def do_float(value, default=0.0):
    try:
        return float(value)
    except (TypeError, ValueError):
        return default
Returns an xml element containing the blobstore.BlobKey and
dataset/ETHPy150Open GoogleCloudPlatform/appengine-flask-skeleton/lib/jinja2/filters.py/do_float--crossover with--dataset/ETHPy150Open jahlborn/appengine-rest-server/src/main/python/rest/__init__.py/BlobReferenceHandler.write_xml_value