# DNA -> RNA -> Protein
_standardGeneticCode = {
"aaa": "K",
"aac": "N",
"aag": "K",
"aau": "N",
"aca": "T",
"acc": "T",
"acg": "T",
"acu": "T",
"aga": "R",
"agc": "S",
"agg": "R",
"agu": "S",
"aua": "I",
"auc": "I",
"aug": "M",
"auu": "I",
"caa": "Q",
"cac": "H",
"cag": "Q",
"cau": "H",
"cca": "P",
"ccc": "P",
"ccg": "P",
"ccu": "P",
"cga": "R",
"cgc": "R",
"cgg": "R",
"cgu": "R",
"cua": "L",
"cuc": "L",
"cug": "L",
"cuu": "L",
"gaa": "E",
"gac": "D",
"gag": "E",
"gau": "D",
"gca": "A",
"gcc": "A",
"gcg": "A",
"gcu": "A",
"gga": "G",
"ggc": "G",
"ggg": "G",
"ggu": "G",
"gua": "V",
"guc": "V",
"gug": "V",
"guu": "V",
"uaa": "*",
"uac": "Y",
"uag": "*",
"uau": "Y",
"uca": "S",
"ucc": "S",
"ucg": "S",
"ucu": "S",
"uga": "*",
"ugc": "C",
"ugg": "W",
"ugu": "C",
"uua": "L",
"uuc": "F",
"uug": "L",
"uuu": "F"
}    

def translation( theSeq ):
    """Translate DNA to Protein

    >>> translation( "" )
    Traceback (most recent call last):
    ...
    ValueError: substring not found

    >>> translation( "acgt" )
    Traceback (most recent call last):
    ...
    ValueError: substring not found

    >>> translation( "aug" )
    'M'

    >>> translation( "cccauggugacguacugagccuga" )
    'MVTY*'

    >>> translation( "cccauggugacguaccgagccug" )
    'MVTYRA'

    >>> translation( "cccauggugacguaccgagccu" )
    'MVTYRA'

    >>> translation( "cccauggugacguaccgagcc" )
    'MVTYRA'

    >>> translation( "cccauggugacguaccgagc" )
    'MVTYR'

    >>> translation( None )
    Traceback (most recent call last):
    ...
    AttributeError: 'NoneType' object has no attribute 'lower'
    """

    answer = ""
    ourSeq = theSeq.lower()
    n = ourSeq.index( "aug" )
    for i in range( n, len( theSeq ) - (len(theSeq) % 3), 3 ):
        answer += _standardGeneticCode[ourSeq[i:i+3]]
        if answer[-1] == '*':
            break
    return answer

if __name__ == '__main__':
     import doctest
     doctest.testmod()