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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 init_genome_coordinates(self) : """Creates the self.seqpos2genome dictionary that converts positions relative to the sequence to genome coordinates."""

        self.seqpos2genome = {}

        # record genome positions for each sequence position
        seq_pos = 0
        for estart, eend in self.exons:
            for genome_pos in range(estart, eend):
                if self.strand == '+':
                    self.seqpos2genome[seq_pos] = genome_pos
                elif self.strand == '-':
                    tmp = self.cds_len - seq_pos - 1
                    self.seqpos2genome[tmp] = genome_pos
                seq_pos += 1

        # recode 5' splice site locations
        for i in range(0, self.five_ss_len):
            seq_pos = self.cds_len + i
            ss_ix = i // 2  # the ss_ix'th 5'ss starting from upstream tx
            pos_in_ss = i % 2  # whether first/second nuc in splice site

            # determine genome coordinates for 5' splice site
            if self.strand == '+':
                self.seqpos2genome[seq_pos] = self.exons[ss_ix][1] + pos_in_ss
            else:
                exon_pos = -1 - ss_ix
                self.seqpos2genome[seq_pos] = self.exons[exon_pos][0] - pos_in_ss - 1

        # recode 3' splice site locations
        for i in range(0, self.three_ss_len):
            seq_pos = self.cds_len + self.five_ss_len + i
            ss_ix = i // 2  # the ss_ix'th 3'ss starting from upstream tx
            pos_in_ss = i % 2  # whether first/second nuc in splice site

            # determine genome coordinates for 3' splice site
            if self.strand == '+':
                self.seqpos2genome[seq_pos] = self.exons[ss_ix+1][0] - 2 + pos_in_ss
            else:
                exon_pos = -1 - ss_ix
                self.seqpos2genome[seq_pos] = self.exons[exon_pos-1][1] + 1 - pos_in_ss