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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def getSequenceCombinaisons(polymorphipolymorphicDnaSeqSeq, pos = 0) : 	"""Takes a dna sequence with polymorphismes and returns all the possible sequences that it can yield"""


	if type(polymorphipolymorphicDnaSeqSeq) is not types.ListType :
		seq = list(polymorphipolymorphicDnaSeqSeq)
	else :
		seq = polymorphipolymorphicDnaSeqSeq

	if pos >= len(seq) :
		return [''.join(seq)]

	variants = []
	if seq[pos] in polymorphicNucleotides :
		chars = decodePolymorphicNucleotide(seq[pos])
	else :
		chars = seq[pos]#.split('/')

	for c in chars :
		rseq = copy.copy(seq)
		rseq[pos] = c
		variants.extend(getSequenceCombinaisons(rseq, pos + 1))

	return variants