def __init__(self, ref_data, alt_data):
self._ref_data = ref_data<EOL>self._alt_data = alt_data<EOL>self._protein_accession = self._ref_data.protein_accession<EOL>self._ref_seq = self._ref_data.aa_sequence<EOL>self._alt_seq = self._alt_data.aa_sequence<EOL>self._is_frameshift = self._alt_data.is_frameshift<EOL>self._frameshift_start = self._alt_data.frameshift_start<EOL>self._is_substitution = self._alt_data.is_substitution<EOL>self._is_ambiguous = self._alt_data.is_ambiguous<EOL>self._is_init_met = False<EOL>if DBG:<EOL><INDENT>print("<STR_LIT>".format(len(self._ref_seq), len(self._alt_seq)))<EOL>print("<STR_LIT>".format(self._frameshift_start,<EOL>self._protein_accession))<EOL>print(self._ref_seq)<EOL>print(self._alt_seq)<EOL>print("<STR_LIT>".format(self._alt_data.variant_start_aa))<EOL>print(self._ref_data.transcript_sequence)<EOL>print(self._alt_data.transcript_sequence)<EOL><DEDENT>
Constructor

        :param ref_data: reference transcript record
        :type ref_data: recordtype
        :param alt_data: alt transcript record
        :type ref_data: recordtype