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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 get_page(url):

 """
 Request the given URL and return the response page, using the cookie jar.
 
 @type url: str
 @param url: URL to retrieve.
 
 @rtype: str
 @return: Web page retrieved for the given URL.
 
 @raise IOError: An exception is raised on error.
 @raise urllib2.URLError: An exception is raised on error.
 @raise urllib2.HTTPError: An exception is raised on error.
 """

    request = Request(url)
    request.add_header('User-Agent',
                       'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0)')
    cookie_jar.add_cookie_header(request)
    response = urlopen(request)
    cookie_jar.extract_cookies(response, request)
    html = response.read()
    response.close()
    cookie_jar.save()
    return html