def _check_version(self, config):
try:<EOL><INDENT>self.file_version = config.get(<EOL>escape_for_ini('<STR_LIT>'),<EOL>escape_for_ini('<STR_LIT:version>'),<EOL>)<EOL><DEDENT>except (configparser.NoSectionError, configparser.NoOptionError):<EOL><INDENT>return False<EOL><DEDENT>return True<EOL>
check for a valid version
an existing scheme implies an existing version as well

return True, if version is valid, and False otherwise