[KevinH]

Originally Posted by wrCisco

Since my program crashed while calling PyObject_CallObject (inside runInPython), it was probably a problem with the conversion the other way around, from QList<int> to QVariant.

Okay I ran the following testcase and got this to work. I think a QVariant of a QList should work directly but I could not get it to work.

In PythonRoutines.cpp and .h
-------------------------------------

int PythonRoutines::SumIntList(const QList<int>& ilist);

int PythonRoutines::SumIntList(const QList<int>& ilist)
{
    int results;
    int rv = -1;
    QString error_traceback;
    QList<QVariant> args;
    QVariantList qvl;
    foreach(int v, ilist) {
       qvl.append(QVariant(v));
    }
    args.append(QVariant(qvl));

    EmbeddedPython * epython  = EmbeddedPython::instance();

    QVariant res = epython->runInPython( QString("testcase"),
                                         QString("sum_int_list"),
                                         args,
                                         &rv,
                                         error_traceback);
    if (rv == 0) {
        results = res.toInt();
    }
    return results;
}

And in the python3lib I used the following testcase.py

import sys
import os

def sum_int_list(alist):
    sum = 0
    for v in alist:
        sum = sum + v
    return sum

And here is how I invoked it:

   // test pass ing list of ints to python routine                                                                             
    QList<int> alist;
    alist << 1 << 3 << 6 << 9;
    PythonRoutines pr;
    int sum = pr.SumIntList(alist);
    qDebug() << "Sum from SumIntList is: " << sum;

I will work on lists.

But this should get you going.