Django form field for Brazilian Real (R$)

formatters.py

from django.template.defaultfilters import floatformat
from django.contrib.humanize.templatetags.humanize import intcomma
from django.utils.encoding import force_unicode

def decimal_to_real(value, precision=2):
    '''
    Receives a Decimal instance and returns a string formatted as brazilian Real currency:
    12,234.00. Without the "R$".
    '''
    value = floatformat(value, precision)
    value, decimal = force_unicode(value).split('.')
    value = intcomma(value)
    value = value.replace(',', '.') + ',' + decimal
    return value

formfields.py

from django import forms

from widgets import RealCurrencyInput

class RealCurrencyField(forms.DecimalField):
    widget = RealCurrencyInput
    
    def clean(self, value):
        if value:
            value = value.replace('.', '').replace(',','.')
        return super(RealCurrencyField, self).clean(value)
    
    def widget_attrs(self, widget):
        return {'class':'real_currency'}

widgets.py

from decimal import Decimal

from django import forms
from django.utils.safestring import mark_safe

from formatters import decimal_to_real

class RealCurrencyInput(forms.TextInput):
    
    def render(self, name, value, attrs=None):
        value = value or ''
        if isinstance(value, Decimal):
            value = decimal_to_real(str(value), 2)
        attrs = attrs or {}
        attrs['class'] = 'real'
        attrs['alt'] = 'decimal'
        html = super(RealCurrencyInput, self).render(name, value, attrs)
        return mark_safe(u"R$ " + html)