hi i have this block of code in c++ how to convert it to pyqt4

virtual QByteArray myMapper() const {
assert(0); return QByteArray(256, 0);
}

const QByteArray& sequence = QByteArray("ABCDESFGTTTTTT");
const char* opq = sequence.data() +55;
QByteArray map =myMapper() ;

for(int i=0;i< sequence.size(); i++) {
char rdf= opq[i];
char cl = map.at(rdf)

}