CONST_abated.py

import logging


# Whoops. Too lax(ative) with the syntax.
class CONSTAbatedException(Exception):
    UNEXPECTED_OBJECT_TYPE_GOT_S = 'Unexpected object type. Need dictionary, got %s.'


def __populate_object(const_object, values):
    if isinstance(values, dict):
        for var, val in values.items():
            logging.debug('setting variable %s' % var)
            setattr(const_object, var, val)
    else:
        raise CONSTAbatedException(CONSTAbatedException.UNEXPECTED_OBJECT_TYPE_GOT_S % type(values))


def load_from_yaml(yaml_configuration_file, const_object):
    import yaml
    try:
        fin = open(yaml_configuration_file, 'r')
        raw_yaml = fin.read()
        fin.close()
        __populate_object(const_object, yaml.load(raw_yaml, Loader=yaml.SafeLoader))
    except IOError as e:
        logging.error('Could not open config file %s. Bailing out.' % yaml_configuration_file)
        raise e
    except yaml.scanner.ScannerError as e:
        logging.error('Syntax error in %s. Bailing out.' % yaml_configuration_file)
        raise e

# TODO: load_from_json