Detect data type from custom fields

I have this schema, with some custom fields:

import rows


class MoneyField(rows.fields.TextField):

    @classmethod
    def deserialize(cls, value):
        value = value.replace('.', '')\
                     .replace(',', '.')
        return super().deserialize(value)


class DocumentField(rows.fields.TextField):

    @classmethod
    def deserialize(cls, value):
        value = value.replace(' ', '')\
                     .replace('.', '')\
                     .replace('-', '').strip()
        return super().deserialize(value)

schema = OrderedDict([
        ('arquivoOrigem', rows.fields.TextField),
        ('codLegislatura', rows.fields.IntegerField),
        ('datEmissao', rows.fields.DatetimeField),
        ('ideDocumento', rows.fields.IntegerField),
        ('idecadastro', rows.fields.IntegerField),
        ('indTipoDocumento', rows.fields.IntegerField),
        ('nuCarteiraParlamentar', rows.fields.IntegerField),
        ('nuDeputadoId', rows.fields.IntegerField),
        ('nuLegislatura', rows.fields.IntegerField),
        ('numAno', rows.fields.IntegerField),
        ('numEspecificacaoSubCota', rows.fields.IntegerField),
        ('numLote', rows.fields.IntegerField),
        ('numMes', rows.fields.IntegerField),
        ('numParcela', rows.fields.IntegerField),
        ('numRessarcimento', rows.fields.IntegerField),
        ('numSubCota', rows.fields.IntegerField),
        ('sgPartido', rows.fields.TextField),
        ('sgUF', rows.fields.TextField),
        ('txNomeParlamentar', rows.fields.TextField),
        ('txtCNPJCPF', DocumentField),
        ('txtDescricao', rows.fields.TextField),
        ('txtDescricaoEspecificacao', rows.fields.TextField),
        ('txtFornecedor', rows.fields.TextField),
        ('txtNumero', rows.fields.TextField),
        ('txtPassageiro', rows.fields.TextField),
        ('txtTrecho', rows.fields.TextField),
        ('vlrDocumento', MoneyField),
        ('vlrGlosa', MoneyField),
        ('vlrLiquido', MoneyField),
        ('vlrRestituicao', MoneyField),
])

It works when I import data using it (rows.Table(fields=schema)) but won't work in an expected way if I try to export this table, because the library does not know how to export MoneyField and DocumentField to SQLite (only knows rows.fields.*Field classes). As a user, to fix this I needed to have a specific schema for the Table object, like this:

    def convert_field(FieldClass):
        if FieldClass is MoneyField:
            return rows.fields.DecimalField
        elif FieldClass is DocumentField:
            return rows.fields.TextField
        else:
            return FieldClass
    schema_rows = OrderedDict([(field_name, convert_field(Field))
                               for field_name, Field in schema.items()])

The library should detect from the values produced by the class or by inspecting it.