def concat_key_value(str_dict):
    """concat keys and values of dict containing strings elements
    into a list

    Parameters
    ----------
    str_dict: dict
        dict to process
        {key1: value1, key2: value2}

    Returns
    -------
    list
        ['key1 value1', 'key2 value2']
    """
    return [key + ' ' + value for key, value in str_dict.items()]