@staticmethod
def get_quality_symbols():
    """returns a list of all allowed quality symbols in asc order:
            lowest--->highest
            !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~]
        """
    all_string = (
        '!"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~]'
        )
    return list(all_string)
