Method PyMain

Utilities/PythonInterpreter/vtkPythonInterpreter.cxx:699–845

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
int vtkPythonInterpreter::PyMain(int argc, char** argv)
{
  vtksys::SystemTools::EnableMSVCDebugHook();

  int count_v = 0;
  for (int cc = 0; cc < argc; ++cc)
  {
    if (argv[cc] && strcmp(argv[cc], "-v") == 0)
    {
      ++count_v;
    }
    if (argv[cc] && strcmp(argv[cc], "-vv") == 0)
    {
      count_v += 2;
    }
  }

  if (count_v > 0)
  {
    // change the vtkPythonInterpreter's log verbosity. We only touch it
    // if the command line arguments explicitly requested a certain verbosity.
    vtkPythonInterpreter::SetLogVerbosity(vtkLogger::VERBOSITY_INFO);
    vtkLogger::SetStderrVerbosity(vtkLogger::ConvertToVerbosity(count_v - 1));
  }

  vtkLogger::Init(argc, argv, nullptr); // since `-v` and `-vv` are parsed as Python verbosity flags
                                        // and not log verbosity flags.

  // Need two copies of args, because the first array may be modified elsewhere.
  using OwnedCString = std::unique_ptr<char, decltype(&std::free)>;
  std::vector<char*> argvForPython;
  std::vector<OwnedCString> argvCleanup;
  for (int i = 0; i < argc; i++)
  {
    if (!argv[i])
    {
      continue;
    }
    if (strcmp(argv[i], "--enable-bt") == 0)
    {
      vtksys::SystemInformation::SetStackTraceOnError(1);
      continue;
    }
    if (strcmp(argv[i], "-V") == 0)
    {
      // print out VTK version and let argument pass to Py_RunMain(). At which
      // point, Python will print its version and exit.
      std::cout << vtkVersion::GetVTKSourceVersion() << std::endl;
    }

    OwnedCString argCopy(strdup(argv[i]), &std::free);
    if (argCopy == nullptr)
    {
      vtk::print(stderr,
        "Fatal vtkpython error: "
        "unable to copy the command line argument #{:d}\n",
        i + 1);
      return 1;