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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_directive_header(self, sig):
 """Add the directive header and options to the generated content."""

        domain = getattr(self, 'domain', 'py')
        directive = getattr(self, 'directivetype', "module")
        name = self.format_name()
        self.add_line(u'.. %s:%s:: %s%s' % (domain, directive, name, sig),
                      '<autodoc>')
        if self.options.noindex:
            self.add_line(u'   :noindex:', '<autodoc>')
        if self.objpath:
            # Be explicit about the module, this is necessary since .. class::
            # etc. don't support a prepended module name
            self.add_line(u'   :module: %s' % self.modname, '<autodoc>')