blank)
    dp:      decimal point indicator (comma or period)
             only specify as blank when places is zero
    pos:     optional sign for positive numbers: \'+\', space or blank
    neg:     optional sign for negative numbers: \'-\', \'(\', space or blank
    trailneg:optional trailing minus indicator:  \'-\', \')\', space or blank
 
    >>> d = Decimal(\'-1234567.8901\')
    >>> moneyfmt(d, curr=\'$\')
    \'-$1,234,567.89\'
    >>> moneyfmt(d, places=0, sep=\'.\', dp=\'\', neg=\'\', trailneg=\'-\')
    \'1.234.568-\'
    >>> moneyfmt(d, curr=\'$\', neg=\'(\', trailneg=\')\')
    \'($1,234,567.89)\'
    >>> moneyfmt(Decimal(123456789), sep=\' \')
    \'123 456 789.00\'
    >>> moneyfmt(Decimal(\'-0.02\'), neg=\'<\', trailneg=\'>\')
    \'<0.02>\'
 
    \"\"\"
    value = Decimal(value)
    q = Decimal(10) ** -places      # 2 places --> \'0.01\'
    sign, digits, exp = value.quantize(q).as_tuple()
    result = []
    digits = map(str, digits)
    build, next = result.append, digits.pop
    if sign:
        build(trailneg)
    for i in range(places):
        build(next() if digits else \'0\')
    build(dp)
    if not digits:
        build(\'0\')
    i = 0
    while digits:
        build(next())
        i += 1
        if i == 3 and digits:
            i = 0
            build(sep)
    build(curr)
    build(neg if sign else pos)
    return \'\'.join(reversed(result))
 
print moneyfmt(\'1234.45\',sep=\',\', dp=\'.\')

结果：

1,234.45

很简单吧。。。