[Python-checkins] python/nondist/sandbox/decimal money.py,NONE,1.1

[facundobatista at users.sourceforge.net]

Update of /cvsroot/python/python/nondist/sandbox/decimal
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv25435

Added Files:
	money.py 
Log Message:
Draft of Money class.

--- NEW FILE: money.py ---
import Decimal

Decimal.SetDefaultContext(Decimal.BASIC_DEFAULT_CONTEXT)
context = Decimal.getcontext()
context.prec = 20
context.rounding = Decimal.ROUND_HALF_UP

# styles for currency simbol
OUTSIDE = 'outside'     # $-15.36 or $(15.36)
INSIDE = 'inside'       # -$15.36 or ($15.36)

# styles for minus sign
DASH = 'dash'               # $-15.36 or -$15.36
PARENTHESES = 'parentheses' # $(15.36) or ($15.36)


class Money(Decimal.Decimal):
    '''Money class'''

    decimalSeparator = '.'
    thousandSeparator = ''
    currencySymbol = '$'
    decimal_positions = 2
    currSymbolStyle = OUTSIDE
    minusStyle = DASH
    
    def __init__(self, value=0):
        Decimal.Decimal.__init__(self, value)
        self.quantdec = Decimal.Decimal('1e-'+str(self.decimal_positions))

    def __str__(self):
        (sign, number, exp) = self.quantize(self.quantdec).as_tuple()
        numbint = number[:exp]
        numbdec = number[exp:]

        # convert to list and reverse
	nint = list(numbint)
	nint.reverse()
	parts_lrev = [nint[x:x+3] for x in range(0, len(nint), 3)]
	parts_lrev.reverse()

	# reverse each chunk
	parts_str = []
	for part in parts_lrev:
            part.reverse()
            parts_str.append(''.join(map(str, part)))

        # parts of the final string
        cSS = self.currSymbolStyle
        mS = self.minusStyle
        if sign:
            if cSS == OUTSIDE and mS == DASH:
                fstr = [self.currencySymbol, '-']
            elif cSS == INSIDE and mS == DASH:
                fstr = ['-', self.currencySymbol]
            elif cSS == OUTSIDE and mS == PARENTHESES:
                fstr = [self.currencySymbol, '(']
            elif cSS == INSIDE and mS == PARENTHESES:
                fstr = ['(', self.currencySymbol]
            else:
                raise ValueError, "Bad value for minus or currency symbol styles!"
        else:
            fstr = [self.currencySymbol]
            
        fstr.append(self.thousandSeparator.join(parts_str))
        fstr.append(self.decimalSeparator)
        fstr.extend(map(str, numbdec))

        if sign and mS == PARENTHESES:
            fstr.append(')')
        return ''.join(fstr)


    def __repr__(self):
        return "Money('%s')" % Decimal.Decimal.__str__(self)