fix python 3 issues with the new interpreter implementation
fix python 3 issues with the new interpreter implementation

WoLpH/jedi,mfussenegger/jedi,tjwei/jedi,jonashaag/jedi,jonashaag/jedi,WoLpH/jedi,tjwei/jedi,flurischt/jedi,flurischt/jedi,dwillmer/jedi,dwillmer/jedi,mfussenegger/jedi