find_circ.py 文件源码

def store_index(self,ipath):
        debug("# indexed_fasta.store_index('%s')" % ipath)

        # write to tmp-file first and in the end rename in order to have this atomic 
        # otherwise parallel building of the same index may screw it up.

        import tempfile
        tmp = tempfile.NamedTemporaryFile(mode="w",dir = os.path.dirname(ipath),delete=False)
        for chrom in sorted(self.chrom_stats.keys()):
            ofs,ldata,skip,skipchar,size = self.chrom_stats[chrom]
            tmp.write("%s\t%d\t%d\t%d\t%r\t%d\n" % (chrom,ofs,ldata,skip,skipchar,size))

        # make sure everything is on disk
        os.fsync(tmp)
        tmp.close()

        # make it accessible to everyone
        import stat
        os.chmod(tmp.name, stat.S_IROTH | stat.S_IRGRP | stat.S_IRUSR)

        # this is atomic on POSIX as we have created tmp in the same directory, 
        # therefore same filesystem
        os.rename(tmp.name,ipath)