Django - Models e métodos dinâmicos usando "templates"

fabric.py

def model_factory(name,desc,field):
    """Fabricates a model with the given name, using MODEL_TEMPLATE as reference.
    """
    
    format_dict = {
                   'CLASS_NAME' : name.capitalize(),
                   'CLASS_DESC' : desc,
                   'FIELD_NAME' : field,
                   }
    
        
    model_source = MODEL_TEMPLATE % format_dict    
    return model_source

models.py

MY_MODELS_LIST = (
    {'name':'Foo','desc':'Foo model', 'field':'foo_field'},
    {'name':'Bars','desc':'Bars model', 'field':'bars_field'},
    {'name':'Other','desc':'Other model', 'field':'other_field'},
)

#runs the generated models sources
for model_infos in MY_MODELS_LIST:
    model_source = model_factory(model_infos['name'],model_infos['desc'],model_infos['field'])
    exec(model_source)

template.py

MODEL_TEMPLATE =\
"""
class %(CLASS_NAME)s(models.Model):
    "%(CLASS_DESC)s"
    
    %(FIELD_NAME)s = models.CharField(max_length=256)

    def __unicode__(self):
        return self.%(FIELD_NAME)s
"""