ORFFinderInGraph.py 文件源码

def _reverse_orf_read(s):
        """
        Reads given string back until encounters stop-codon. Also write last encounter of start-codon
        :param s: string
        :return t, t_part_orf, fl, is_stop:
            t - pos of end reading
            t_part_orf - pos of current ORF's start
            fl - True if start codon was read
            is_stop - True if the reading was interrupted by stop codon
        """
        t = len(s)
        t_part_orf = t
        fl = False
        while True:  # do..while
            if s[t - 3:t] in ORFsInGraph.starts:
                t_part_orf = t - 3
                fl = True
            t -= 3
            if (s[t - 3:t] in ORFsInGraph.stops) or t < 3:
                break
        return t, t_part_orf, fl, s[t - 3:t] in ORFsInGraph.stops