def get_value(repo_directory, key, expect_type=None):
    """Gets the value of the specified key in the config file."""
    config = read_config(repo_directory)
    value = config.get(key)
    if expect_type and value is not None and not isinstance(value, expect_type):
        raise ConfigSchemaError('Expected config variable %s to be type %s, got %s'
            % (repr(key), repr(expect_type), repr(type(value))))
    return value
Gets the value of the specified key in the config file.