def lower_clean_string(string):
    """
    Function used to make string lowercase filter out punctuation

    :param string: Text string to strip clean and make lower case.
    :return: String in lowercase with all punctuation stripped.
    """

    punctuation = '!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~[\n]'
    lowercase_string = string.lower()
    for character in punctuation:
        lowercase_string = lowercase_string.replace(character, '')
    return lowercase_string