- Use Py_GetPythonHome() instead of getenv("PYTHONHOME").
- Use Py_GetPythonHome() instead of getenv("PYTHONHOME").

- Don't print error messages when Py_FrozenFlag is set.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator