Method expand_default

Lib/optparse.py:273–281

(self, option)

    def expand_default(self, option):
        if self.parser is None or not self.default_tag:
            return option.help

        default_value = self.parser.defaults.get(option.dest)
        if default_value is NO_DEFAULT or default_value is None:
            default_value = self.NO_DEFAULT_VALUE

        return option.help.replace(self.default_tag, str(default_value))

    def format_option(self, option):
        # The help for each option consists of two parts: