title: How can I add a cookie to an existing cookielib CookieJar instance in Python?
body: <p>I have a <em>CookieJar</em> that's being used with <em>Mechanize</em> that I want to add a cookie to. How can I go about doing this?</p>
  <p>make_cookie() and set_cookie() weren't clear enough for me.</p>
  <pre><code>br = mechanize.Browser()
  cj = cookielib.LWPCookieJar()
  br.set_cookiejar(cj)
  </code></pre>