human
Complete the below
def autovary(ignore=None, debug=False):

    ''''Auto-populate the Vary response header based on request.header access.'
    '''

=====
What is a the Python code you requested?
assistant
#Here is the Python code you requested.
    request = cherrypy.serving.request
    req_h = request.headers
    request.headers = MonitoredHeaderMap()
    request.headers.update(req_h)
    if (ignore is None):
        ignore = set(['Content-Disposition', 'Content-Length', 'Content-Type'])
    def set_response_header():
        resp_h = cherrypy.serving.response.headers
        v = set([e.value for e in resp_h.elements('Vary')])
        if debug:
            cherrypy.log(('Accessed    headers:    %s' % request.headers.accessed_headers), 'TOOLS.AUTOVARY')
        v = v.union(request.headers.accessed_headers)
        v = v.difference(ignore)
        v = list(v)
        v.sort()
        resp_h['Vary'] = ',    '.join(v)
    request.hooks.attach('before_finalize', set_response_header, 95)