'Return a list of files opened by the project.'

def get_recent_files(self):

    recent_files = self.CONF[WORKSPACE].get('main', 'recent_files', default=[])
    for recent_file in recent_files[:]:
        if (not os.path.isfile(recent_file)):
            recent_files.remove(recent_file)
    return list(set(recent_files))
