Function sync_contexts

Singular/dyn_modules/pyobject/pyobject.cc:662–698

getting stuff from python to Singular namespace

/// getting stuff from python to Singular namespace
void sync_contexts()
{
  PyRun_SimpleString("_SINGULAR_NEW = modules['__main__'].__dict__.copy()");

  PythonObject newElts = python_eval("[(_k, _e)   \
    for (_k, _e) in _SINGULAR_NEW.iteritems() \
    if _k not in _SINGULAR_IMPORTED or not _SINGULAR_IMPORTED[_k] is _e]");

  long len = newElts.size();
  for (long idx = 0; idx < len; ++idx)
  {
    long i = 0;
    char* name = newElts[idx][i].str();
    if (name && (*name != '\0') && (*name != '_'))
    {
      Py_XDECREF(get_current_definition(name));
      i = 1;
      newElts[idx][i].import_as(name);
    }

  }

  PythonObject deletedElts =
    python_eval("list(set(_SINGULAR_IMPORTED.iterkeys()) - \
     set(_SINGULAR_NEW.iterkeys()))");
  len = deletedElts.size();

  for (long idx = 0; idx < len; ++idx)
  {
    char* name = deletedElts[idx].str();
    if (name && (*name != '\0') && (*name != '_'))
      killid(name, &IDROOT);
  }

  PyRun_SimpleString("_SINGULAR_IMPORTED =_SINGULAR_NEW");
  PyRun_SimpleString("del  _SINGULAR_NEW");
}