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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def add_option(self, key, default=NO_VALUE, alternate_keys=NO_VALUE, doc='', parser=str, **meta):
 """Add an option to the group. :arg key: the key to look up :arg default: the default value (if any); must be a string that is parseable by the specified parser :arg alternate_keys: the list of alternate keys to look up; supports a ``root:`` key prefix which will cause this to look at the configuration root rather than the current namespace :arg doc: documentation for this config option :arg parser: the parser for converting this value to a Python object :arg meta: catch-all for other key/value pairs you want to association with this option """

        option = Option(key, default, alternate_keys, doc, parser, meta)
        self.options[key] = option