@@ -0,0 +1,758 @@
+import string%0A%0Aclass Sequence:%0A%0A    # the order of the nucleotide in alphabet is important%0A    # to compute easily the revese complement%0A    alphabet = 'AGCT'%0A%0A    def __init__(self, seq):%0A        %22%22%22%0A        :param seq: the sequence%0A        :type seq: string%0A        %22%22%22%0A        self.sequence = seq%0A%0A    def reverse_comp(self):%0A        %22%22%22%0A        :return: the reverse complement of this sequence%0A        :rtype: :class:%60Sequence%60 instance%0A        %22%22%22%0A        rev = self.sequence%5B::-1%5D%0A        table = string.maketrans(self.alphabet, self.alphabet%5B::-1%5D)%0A        rev_comp = string.translate(self.sequence, table)%0A        return Sequence(rev_comp)%0A%0A%0Amy_seq = Sequence('GAATTCC')%0Arev_comp = my_seq.reverse_comp()%0Aprint my_seq.sequence%0Aprint rev_comp.sequence%0A

add code for methods reference in methods paragraph