Method Execute

Wrapping/Python/sitkPyCommand.cxx:95–135

}

void
PyCommand::Execute()
{
  // if null do nothing
  if (!this->m_Object)
  {
    return;
  }

  // make sure that the CommandCallable is in fact callable
  if (!PyCallable_Check(this->m_Object))
  {
    // we throw a standard ITK exception: this makes it possible for
    // our standard CableSwig exception handling logic to take this
    // through to the invoking Python process
    sitkExceptionMacro(<< "Python Callable is not a callable Python object, "
                       << "or it has not been set.");
  }
  else
  {
    PyGILStateEnsure gil;

    PyObject * result;

    result = PyObject_CallObject(this->m_Object, (PyObject *)NULL);

    if (result)
    {
      Py_DECREF(result);
    }
    else
    {
      // there was a Python error.  Clear the error by printing to stdout
      PyErr_Print();
      // make sure the invoking Python code knows there was a problem
      // by raising an exception
      sitkExceptionMacro(<< "There was an error executing the "
                         << "Python Callable.");
    }
  }
}


} // namespace simple